Page 1 CONTENTS MULTIPOINT FUEL INJECTION (MPI) ........
Page 2: Table Of Contents
..... General Specifications ....Multipoint Fuel Injection System Diagram . . . SERVICE SPECIFICATIONS .
Page 3: Multipoint Fuel Injection (Mpi) <4G6
13A-3 MPI <4G6> - General/General Information/Service Specifications MULTIPOINT FUEL INJECTION (MPI) <4G6> GENERAL OUTLINE OF CHANGES Due to the changes shown below, the service procedures regarding the different description from the previous version have been established. On-board Diagnostics System has been adopted to expand the diagnostic items and to change diagnosis code numbering system.
Page 4: Troubleshooting
Oxygen sensor heater (front) system <sensor 1> P0136 Oxygen sensor (rear) system <sensor 2> P0141 Oxygen sensor heater (rear) system <sensor 2> P0170 Abnormal fuel system P0201 No. 1 injector system P0202 No. 2 injector system P0203 No. 3 injector system P0204 No.
Page 5 13A-5 MPI <4G6> - MPI <4G6> - Troubleshooting Troubleshooting Code No. Diagnosis item P0403 EGR valve system P0420 Catalyst malfunction P0443 Purge control solenoid valve system P0505 Idle speed control system P0510 Idle position switch system P0551 Power steering fluid pressure switch system NOTE 1.
Page 6 Display item list Data item Unit Engine coolant temperature sensor Engine speed r/min Vehicle speed km/h Long-term fuel compensation (long-term fuel trim) Short-term fuel compensation (short-term fuel trim) Fuel control condi- Open loop tion Closed loop Open loop owing to OL-DRV.
Page 7: Fail-Safe Function Reference Table
Air/fuel ratio feedback control (closed loop control) is not performed. Oxygen sensor (rear) Performs the feedback control (closed loop control) of the air/fuel ratio by using only the signal of the oxygen sensor (front) installed on the front of the catalytic converter.
Page 8: Inspection Chart For Diagnosis Codes
Oxygen sensor heater (front) system <sensor 1> 13A-23 P0136 Oxygen sensor (rear) system <sensor 2> 13A-24 P0141 Oxygen sensor heater (rear) system <sensor 2> 13A-26 P0170 Abnormal fuel system 13A-27 P0201 No. 1 injector system 13A-28 P0202 No. 2 injector system 13A-28 P0203 No.
Page 9 13A-9 MPI <4G6> - Troubleshooting NOTE 1. Do not replace the engine-ECU <M/T> or engine-A/T-ECU <A/T> until a through terminal check reveals there are no short/open circuit. 2. Check that the engine-ECU <M/T> or engine-A/T-ECU <A/T> earth circuit is normal before checking for the cause of the problem.
Page 10: Inspection Procedure Classified By Diagnosis Code
13A-10 MPI <4G6> - Troubleshooting INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE Code No. P0100 Air flow sensor system Probable cause Range of Check D Malfunction of air flow sensor D Engine speed: 500 r/min or more D Open or short circuit in air flow sensor circuit or Set Conditions loose connector contact D The sensor output frequency is 3.3 Hz or less for four seconds.
Page 11 13A-11 MPI <4G6> - Troubleshooting From the previous page Repair Check the following connector: Measure at air flow sensor connector C-34 <M/T>, C-177 <A/T> B-12. D Use test harness (MB991709) to connect the connector, and measure at the pick-up harness. Check the harness between the air Repair D Ignition switch: ON...
Page 12 13A-12 MPI <4G6> - Troubleshooting Code No. P0105 Barometric pressure sensor system Probable cause Range of Check D Malfunction of barometric pressure sensor D Two seconds have passed since the ignition switch is turned ON or the D Open or short circuit in barometric pressure engine starting process is completed.
Page 13 13A-13 MPI <4G6> - Troubleshooting From the previous page (1) NG Measure at air flow sensor connector Check the following connectors: Repair (3) NG B-12. C-40 <M/T>, C-176 <A/T>, C-47 D Connect connector terminals No. <RHD> 1, No. 2 and No. 5 only by using test harness (MB991709), and measure at the pick-up harness.
Page 14 13A-14 MPI <4G6> - Troubleshooting Code No. P0110 Intake air temperature sensor system Probable cause Range of Check D Malfunction of intake air temperature sensor D Two seconds have passed since the ignition switch is turned ON or the D Open or short circuit in intake air temperature engine starting process is completed.
Page 15 13A-15 MPI <4G6> - Troubleshooting From the previous page Measure at air flow sensor connector Check the following connector: Repair B-12. C-40 <M/T>, C-176 <A/T> D Use the test harness (MB991709) to connect only terminals 5 and 6, and then measure at the Check the harness between the air pick-up harness.
Page 16 13A-16 MPI <4G6> - MPI <4G6> - Troubleshooting Troubleshooting Code No. P0115 Engine coolant temperature sensor Probable cause system Range of Check D Malfunction of engine coolant temperature sensor D Engine: Two seconds after the engine has been started D Open or short circuit in the engine coolant Set Conditions temperature sensor circuit or loose connector D The sensor output voltage is 4.6 V or more for four seconds (equivalent to...
Page 17 13A-17 MPI <4G6> - Troubleshooting From the previous page (1) NG Measure at engine-ECU connector Measure at engine coolant Check the following connector: C-40 <M/T> or engine-A/T-ECU temperature sensor connector B-33. C-40 <M/T>, C-176 <A/T> connector C-176 <A/T>. D Disconnect the connector and D Measure the voltage at the measure at the harness side.
Page 18 13A-18 MPI <4G6> - Troubleshooting Code No. P0120 Throttle position sensor system Probable cause Range of Check D Malfunction of throttle position sensor D Excluding two seconds after the ignition switch is turned ON or immediately D Improper connector contact, open circuit or after the engine starts.
Page 19 13A-19 MPI <4G6> - Troubleshooting From the previous page (1) NG Measure at throttle position sensor Check the following connector: Repair (2) NG connector B-07. C-40 <M/T>, C-176 <A/T> D Use test harness (MB991536) to connect the connector, and measure at the pick-up harness. Check the harness wire between the D Ignition switch: ON throttle position sensor and the...
Page 20 13A-20 MPI <4G6> - Troubleshooting Code No. P0125 Feedback system Probable cause Range of Check D Malfunction of oxygen sensor (front) D The engine coolant temperature is approx. 80_C or more. D Open or short circuit in the oxygen sensor (front) D During stoichiometric feedback control circuit or loose connector contact D The vehicle is not being decelerated.
Page 21: Code
(front) inside the engine-ECU. Range of Check D Engine speed is 2,800 r/min or less D During driving D During air/fuel ratio feedback control Set Conditions D The oxygen sensor (front) output frequency is six or less per 10 seconds on average.
Page 22 13A-22 MPI <4G6> - Troubleshooting Repair Check the following connector: C-46 Check the following connector: Repair Measure at oxygen sensor (front) C-40 <M/T>, C-176 <A/T> connector C-46. D Disconnect the connector and measure at the harness side. Repair Check the harness wire between the D Resistance between terminal 2 oxygen sensor (front) and the and earth...
Page 23 13A-23 MPI <4G6> - Troubleshooting Code No. P0135 Oxygen sensor heater (front) system Probable cause <sensor 1> Range of Check D Malfunction of oxygen sensor heater (front) D The engine coolant temperature is approx. 20_C or more. D Open or short circuit in the oxygen sensor heater D The oxygen sensor heater (front) remains on.
Page 24 13A-24 MPI <4G6> - Troubleshooting Code No. P0136 Oxygen sensor (rear) system <sensor Probable cause 2> Range of Check D Malfunction of oxygen sensor (rear) D Three minutes have been passed since the engine has been started. D Open or short circuit in the oxygen sensor (rear) D The engine coolant temperature is approx.
Page 25 13A-25 MPI <4G6> - Troubleshooting Repair Check the following connector: C-85 Measure at oxygen sensor (rear) Check the following connector: Repair connector C-85. C-40 <M/T>, C-176 <A/T> D Disconnect the connector and measure at the harness side. Check the harness wire between the Repair D Resistance between terminal 2 oxygen sensor (rear) and the...
Page 26 13A-26 MPI <4G6> - Troubleshooting Code No. P0141 Oxygen sensor heater (rear) system Probable cause <sensor 2> Range of Check D Malfunction of oxygen sensor heater (rear) D The engine coolant temperature is approx. 20_C or more. D Open or short circuit in the oxygen sensor heater D The oxygen sensor heater (rear) remains on.
Page 27 D Malfunction of fuel supply system Set Conditions D Malfunction of oxygen sensor (front) D Ten seconds or more have been passed while the fuel injection amount D Malfunction of intake air temperature sensor compensation value is too low. D Malfunction of barometric pressure sensor...
Page 28 13A-28 MPI <4G6> - Troubleshooting Code No. P0201 No. 1 injector system Probable cause Code No. P0202 No. 2 injector system Code No. P0203 No. 3 injector system Code No. P0204 No. 4 injector system Range of Check D Malfunction of the injector D Engine speed is approx.
Page 29 13A-29 MPI <4G6> - Troubleshooting Code No. P0300 Ignition coil (power transistor) system Probable cause Range of Check D Malfunction of the ignition coil D Engine speed is approx. 50 - 4,000 r/min. D Malfunction of the ignition failure sensor D Engine is not cranking.
Page 30 13A-30 MPI <4G6> - Troubleshooting Repair Check the following connectors: MUT-II Actuator Test The ignition coil connectors for a 01 No. 1 injector 02 No. 2 injector defective cylinder (B-01, B-11). 03 No. 3 injector 04 No. 4 injector OK: The idling condition should Replace Check the spark plug and the change.
Page 31 13A-31 MPI <4G6> - Troubleshooting Code No. P0301 No. 1 cylinder misfire detected Probable cause Code No. P0302 No. 2 cylinder misfire detected Code No. P0303 No. 3 cylinder misfire detected Code No. P0304 No. 4 cylinder misfire detected Range of Check D Malfunction of the ignition system D The engine speed is 500 - 4,500 r/min.
Page 32 13A-32 MPI <4G6> - Troubleshooting Code No. P0325 Detonation sensor system Probable cause Range of Check D Malfunction of the detonation sensor D Engine: Two seconds after the engine has been started D Open or short circuit in the detonation sensor Set Conditions circuit or loose connector contact D Changes in sensor output voltage (detonation sensor peak voltage per 1/2...
Page 33 13A-33 MPI <4G6> - Troubleshooting Intermittent malfunction MUT-II Data list (Refer to GROUP 00 - Points to 22 Crank angle sensor Note for Intermittent Malfunctions.) OK: Refer to P.13A-75, DATA LIST REFERENCE TABLE. Repair Check the following connector: B-77 (1) NG Measure at the crank angle sensor Check the harness between the connector B-77.
Page 34 13A-34 MPI <4G6> - Troubleshooting Code No. P0340 Camshaft position sensor system Probable cause Range of Check D Malfunction of the camshaft position sensor D Ignition switch: ON D Open or short circuit in the camshaft position D Engine speed: 50 r/min or more sensor circuit or loose connector contact.
Page 35 13A-35 MPI <4G6> - Troubleshooting Repair Check the following connector: B-64 (1) NG Repair Check the following connector: Measure at camshaft position sensor connector B-64. C-31 D Disconnect the connector and measure at the harness side. (1) The voltage between terminal 3 Check the harness wire between the and earth camshaft position sensor connector...
Page 36 13A-36 MPI <4G6> - Troubleshooting Code No. P0403 EGR control solenoid valve system Probable cause Range of Check D Malfunction of the EGR control solenoid valve D Ignition switch: ON D Open or short circuit in the EGR control solenoid D Battery voltage is 10 V or more.
Page 37 D The engine speed is 3,000 r/min or less. D Malfunction of the oxygen sensor (front) D During driving D Malfunction of the oxygen sensor (rear) D During air/fuel ratio feedback control D Malfunction of engine-ECU <M/T> Set Conditions D Malfunction of engine-A/T-ECU <A/T>...
Page 38 13A-38 MPI <4G6> - Troubleshooting Code No. P0443 Purge control solenoid valve system Probable cause Range of Check D Malfunction of the purge control solenoid valve D Ignition switch: ON D Open or short circuit in the purge control solenoid D Battery voltage is 10 V or more.
Page 39 13A-39 MPI <4G6> - Troubleshooting Code No. P0500 Vehicle speed sensor system Probable cause Range of Check D Malfunction of the vehicle speed sensor D Engine: Two seconds after the engine was started D Open or short circuit in the vehicle speed sensor D Idle switch: OFF circuit or loose connector contact D Engine speed: 2,500 r/min or more...
Page 40 13A-40 MPI <4G6> - Troubleshooting MUT-II Self-Diag code RefertoP.13A-8, INSPECTIONCHART Is any diagnosis code other than No. FOR DIAGNOSIS CODES. P0505 output? Check intake air hose and intake Repair manifold for air intake. Check the throttle body (around the Clean around the throttle valve. throttle valve) for contamination.
Page 41 13A-41 MPI <4G6> - MPI <4G6> - Troubleshooting Troubleshooting From the previous page Check the following connector: Repair C-34 <M/T>, C-177 <A/T> Check the harness wires between Repair the engine control relay and the idle speed control servo, and between the idle speed control servo and the engine-ECU <M/T>...
Page 42 13A-42 MPI <4G6> - Troubleshooting Code No. P0551 Power steering fluid pressure switch Probable cause system Check Area D Power steering fluid pressure switch failed. D Intake air temperature is - 10_C or higher. D Open or shorted power steering fluid pressure D Barometric pressure is 76 kPa or higher.
Page 43 13A-43 MPI <4G6> - Troubleshooting Code No. P1500 Alternator FR terminal system Probable cause Range of Check D Open circuit in alternator FR terminal circuit D Engine speed: 50 r/min or more D Malfunction of engine-ECU <M/T> Set Conditions D Malfunction of engine-A/T-ECU <A/T> D Input voltage from the alternator FR terminal is system voltage for 20 seconds.
Page 44 13A-44 MPI <4G6> - Troubleshooting Cord No. P1610 Immobilizer system Probable cause Range of Check D Open or short circuit, or loose connector contact D Ignition switch: ON D Malfunction of the immobilizer-ECU Set Conditions D Malfunction of the engine-ECU <M/T> D Improper communication between the engine-ECU <M/T>...
Page 45: Inspection Chart For Trouble Symptoms
13A-45 MPI <4G6> - Troubleshooting INSPECTION CHART FOR TROUBLE SYMPTOMS Trouble symptom Inspection Reference procedure page Communication Communication with all systems is not possible. 13A-46 with MUT-II is Communication with engine-ECU <M/T> or engine-A/T-ECU <A/T> 13A-46 impossible. only is not possible. Engine warning The engine warning lamp does not illuminate right after the ignition 13A-47...
Page 46: Inspection Procedure For Trouble Symptoms
13A-46 MPI <4G6> - Troubleshooting INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS INSPECTION PROCEDURE 1 Communication with MUT-II is not possible. Probable cause (Communication with all systems is not possible.) The cause is probably a defect in the power supply system (including earth) for the D Malfunction of the connector diagnosis line.
Page 47 13A-47 MPI <4G6> - Troubleshooting INSPECTION PROCEDURE 3 The engine warning lamp does not illuminate right after Probable cause the ignition switch is turned to the ON position. Because there is a burnt-out bulb, the engine-ECU <M/T> or engine-A/T-ECU <A/T> D Burnt-out bulb causes the engine warning lamp to illuminate for five seconds immediately after the D Defective warning lamp circuit...
Page 48 D Malfunction of the ignition system or that the supply of fuel to the combustion chamber is defective. D Malfunction of the fuel pump system In addition, foreign materials (water, kerosene, etc.) may be mixed with the fuel. D Malfunction of the injectors D Malfunction engine-ECU <M/T>...
Page 49 D Check if the injectors are clogged. D Check the compression pressure. D Check fuel lines for clogging. D Check if foreign materials (water, alcohol, etc.) got into fuel. NOTE: Refer to the ’97 GALANT Workshop Manual (Pub. No. PWDE9611)
Page 50 OK: Approx. 5_BTDC Check the following items. D Check the ignition coil, spark plugs, spark plug cables. D Check if the injectors are clogged. D Check the compression pressure. D Check if foreign materials (water, alcohol, etc.) got into fuel.
Page 51 INSPECTION PROCEDURE 8 Unstable idling (Rough idling, hunting) Probable cause In cases as the above, the cause is probably that the ignition system, air/fuel mixture, D Malfunction of the ignition system idle speed control (ISC) or compression pressure is defective.
Page 52 D Check the ignition coil, spark plugs, spark plug cables. D Check the purge control system. D Check the EGR control system. D Check the compression pressure. D Check if foreign materials (water, alcohol, etc.) got into fuel. NOTE: Refer to the ’97 GALANT Workshop Manual (Pub. No. PWDE9611)
Page 53 13A-53 MPI <4G6> - Troubleshooting INSPECTION PROCEDURE 9 Idling speed is high. (Improper idling speed) Probable cause In such cases as the above, the cause is probably that the intake air volume during D Malfunction of the ISC system idling is too great. D Malfunction of the throttle body MUT-II Self-Diag code Refer to P.13A-8, INSPECTION CHART FOR DIAGNOSIS...
Page 54 13A-54 MPI <4G6> - Troubleshooting INSPECTION PROCEDURE 10 Idling speed is low. (Improper idling speed) Probable cause In cases such as the above, the cause is probably that the intake air volume during D Malfunction of the ISC system idling is too small. D Malfunction of the throttle body MUT-II Self-Diag code Refer to P.13A-8, INSPECTION CHART FOR DIAGNOSIS...
Page 55 MUT-II Actuator test INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.) 10 EGR control solenoid valve (Refer to P.13A-80.) Check the fuel pressure. (Refer to P.13A-85*.) Check the ignition timing. Check that the crank angle sensor is installed properly. (Refer to GROUP 11A - On-vehicle Service.) Check the following items.
Page 56 When the engine is hot, it stalls at idling. (Die out) Probable cause In such cases as the above, the cause is probably that ignition system, air/fuel mixture, D Malfunction of the ignition system idle speed control (ISC) or compression pressure is defective.
Page 57 D Check the ignition coil, spark plugs, spark plug cables. D Check if the injectors are clogged. D Check the compression pressure. D Check if foreign materials (water, alcohol, etc.) got into fuel. NOTE: Refer to the ’97 GALANT Workshop Manual (Pub. No. PWDE9611)
Page 58 In cases such as the above, the cause is probably misfiring due to a weak spark, D Drawing air into intake system or an inappropriate air/fuel mixture when the accelerator pedal is depressed. D Malfunction of the ignition system MUT-II Self-Diag code Refer to P.13A-8, INSPECTION CHART FOR DIAGNOSIS...
Page 59 INSPECTION PROCEDURE 15 Hesitation, sag or stumble Probable cause In cases such as the above, the cause is probably that ignition system, air/fuel mixture D Malfunction of the ignition system or compression pressure is defective. D Malfunction of air/fuel ratio control system...
Page 60 2. Check the injector for D Check the EGR control system. clog. D Check the compression pressure. D Check the fuel filter or fuel line for clogging. NOTE: Refer to the ’97 GALANT Workshop Manual (Pub. No. PWDE9611) INSPECTION PROCEDURE 16...
Page 61 Troubleshooting INSPECTION PROCEDURE 18 Poor acceleration Probable cause Defective ignition system, abnormal air/fuel ratio, poor compression pressure, etc. D Malfunction of the ignition system are suspected. D Malfunction of air/fuel ratio control system D Malfunction of the fuel supply system...
Page 62 D Check the ignition coil, spark plugs, spark plug cables. 2. Check the injector for D Check the compression pressure. clog. D Check the fuel filter or fuel line for clogging. D Broken air intake hose D Clogged air cleaner NOTE:...
Page 63 Troubleshooting INSPECTION PROCEDURE 19 Surge Probable cause Defective ignition system, abnormal air/fuel ratio, etc. are suspected. D Malfunction of the ignition system D Malfunction of air/fuel ratio control system D Malfunction of the EGR control solenoid valve system MUT-II Self-Diag code Refer to P.13A-8, INSPECTION CHART FOR DIAGNOSIS...
Page 64 TION PROCEDURE FOR DIAGNOSIS CODE P0325.) compared to when the detonation sensor connector is connected. Check the following items. D Spark plugs D Check if foreign materials (water, alcohol, etc.) got into fuel. INSPECTION PROCEDURE 21 Dieseling Probable cause Fuel leakage from injectors is suspected.
Page 65 INSPECTION PROCEDURE 22 Too high CO and HC concentration when idling Probable cause Abnormal air/fuel ratio is suspected. D Malfunction of the air/fuel ratio control system D Deteriorated catalyst MUT-II Self-Diag code Refer to P.13A-8, INSPECTION CHART FOR DIAGNOSIS Are diagnosis codes displayed? CODES.
Page 66 13A-66 MPI <4G6> - Troubleshooting INSPECTION PROCEDURE 23 Low alternator output voltage (approx. 12.3 V) Probable cause The alternator may be defective, or malfunctions, which are listed in the right column, D Malfunction of charging system may be suspected. D Short circuit in harness between alternator G terminal and engine-ECU <M/T>...
Page 67 13A-67 MPI <4G6> - Troubleshooting INSPECTION PROCEDURE 25 Fans (radiator fan, A/C condenser fan) are inoperative Probable cause The engine-ECU <M/T> or engine-A/T-ECU <A/T> outputs a duty signal to the D Malfunction of the fan motor relay fan controller depending on the engine coolant temperature, vehicle speed, and D Malfunction of the fan motor air conditioner switch condition.
Page 68 13A-68 MPI <4G6> - Troubleshooting INSPECTION PROCEDURE 26 Engine-ECU <M/T> or engine-A/T-ECU <A/T> power Probable cause supply and earth circuit system The engine-ECU <M/T> or engine-A/T-ECU <A/T> may be defective, or that one D Improper connector contact, open circuit of the malfunctions listed at right has occurred. short-circuited harness wire in the engine-ECU <M/T>...
Page 69 The engine-ECU <M/T> or engine-A/T-ECU <A/T> turns the control relay ON when D Malfunction of the fuel pump relay the engine is cranking or running, and this supplies power to drive the fuel pump. D Malfunction of the fuel pump...
Page 70 (2) Continuity between 2 and earth Check the following connector: OK: Continuity E-11 Repair Check trouble symptom. Check the harness wire between the fuel pump and earth, and repair if neces- Check the following connector: sary. Repair E-16 Replace the fuel pump. Check trouble symptom.
Page 71 D Malfunction of the inhibitor switch <A/T> The engine-ECU <M/T> or engine-A/T-ECU <A/T> uses this signal to carry out D Open circuit or short-circuited harness wire of the functions such as fuel injection control during starting. ignition switch circuit D Malfunction of the engine-ECU <M/T>...
Page 72 13A-72 MPI <4G6> - Troubleshooting INSPECTION PROCEDURE 30 A/C switch and A/C relay system Probable cause When an A/C ON signal is input to the engine-ECU <M/T> or engine-A/T-ECU <A/T>, D Malfunction of A/C control system the engine-ECU <M/T> or engine-A/T-ECU <A/T> carries out control of the idle speed D Malfunction of A/C switch control (ISC) servo, and also operates the A/C compressor magnetic clutch.
Page 73 13A-73 MPI <4G6> - Troubleshooting Replace Check the ignition coil. (Refer to GROUP 16 - Ignition System.) Replace Check the ignition failure sensor. (Refer to GROUP 16 - Ignition System.) Check the following Measure at the ignition failure sensor connector B-105. Repair D Disconnect the connector and measure at the harness side.
Page 74 13A-74 MPI <4G6> - Troubleshooting From the previous page (1) NG Measure at the ignition failure sensor connector B-105. Check the following Repair connector: C-38 <M/T>, D Disconnect the connector and measure at the harness side. C-176 <A/T> (1) Voltage between 2 and earth (Ignition switch: ON) OK: 4 V or more (2) Continuity between 1 and earth OK: Continuity...
Page 75: Data List Reference Table
200 mV or less Code No. 13A-21 sensor warmed up engine is suddenly P0130 (front) decelerated Air/fuel mixture made leaner when de- When engine is sud- 600 - 1,000 mV celerating, and is made denly raced richer when racing. Engine: After having...
Page 76 13A-76 MPI <4G6> - Troubleshooting Item Inspection Inspection contents Normal condition Inspection Reference item procedure page Intake Ignition switch: ON or When intake air tem- - 20_C Code No. 13A-14 temperature with engine running perature is - 20_C P0110 sensor When intake air tem- perature is 0_C When intake air tem-...
Page 77 13A-77 MPI <4G6> - Troubleshooting Item Inspection Inspection contents Normal condition Inspection Reference item procedure page Crank angle Engine: Cranking Compare the engine Accord Code No. 13A-32 sensor Tachometer: speed readings on P0335 Connected the tachometer and the MUT-II. Engine: Idling When engine cool- 1,275 - 1,475 rpm Idle...
Page 78 13A-78 MPI <4G6> - Troubleshooting Item Inspection Inspection contents Normal condition Inspection Reference item procedure page Injectors* Engine: Cranking When engine cool- 12 - 19 ms ant temperature is 0_C (injection is car- ried out for all cylin- ders simultaneously) When engine cool- 26 - 40 ms ant temperature is...
Page 79 P0170 pensation Calculation Engine: Warm Engine: Idling 15 - 35 % load value 2,500 r/min 15 - 35 % Fuel control Engine: Warm 2,500 r/min Closed loop Code No. 13A-20 condition P0125 when engine is sud- Open loop - drive...
Page 80: Actuator Test Reference Table
Idling condition Code No. 13A-28 1 injector up/Engine is idling becomes different P0201 (becomes unsta- (Cut the fuel supply to each Cut fuel to No. Code No. 13A-28 ble). injector in turn and check 2 injector P0202 cylinders which don’t affect idling.)
Page 81: Check At The Engine-Ecu Terminals
13A-81 MPI <4G6> - Troubleshooting CHECK AT THE ENGINE-ECU TERMINALS Needle-nosed wire probe TERMINAL VOLTAGE CHECK CHART 1. Connect a needle-nosed wire probe (test harness: MB991223 or paper clip) to a voltmeter probe. 2. Insert the needle-nosed wire probe into each of the engine-ECU <M/T>...
Page 82 13A-82 MPI <4G6> - Troubleshooting Engine-ECU <M/T> Connector Terminal Engine-A/T-ECU <A/T> Connector Terminal Arrangement Arrangement Terminal Terminal Check item Check condition (Engine condition) Normal condition No. <M/T> No. <A/T> No. 1 injector While engine is idling after having From 11 - 14 V, momentarily warmed up, suddenly depress the drops slightly No.
Page 83 Radiator fan and condenser fan are not 0 - 0.3 V operating Radiator fan and condenser fan are 0.7 V or more operating Fuel pump Ignition switch: ON System voltage relay Engine: Idle speed 0 - 3 V A/C switch 2 Engine: Idling When A/C is MAX.
Page 84 13A-84 MPI <4G6> - Troubleshooting Terminal Terminal Check item Check condition (Engine condition) Normal condition No. <M/T> No. <A/T> Oxygen Engine: Idling after warming up 0 - 3 V sensor (front) Engine r/min: 5,000 r/min. System voltage heater Oxygen Engine: Idling after having warmed up 0 - 3 V sensor (rear) Engine r/min: 5,000 r/min...
Page 85 13A-85 MPI <4G6> - Troubleshooting Terminal Terminal Check item Check condition (Engine condition) Normal condition No. <M/T> No. <A/T> Throttle Ignition switch: Set throttle valve 0.3 - 1.0 V position to idle position sensor Fully open throttle 4.5 - 5.5 V valve Barometric Ignition switch:...
Page 86 13A-86 MPI <4G6> - Troubleshooting Caution If the terminals that should be checked are mistaken, or if connector terminals are not correctly shorted to earth, damage may be caused to the vehicle wiring, sensors, engine-ECU <M/T> or engine-A/T-ECU <A/T> and/or ohmmeter. Be careful to prevent this! 4.
Page 87 13A-87 MPI <4G6> - Troubleshooting Terminal Terminal Inspection item Normal condition (Check condition) No.<M/T> No. <A/T> 72 - 92 64 - 57 Intake air temperature sensor 5.3 - 6.7 kW (When intake air temperature is 0_C) 2.3 - 3.0 kW (When intake air temperature is 20_C) 1.0 - 1.5 kW (When intake air temperature is 40_C)
Page 88: Inspection Procedure Using An Analyzer
13A-88 MPI <4G6> - Troubleshooting INSPECTION PROCEDURE USING AN ANALYZER On vehicles with A/T, the ECU controls the engine and the transmission comprehensively (This is called engine-A/T- ECU). Due to this, the following describe only the inspection procedures at the engine-A/T-ECU terminals. On vehicles with M/T, the ECU (engine-ECU) has not been changed, so the inspection procedures at the ECU terminals are the same as before.
Page 89: On-Vehicle Service
Engine Oxygen sensor Remarks output voltage When 0.6 - 1.0 V If you make the air/fuel ratio racing the rich by racing the engine engine repeatedly, a normal oxy- gen sensor will output a voltage of 0.6 - 1.0 V.
Page 90 13A-90 MPI <4G6> - On-vehicle Service <Oxygen sensor (rear)> Equipment side connector 1. Disconnect the oxygen sensor connector and connect the special tool (test harness set) to the connector on Oxygen the oxygen sensor side. sensor 2. Make sure that there is continuity (11 - 18 W at 20_C) (rear) between terminal 3 and terminal 4 on the oxygen sensor connector.
Page 91: Multipoint Fuel Injection (Mpi) <6A1
13A-91 MPI <6A1> - General/General Information MULTIPOINT FUEL INJECTION (MPI) <6A1> GENERAL OUTLINE OF CHANGES Due to the changes shown below, the service procedures regarding the different description from the previous version have been established. On-board Diagnostics System has been adopted to expand the diagnostic items and to change diagnosis code numbering system.
Page 92: Multipoint Fuel Injection System Diagram
13A-92 MPI <6A1> - General Information MULTIPOINT FUEL INJECTION SYSTEM DIAGRAM L1 Left bank oxygen sensor (front) Engine- z1 Injector L2 Right bank oxygen sensor (front) z2 Purge control solenoid valve L3 Air flow sensor z3 Idle speed control servo...
Page 93: Service Specifications
13A-93 MPI <6A1> - Service Specifications SERVICE SPECIFICATIONS Items Standard value Oxygen sensor output voltage V 0.6 - 1.0 Oxygen sensor heater coil resistance front (at 20_C) W 4.5 - 8.0 Oxygen sensor heater coil resistance rear (at 20_C) W 11 - 18...
Page 94: Troubleshooting
Oxygen sensor heater (front) <Bank 2 sensor 1> P0156 Oxygen sensor (rear) <Bank 2 sensor 2> P0161 Oxygen sensor heater (rear) <Bank 2 sensor 2> P0170 Abnormal fuel system (Bank 1) P0173 Abnormal fuel system (Bank 2) P0201 No. 1 injector system P0202 No.
Page 95 13A-95 MPI <6A1> - Troubleshooting Code No. Diagnosis item P0300L Ignition coil (power transistor) system P0301 No. 1 cylinder misfire detected P0302 No. 2 cylinder misfire detected P0303 No. 3 cylinder misfire detected P0304 No. 4 cylinder misfire detected P0305 No.
Page 96 13A-96 MPI <6A1> - Troubleshooting METHOD OF READING AND ERASING DIAGNOSIS CODES Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points. DIAGNOSIS USING DIAGNOSIS 2 MODE 1. Switch the diagnosis mode of the engine control unit to DIAGNOSIS 2 mode using the MUT-II. 2.
Page 97 Display item list Data item Unit Engine coolant temperature sensor Engine speed r/min Vehicle speed km/h Long-term fuel compensation (long-term fuel trim) Short-term fuel compensation (short-term fuel trim) Fuel control condi- Open loop tion Closed loop Open loop owing to OL-DRV.
Page 98: Fail-Safe Function Reference Table
(front) Right bank oxygen Performs the feedback control (closed loop control) of the air/fuel ratio by using only the sensor (rear) and left signal of the oxygen sensor (front) installed on the front of the catalytic converter. bank oxygen sensor...
Page 99: Inspection Chart For Diagnosis Codes
13A-121 P0156 Oxygen sensor (rear) <Bank 2 sensor 2> 13A-122 P0161 Oxygen sensor heater (rear) <Bank 2 sensor 2> 13A-124 P0170 Abnormal fuel system (Bank 1) 13A-125 P0173 Abnormal fuel system (Bank 2) 13A-126 P0201 No. 1 injector system 13A-127 P0202 No.
Page 100 13A-100 MPI <6A1> - Troubleshooting Code No. Diagnosis item Reference page P0403 EGR valve system 13A-133 P0421 Catalyst malfunction (Bank 1) 13A-134 P0431 Catalyst malfunction (Bank 2) 13A-135 P0443 Purge control solenoid valve system 13A-136 P0500 Vehicle speed sensor system 13A-137 P0505 Idle speed control system...
Page 101: Inspection Procedure Classified By Diagnosis Code
13A-101 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE Code No. P0100 Air flow sensor system Probable cause Range of Check D Malfunction of air flow sensor D Engine speed: 500 r/min or more D Open or short circuit in air flow sensor circuit or Set Conditions loose connector contact D The sensor output frequency is 3.3 Hz or less for four seconds.
Page 102 13A-102 MPI <6A1> - Troubleshooting From the previous page Check the following connector: Repair Measure at air flow sensor connector C-168 B-12. D Use test harness (MB991709) to connect the connector, and Repair measure at the pick-up harness. Check the harness between the air D Selector lever position: P flow sensor and the engine-ECU.
Page 103 13A-103 MPI <6A1> - Troubleshooting Code No. P0105 Barometric pressure sensor system Probable cause Range of Check D Malfunction of barometric pressure sensor D Two seconds have passed since the ignition switch is turned ON or the D Open or short circuit in barometric pressure engine starting process is completed.
Page 104 13A-104 MPI <6A1> - Troubleshooting From the previous page Measure at engine-ECU connector Check the following connector: Repair C-167. C-167 D Measure the voltage at the engine-ECU terminal. D Ignition switch: ON Check the harness between the air D Voltage between terminal 51 and flow sensor and the engine-ECU, earth and repair if necessary.
Page 105 13A-105 MPI <6A1> - Troubleshooting Code No. P0110 Intake air temperature sensor system Probable cause Range of Check D Malfunction of intake air temperature sensor D Two seconds have passed since the ignition switch is turned ON or the D Open or short circuit in intake air temperature engine starting process is completed.
Page 106 13A-106 MPI <6A1> - Troubleshooting From the previous page Repair Measure at air flow sensor connector Check the following connector: B-12. C-167 D Use the test harness (MB991709) to connect only terminals 5 and 6, and then measure at the Check the harness between the air pickup harness.
Page 107 13A-107 MPI <6A1> - Troubleshooting MUT-II Data list Transient malfunction (Refer to GROUP 00 - Points to 21 Engine coolant temperature sensor Note for Intermittent Malfunctions.) OK: When the engine is cold, the temperature is roughly the same as ambient tem- perature.
Page 108 13A-108 MPI <6A1> - Troubleshooting From the previous page Repair Measure at engine coolant Check the engine coolant temperature sensor connector B-33. temperature sensor. D Use test harness (MB991658) to (Refer to P.13A-193*.) connect the connector, and measure at the pick-up harness. Repair D Ignition switch: ON Check the following connector:...
Page 109 13A-109 MPI <6A1> - Troubleshooting Code No. P0120 Throttle position sensor system Probable cause Range of Check D Malfunction of throttle position sensor D Ignition switch: ON D Improper connector contact, open circuit or D Excluding 60 seconds after the ignition switch is turned ON or immediately short-circuited harness wire after the engine starts.
Page 110 13A-110 MPI <6A1> - Troubleshooting From the previous page (1) NG Measure at throttle position sensor Check the following connector: Repair (3) NG connector B-07. C-167 D Use test harness (MB991536) to connect the connector, and measure at the pick-up harness. Check the harness wire between the D Ignition switch: ON throttle position sensor and the...
Page 111 13A-111 MPI <6A1> - Troubleshooting Repair Check the following connectors: B-106, B-108 Measure at right bank oxygen Check the following connector: Repair sensor (front) connector B-108. C-167 D Disconnect the connector and measure at the harness side. D Resistance between terminal 1 Check the harness wire between the Repair and earth...
Page 112 13A-112 MPI <6A1> - Troubleshooting From the previous page (1) NG Measure at left bank oxygen sensor Check the following connector: Repair (front) connector B-106. C-167 D Use the test harness (MD998464) to connect the connector, and measure at the Check the harness wire between the pick-up harness side.
Page 113 Range of Check D Engine speed is 3,000 r/min or less D During driving D During air/fuel ratio feedback control Set Conditions D The right bank oxygen sensor (front) output frequency is five or less per 12 seconds on average.
Page 114 13A-114 MPI <6A1> - Troubleshooting Repair Check the following connector: B-108 Measure at right bank oxygen Check the following connector: Repair sensor (front) connector B-108. C-167 D Disconnect the connector and measure at the harness side. D Resistance between terminal 1 Check the harness wire between the Repair and earth...
Page 115: Code
13A-115 MPI <6A1> - Troubleshooting Code No. P0135 Oxygen sensor heater (front) system Probable cause <Bank 1 sensor 1> Range of Check D Malfunction of right bank oxygen sensor heater D The engine coolant temperature is approx. 20_C or more. (front) D The oxygen sensor heater (front) remains on.
Page 116 13A-116 MPI <6A1> - Troubleshooting Code No. P0136 Oxygen sensor (rear) system <Bank 1 Probable cause sensor 2> Range of Check D Malfunction of right bank oxygen sensor (rear) D Three minutes have been passed since the engine has been started. D Open or short circuit in the right bank oxygen D The engine coolant temperature is approx.
Page 117 13A-117 MPI <6A1> - Troubleshooting Repair Check the following connector: B-109 Check the following connector: Repair Measure at right bank oxygen C-167 sensor (rear) connector B-109. D Disconnect the connector and measure at the harness side. D Resistance between terminal 1 Repair Check the harness wire between the and earth...
Page 118 13A-118 MPI <6A1> - Troubleshooting Code No. P0141 Oxygen sensor heater (rear) system Probable cause <Bank 1 sensor 2> Range of Check D Malfunction of right bank oxygen sensor heater D The engine coolant temperature is approx. 20_C or more. (rear) D The oxygen sensor heater (rear) remains on.
Page 119 Range of Check D Engine speed is 3,000 r/min or less D During driving D During air/fuel ratio feedback control Set Conditions D The left bank oxygen sensor (front) output frequency is five or less per 12 seconds on average.
Page 120 13A-120 MPI <6A1> - Troubleshooting Repair Check the following connector: B-106 Measure at left bank oxygen sensor Check the following connector: Repair (front) connector B-106. C-167 D Disconnect the connector and measure at the harness side. D Resistance between terminal 1 Check the harness wire between the Repair and earth...
Page 121 13A-121 MPI <6A1> - Troubleshooting Code No. P0155 Oxygen sensor heater (front) system Probable cause <Bank 2 sensor 1> Range of Check D Malfunction of left bank oxygen sensor heater D The engine coolant temperature is approx. 20_C or more. (front) D The oxygen sensor heater (front) remains on.
Page 122 13A-122 MPI <6A1> - Troubleshooting Code No. P0156 Oxygen sensor (rear) system Probable cause <Bank 2 sensor 2> Range of Check D Malfunction of left bank oxygen sensor (rear) D Three minutes have been passed since the engine has been started. D Open or short circuit in the left bank oxygen D The engine coolant temperature is approx.
Page 123 13A-123 MPI <6A1> - Troubleshooting Repair Check the following connector: B-107 Check the following connector: Repair Measure at left bank oxygen sensor C-167 (rear) connector B-107. D Disconnect the connector and measure at the harness side. D Resistance between terminal 1 Repair Check the harness wire between the and earth...
Page 124 13A-124 MPI <6A1> - Troubleshooting Code No. P0161 Oxygen sensor heater (rear) system Probable cause <Bank 2 sensor 2> Range of Check D Malfunction of left bank oxygen sensor heater D The engine coolant temperature is approx. 20_C or more. (rear) D The oxygen sensor heater (rear) remains on.
Page 125 D Malfunction of fuel supply system Set Conditions D Malfunction of right bank oxygen sensor (front) D Ten seconds or more have been passed while the fuel injection amount D Malfunction of intake air temperature sensor compensation value is too low.
Page 126 D Malfunction of fuel supply system Set Conditions D Malfunction of left bank oxygen sensor (front) D Ten seconds or more have been passed while the fuel injection amount D Malfunction of intake air temperature sensor compensation value is too low.
Page 127 13A-127 MPI <6A1> - Troubleshooting Code No. P0201 No. 1 injector system Probable cause Code No. P0202 No. 2 injector system Code No. P0203 No. 3 injector system Code No. P0204 No. 4 injector system Code No. P0205 No. 5 injector system Code No.
Page 128 Check the harness wire between the engine-ECU and the injector Repair connector. MUT-II Data list 81 Long-term fuel compensation (bank 1) (Refer to P.13A-176.) Check the abnormal fuel system (bank 1) MUT-II Data list (Refer to P.13A-125, INSPECTION PROCEDURE FORDIAGNOS- 82 Short-term fuel compensation (bank 1) (Refer to P.13A-176.)
Page 129 13A-129 MPI <6A1> - Troubleshooting Code No. P0301 No. 1 cylinder misfire detected Probable cause Code No. P0302 No. 2 cylinder misfire detected Code No. P0303 No. 3 cylinder misfire detected Code No. P0304 No. 4 cylinder misfire detected Code No. P0305 No. 5 cylinder misfire detected Code No.
Page 130 13A-130 MPI <6A1> - Troubleshooting Code No. P0325 Detonation sensor system Probable cause Range of Check D Malfunction of the detonation sensor D Engine: Two seconds after the engine has been started D Open or short circuit in the detonation sensor Set Conditions circuit or loose connector contact D Changes in sensor output voltage (detonation sensor peak voltage per 1/3...
Page 131 13A-131 MPI <6A1> - Troubleshooting Intermittent malfunction MUT-II Data list (Refer to GROUP 00 - Points to 22 Crank angle sensor Note for Intermittent Malfunctions.) OK: Refer to P.13A-176, DATA LIST REFERENCE TABLE. Repair Check the following connector: B-77 (1) NG Measure at the crank angle sensor Check the harness between the connector B-77.
Page 132 13A-132 MPI <6A1> - MPI <6A1> - Troubleshooting Troubleshooting Code No. P0340 Top dead centre sensor system Probable cause Range of Check D Malfunction of the camshaft position sensor D After the engine was started D Open or short circuit in the camshaft position Set Conditions sensor circuit or loose connector contact.
Page 133 13A-133 MPI <6A1> - Troubleshooting Code No. P0403 EGR control solenoid valve system Probable cause Range of Check D Malfunction of the EGR control solenoid valve D Ignition switch: ON D Open or short circuit in the EGR control solenoid D Battery voltage is 10 V or more.
Page 134 D Malfunction of the right bank oxygen sensor (front) D During driving D Malfunction of the right bank oxygen sensor (rear) D During air/fuel ratio feedback control D Malfunction of engine-ECU Set Conditions D The ratio between the right bank oxygen sensor (rear) and the right bank oxygen sensor (front) output frequencies reaches 0.8 per 12 seconds on...
Page 135 D Malfunction of the left bank oxygen sensor (front) D During driving D Malfunction of the left bank oxygen sensor (rear) D During air/fuel ratio feedback control D Malfunction of engine-ECU Set Conditions D The ratio between the left bank oxygen sensor (rear) and the left bank oxygen sensor (front) output frequencies reaches 0.8 per 12 seconds on...
Page 136 13A-136 MPI <6A1> - Troubleshooting Code No. P0443 Purge control solenoid valve system Probable cause Range of Check D Malfunction of the purge control solenoid valve D Ignition switch: ON D Open or short circuit in the purge control solenoid D Battery voltage is 10 V or more.
Page 137 13A-137 MPI <6A1> - Troubleshooting Code No. P0500 Vehicle speed sensor system Probable cause Range of Check D Malfunction of the vehicle speed sensor D Engine: Two seconds after the engine was started D Open or short circuit in the vehicle speed sensor D Idle switch: OFF circuit or loose connector contact D Engine speed: 3,000 r/min or more...
Page 138 13A-138 MPI <6A1> - Troubleshooting MUT-II Self-Diag code Refer P.13A-99, INSPECTION Is any diagnosis code other than No. CHART FOR DIAGNOSIS CODES. P0505 output? Check intake air hose and intake Repair manifold for air intake. Check the throttle body (around the Clean around the throttle valve.
Page 139 13A-139 MPI <6A1> - Troubleshooting Code No. P0510 Idle position switch system Probable cause Check Area D Malfunction of idle position switch D Throttle position sensor output voltage is 2.0 V or more. D Open or shorted idle position switch circuit, or Judgment Criteria loose connector.
Page 140 13A-140 MPI <6A1> - Troubleshooting Code No. P0551 Power steering fluid pressure switch Probable cause system Check Area D Power steering fluid pressure switch failed. D Intake air temperature is - 10_C or higher. D Open or shorted power steering fluid pressure D Barometric pressure is 76 kPa or higher.
Page 141 13A-141 MPI <6A1> - Troubleshooting Code No. P1101 Vacuum control solenoid valve system Probable cause <Vehicles with TCL and vehicles with ASC> Range of Check D Malfunction of the vacuum control solenoid valve D Ignition switch: ON D Improper connector contact, open circuit...
Page 142 13A-142 MPI <6A1> - Troubleshooting Code No. P1102 Ventilation control solenoid valve system Probable cause <Vehicles with TCL and vehicles with ASC> Range of Check D Malfunction of the ventilation control solenoid valve D Ignition switch: ON D Improper connector contact, open circuit...
Page 143 13A-143 MPI <6A1> - Troubleshooting Code No. P1500 Alternator FR terminal system Probable cause Range of Check D Open circuit in alternator FR terminal circuit D Engine speed: 50 r/min or more D Malfunction of engine-ECU Set Conditions D Input voltage from the alternator FR terminal is system voltage for 20 seconds.
Page 144 13A-144 MPI <6A1> - Troubleshooting Code No. 1600 Communication wire with A/T-ECU system Probable cause <A/T> Range of Check D Malfunction of the harness wire and the connector D 60 seconds or more have passed immediately after engine was started. D Malfunction of the engine-ECU D Engine speed is approx.
Page 145: Inspection Chart For Trouble Symptoms
13A-145 MPI <6A1> - Troubleshooting INSPECTION CHART FOR TROUBLE SYMPTOMS Trouble symptom Inspection Reference page procedure Communication Communication with all systems is not possible. 13A-146 with MUT-II is Communication with engine-ECU only is not possible. 13A-146 impossible. Engine warning The engine warning lamp does not illuminate right after the 13A-147 lamp and ignition switch is turned to the ON position.
Page 146: Inspection Procedure For Trouble Symptoms
13A-146 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS INSPECTION PROCEDURE 1 Communication with MUT-II is not possible. Probable cause (Communication with all systems is not possible.) The cause is probably a defect in the power supply system (including earth) for the D Malfunction of the connector diagnosis line.
Page 147 13A-147 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE 3 The engine warning lamp does not illuminate right after Probable cause the ignition switch is turned to the ON position. Because there is a burnt-out bulb, the engine-ECU causes the engine warning lamp D Burnt-out bulb to illuminate for five seconds immediately after the ignition switch is turned to ON.
Page 148 D Malfunction of the fuel pump system In addition, foreign materials (water, kerosene, etc.) may be mixed with the fuel. D Malfunction of the injectors D Malfunction of the engine-ECU...
Page 149 D Check if the injectors are clogged. D Check the compression pressure. D Check fuel lines for clogging. D Check if foreign materials (water, alcohol, etc.) got into fuel. NOTE: Refer to the ’97 GALANT Workshop Manual (Pub. No. PWDE9611)
Page 150 OK: Approx. 5_BTDC Check the following items. D Check the ignition coil, spark plugs, spark plug cables. D Check if the injectors are clogged. D Check the compression pressure. D Check if foreign materials (water, alcohol, etc.) got into fuel.
Page 151 INSPECTION PROCEDURE 8 Unstable idling (Rough idling, hunting) Probable cause In cases as the above, the cause is probably that the ignition system, air/fuel mixture, D Malfunction of the ignition system idle speed control (ISC) or compression pressure is defective.
Page 152 D Check the ignition coil, spark plugs, spark plug cables. D Check the purge control system. D Check the EGR control system. D Check the compression pressure. D Check if foreign materials (water, alcohol, etc.) got into fuel. NOTE: Refer to the ’97 GALANT Workshop Manual (Pub. No. PWDE9611)
Page 153 13A-153 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE 9 Idling speed is high. (Improper idling speed) Probable cause In such cases as the above, the cause is probably that the intake air volume during D Malfunction of the ISC system idling is too great. D Malfunction of the throttle body MUT-II Self-Diag code Refer to P.13A-99, INSPECTION CHART FOR DIAGNOSIS...
Page 154 13A-154 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE 10 Idling speed is low. (Improper idling speed) Probable cause In cases such as the above, the cause is probably that the intake air volume during D Malfunction of the ISC system idling is too small. D Malfunction of the throttle body MUT-II Self-Diag code Refer to P.13A-99, INSPECTION CHART FOR DIAGNOSIS...
Page 155 MUT-II Actuator test INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.) 10 EGR control solenoid valve (Refer to P.13A-183.) Check the fuel pressure. (Refer to P.13A-189*.) Check the ignition timing. Check that the crank angle sensor is installed properly. (Refer to GROUP 11A - On-vehicle Service.) Check the following items.
Page 156 When the engine is hot, it stalls at idling. (Die out) Probable cause In such cases as the above, the cause is probably that ignition system, air/fuel mixture, D Malfunction of the ignition system idle speed control (ISC) or compression pressure is defective.
Page 157 D Check the ignition coil, spark plugs, spark plug cables. D Check if the injectors are clogged. D Check the compression pressure. D Check if foreign materials (water, alcohol, etc.) got into fuel. NOTE: Refer to the ’97 GALANT Workshop Manual (Pub. No. PWDE9611)
Page 158 In cases such as the above, the cause is probably misfiring due to a weak spark, D Drawing air into intake system or an inappropriate air/fuel mixture when the accelerator pedal is depressed. D Malfunction of the ignition system MUT-II Self-Diag code Refer to P.13A-99, INSPECTION CHART FOR DIAGNOSIS...
Page 159 INSPECTION PROCEDURE 15 Hesitation, sag or stumble Probable cause In cases such as the above, the cause is probably that ignition system, air/fuel mixture D Malfunction of the ignition system or compression pressure is defective. D Malfunction of air/fuel ratio control system...
Page 160 D Check the vacuum tank and vacuum actuator. D Check the EGR control system. D Check the compression pressure. D Check the fuel filter or fuel line for clogging. NOTE: Refer to the ’97 GALANT Workshop Manual (Pub. No. PWDE9611)
Page 161 13A-161 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE 16 The feeling of impact or vibration when accelerating Probable cause In cases such as the above, the cause is probably that there is an ignition leak D Malfunction of the ignition system accompanying the increase in the spark plug demand voltage during acceleration.
Page 162 Troubleshooting INSPECTION PROCEDURE 18 Poor acceleration Probable cause Defective ignition system, abnormal air-fuel ratio, poor compression pressure, etc. D Malfunction of the ignition system are suspected. D Malfunction of air/fuel ratio control system D Malfunction of the fuel supply system...
Page 163 D Check the operation of the throttle valve. D Check the vacuum tank and vacuum actuator. D Check the compression pressure. D Check the fuel filter or fuel line for clogging. D Broken air intake hose D Clogged air cleaner NOTE: Refer to the ’97 GALANT Workshop Manual (Pub.
Page 164 Troubleshooting INSPECTION PROCEDURE 19 Surge Probable cause Defective ignition system, abnormal air-fuel ratio, etc. are suspected. D Malfunction of the ignition system D Malfunction of air-fuel ratio control system D Malfunction of the EGR control solenoid valve system MUT-II Self-Diag code Refer to P.13A-99, INSPECTION CHART FOR DIAGNOSIS...
Page 165 2,500 r/min D Broken vacuum hose D PCV valve does Check the fuel pressure. (Refer to P.13A-189*.) not operate. 2. Check the injector for blockage. Check the following items. D Check the ignition coil, spark plugs, spark plug cables.
Page 166 TION PROCEDURE FOR DIAGNOSIS CODE P0325.) compared to when the detonation sensor connector is connected. Check the following items. D Spark plugs D Check if foreign materials (water, alcohol, etc.) got into fuel. INSPECTION PROCEDURE 21 Dieseling Probable cause Fuel leakage from injectors is suspected.
Page 167 OK: Repeat 0 - 400 mV and 600 - 1,000 mV alternately when Check trouble symptom. idling Check the fuel pressure. (Refer to P.13A-189*.) Check the following items. D Check the injectors for operation sound. D Check the injectors for fuel leakage.
Page 168 13A-168 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE 23 Low alternator output voltage (approx. 12.3 V) Probable cause The alternator may be defective, or malfunctions, which are listed in the right column, D Malfunction of charging system may be suspected. D Short circuit in harness between alternator G terminal and engine-ECU D Malfunction of engine-ECU Check the following connectors:...
Page 169 13A-169 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE 25 Fans (radiator fan, A/C condenser fan) are inoperative Probable cause The engine-ECU outputs a duty signal to the fan controller depending on the D Malfunction of the fan motor relay engine coolant temperature, vehicle speed, and air conditioner switch condition. D Malfunction of the fan motor Based on this signal, the fan controller controls the radiator fan and condenser D Malfunction of the fan controller...
Page 170 13A-170 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE 26 Engine-ECU power supply and earth circuit system Probable cause The engine-ECU may be defective, or that one of the malfunctions listed at right D Improper connector contact, open circuit has occurred. short-circuited harness wire in the engine-ECU power supply circuit.
Page 171 13A-171 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE 27 Power supply system and ignition switch-IG system Probable cause When an ignition switch ON signal is input to the engine-ECU, the engine-ECU turns D Malfunction of the ignition switch the control relay ON. This causes battery voltage to be supplied to the engine-ECU, D Malfunction of the control relay injectors and air flow sensor.
Page 172 Probable cause The engine-ECU turns the control relay ON when the engine is cranking or running, D Malfunction of the fuel pump relay and this supplies power to drive the fuel pump. D Malfunction of the fuel pump D Improper...
Page 173 D Malfunction of the ignition switch engine is cranking. D Malfunction of the inhibitor switch <A/T> The engine-ECU uses this signal to carry out functions such as fuel injection D Open circuit or short-circuited harness wire of the control during starting.
Page 174 13A-174 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE 30 A/C switch and A/C relay system Probable cause When an A/C ON signal is input to the engine-ECU, the engine-ECU carries out D Malfunction of A/C control system control of the idle speed control (ISC) servo, and also operates the A/C compressor D Malfunction of A/C switch magnetic clutch.
Page 175 13A-175 MPI <6A1> - Troubleshooting (1) NG Measure at the distributor connectors B-42. Check the following Repair D Disconnect the connector and measure at the harness side. connectors:C-92,C-131 (1) Voltage between 1 and earth (Ignition switch: ON) OK: System voltage (2) NG (2) Continuity between 4 and earth Check trouble symptom.
Page 176: Data List Reference Table
200 mV or less Code No. 13A-113 oxygen warmed up engine is suddenly P0130 sensor decelerated Air/fuel mixture is (front) made leaner when made leaner when decelerating, and is When engine is 600 - 1,000 mV made richer when suddenly raced racing.
Page 177 13A-177 MPI <6A1> - Troubleshooting Item Inspection Inspection contents Normal condition Inspection Reference item procedure page Intake air Ignition switch: ON When intake air - 20_C Code No. 13A-105 tempera- or with engine temperature is P0110 ture sensor running - 20_C When intake air temperature is 0_C When intake air...
Page 178 13A-178 MPI <6A1> - Troubleshooting Item Inspection Inspection contents Normal condition Inspection Reference item procedure page Crank Engine: Compare the engine Accord Code No. 13A-130 angle sen- Cranking speed readings on P0335 Tachometer: the tachometer and Connected the MUT-II. Engine: Idling When engine 1,300 - 1,500 rpm Idle position...
Page 179 Engine: After hav- When at 4,000 200 mV or less Code No. 13A-119 oxygen ing warmed up r/min, engine is P0150 sensor Air/fuel mixture is suddenly deceler- (front) made leaner ated when decelerat- when decelerat- ing, and is made When engine is...
Page 180 13A-180 MPI <6A1> - Troubleshooting Item Inspection Inspection contents Normal condition Inspection Reference item procedure page Engine: Cranking When engine 23 - 80 ms Injectors* coolant temperature is 0_C (injection is carried out for all cylinders simulta- neously) When engine 12 - 40 ms coolant temperature is 20_C...
Page 181 Drive with throttle widely open Long-term Engine: Warm, 2,500 r/min without any load - 12.5 - 12.5 % Code No. 13A-125 fuel com- (during closed loop) P0170 pensation (bank 1) Short-term Engine: Warm, 2,500 r/min without any load - 16.8 - 16.8 % Code No.
Page 182 13A-182 MPI <6A1> - Troubleshooting Item Inspection Inspection contents Normal condition Inspection Reference item procedure page Oxygen Engine: Idling Code No. 13A-113 sensor After warm-up P0130 Sudden racing 0.6 - 1.0 V (Bank 1, sensor 1) 2,500 r/min 0.4 V or less and 0.6 - 1.0 V alternates Oxygen...
Page 183: Actuator Test Reference Table
P0201, Engine is idling (becomes unsta- P0202, Cut fuel to No. ble). P0203, (Cut the fuel supply to each 2 injector P0204, injector in turn and check P0205, cylinders which don’t affect Cut fuel to No. P0206 idling.) 3 injector Cut fuel to No.
Page 184 13A-184 MPI <6A1> - Troubleshooting Item Inspection Drive contents Inspection contents Normal condition Inspection Reference item procedure page Basic igni- Set to ignition Engine: Idling 5_BTDC tion timing timing adjust- Timing light is set ment mode Fan con- Drive the fan Ignition switch: ON Radiator fan and Procedure...
Page 185: Check At The Engine-Ecu Terminals
13A-185 MPI <6A1> - Troubleshooting CHECK AT THE ENGINE-ECU TERMINALS TERMINAL VOLTAGE CHECK CHART Engine-ECU Connector Terminal Arrangement Terminal Check item Check condition (Engine condition) Normal condition No. 1 injector While engine is idling after having From 11 - 14 V, warmed up, suddenly depress the momentarily drops No.
Page 186 System voltage or A/C switch: OFF ® ON momentarily 6 V or (A/C compressor is operating) more ® 0 - 3 V Fuel pump relay Ignition switch: ON System voltage Engine: Idle speed 0 - 3 V Purge control solenoid valve...
Page 187 13A-187 MPI <6A1> - Troubleshooting Terminal Check item Check condition (Engine condition) Normal condition A/C switch 2 Engine: When A/C is 0 - 3 V Idling MAX. COOL Outside air condition (when tempera- the load by A/C ture: 25_C is high) or more When A/C is System voltage...
Page 188 13A-188 MPI <6A1> - Troubleshooting Terminal Check item Check condition (Engine condition) Normal condition Right bank oxygen sensor heater (front) Engine: Idling 0 - 3 V Engine: 3,500 r/min System voltage Right bank oxygen sensor heater (rear) Engine: Idling 0 - 3 V Engine: 3,500 r/min System voltage Backup power supply...
Page 189 13A-189 MPI <6A1> - Troubleshooting Terminal Check item Check condition (Engine condition) Normal condition Air flow sensor Engine: Idle speed 2.2 - 3.2 V Engine r/min: 2,500 r/min Inhibitor switch <A/T> Ignition switch: Set selector 0 - 3 V lever to P or N Set selector 8 - 14 V lever to Other...
Page 190 13A-190 MPI <6A1> - Troubleshooting CHECK CHART FOR RESISTANCE AND CONTINUITY BETWEEN TERMINALS Engine-ECU Harness Side Connector Terminal Arrangement Terminal No. Inspection item Normal condition (Check condition) 1 - 47 No. 1 injector 13 - 16 W (At 20_C) 9 - 47 No.
Page 191 13A-191 MPI <6A1> - Troubleshooting Terminal No. Inspection item Normal condition (Check condition) 62 - 49 Intake air temperature 5.3 - 6.7 kW (When intake air temperature is 0_C) sensor 2.3 - 3.0 kW (When intake air temperature is 20_C) 1.0 - 1.5 kW (When intake air temperature is 40_C) 0.30 - 0.42 kW (When intake air temperature is 80_C) 44 - 49...
Page 192: Inspection Procedure Using An Analyzer
13A-192 MPI <6A1> - Troubleshooting INSPECTION PROCEDURE USING AN ANALYZER Due to the change on the engine-ECU, the following describes only the inspection procedures at the engine-ECU terminals. AIR FLOW SENSOR Alternate method (Test harness not available) 1. Connect the analyzer special patterns pickup to engine-ECU terminal 61.
Page 193: On-Vehicle Service
Engine Oxygen sensor Remarks Black output voltage When 0.6 - 1.0 V If you make the air/fuel ratio racing the rich by racing the engine Blue engine repeatedly, a normal oxy- White gen sensor will output a voltage of 0.6 - 1.0 V.
Page 194 13A-194 MPI <6A1> - On-vehicle Service <Left bank oxygen sensor (rear) and Right bank Equipment side connector oxygen sensor (rear)> 1. Disconnect the oxygen sensor connector and connect the special tool (test harness set) to the connector on the oxygen sensor side. 2.
Page 195 ..... . SERVICE SPECIFICATIONS ....FUEL PUMP (HIGH PRESSURE) AND FUEL PRESSURE REGULATOR (HIGH PRESSURE) TROUBLESHOOTING .
Page 196: General
On-board Diagnostics System has been adopted to expand the diagnostic items and to change diagnosis code numbering system. Fuel pressure regulator (high-pressure) incorporate fuel pump (high-pressure) has been adopted. An ignition failure sensor has been adopted. An engine-A/T-ECU has been adopted. <Vehicles with A/T>...
Page 197 L8 Engine coolant tem- sure switch perature sensor Alternator FR terminal Auto-cruise control L9 Detonation sensor Clutch switch lamp L10 Fuel pressure sen- Small lamp switch Throttle valve con- Stop lamp switch troller L11 Oxygen sensor Brake vacuum sensor Tachometer...
Page 198: Service Specifications
13I-4 GDI - Service Specifications SERVICE SPECIFICATIONS Items Standard value Fuel pressure High-pressure side MPa 4 - 6.9 Low-pressure side kPa Approximately 324 Oxygen sensor output voltage (during revving) V 0.6 - 1.0 Oxygen sensor heater resistance (at 20_C) W Front 4.5 - 8.0...
Page 199: Troubleshooting
Oxygen sensor heater (front) system <sensor 1> P0136 Oxygen sensor (rear) system <sensor 2> P0141 Oxygen sensor heater (rear) system <sensor 2> P0170 Abnormal fuel system P0190L Abnormal fuel pressure P0201 No. 1 injector system P0202 No. 2 injector system P0203 No.
Page 200 13I-6 GDI - Troubleshooting Code No. Diagnosis item P0304 No. 4 cylinder misfire detected P0335 Crank angle sensor system P0340 Camshaft position sensor system P0403 EGR valve system P0420 Catalyst malfunction P0443 Purge control solenoid valve system P1200 Injector driver system P1220L Electronic-controlled throttle valve system P1221L...
Page 201 13I-7 GDI - Troubleshooting METHOD OF READING AND ERASING DIAGNOSIS CODES Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points. DIAGNOSIS USING DIAGNOSIS 2 MODE 1. Switch the diagnosis mode of the engine-ECU <M/T> or engine A/T-ECU <A/T> to DIAGNOSIS 2 mode using the MUT-II.
Page 202 Display item list Data item Unit Engine coolant temperature sensor Engine speed r/min Vehicle speed km/h Long-term fuel compensation (long-term fuel trim) Short-term fuel compensation (short-term fuel trim) Fuel control condi- Open loop tion Closed loop Open loop owing to OL-DRV.
Page 203 Cuts off the fuel supply to cylinders with an abnormal ignition signal. Fuel pressure sensor Controls as if the fuel pressure is 5 MPa. (If there is open or short circuit). Turns off the fuel pump relay (If the fuel pressure is excessively high).
Page 204 <M/T> or Suspends lean burn operation. engine-A/T-ECU <A/T> Cuts the fuel supply when the engine speed reaches 3,000 r/min or more. Suspends the cruise-control. Communication error between the throttle valve controller and the engine-ECU <M/T> or engine-A/T-ECU <A/T>: Suspends lean burn operation.
Page 205 Oxygen sensor heater (front) system <sensor 1> 13I-27 P0136 Oxygen sensor (rear) system <sensor 2> 13I-28 P0141 Oxygen sensor heater (rear) system <sensor 2> 13I-30 P0170 Abnormal fuel system 13I-31 P0190L Abnormal fuel pressure 13I-33 P0201 No. 1 injector system 13I-34 P0202 No.
Page 206 13I-12 GDI - Troubleshooting Code No. Diagnosis item Reference page P1221L Throttle valve position feedback system 13I-57 P1223L Communication line with the throttle valve controller 13I-58 P1224L Throttle valve control servo motor (motor 1st phase malfunction) system 13I-59 P1225L Accelerator pedal position sensor (2nd channel) system 13I-60 P1228L Throttle valve control servo motor (motor 2nd phase malfunction) system...
Page 207 13I-13 GDI - Troubleshooting INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE Code No. P0100 Air flow sensor system Probable cause Range of Check D Malfunction of air flow sensor D Engine speed: 500 r/min or more D Open or short circuit in air flow sensor circuit or Set Conditions loose connector contact D The sensor output frequency is 3.3 Hz or less for four seconds.
Page 208 13I-14 GDI - Troubleshooting From the previous page Repair Check the following connectors: Measure at air flow sensor connector C-163 <M/T>, C-177 <A/T> B-12. D Use test harness (MB991709) to connect the connector, and measure at the pick-up harness. Check the harness between the air Repair D Ignition switch: ON flow sensor and the engine-ECU...
Page 209 13I-15 GDI - Troubleshooting Code No. P0105 Barometric pressure sensor system Probable cause Range of Check D Malfunction of barometric pressure sensor D Two seconds have passed since the ignition switch is turned ON or the D Open or short circuit in barometric pressure engine starting process is completed.
Page 210 13I-16 GDI - Troubleshooting From the previous page (1) NG Measure at air flow sensor connector Check the following connectors: Repair (3) NG B-12. (C-163, C-164) <M/T>, C-175 <A/T>, D Connect connector terminals No. C-47 <RHD> 1, No. 2 and No. 5 only by using test harness (MB991709), and measure at the pick-up harness.
Page 211 13I-17 GDI - Troubleshooting Code No. P0110 Intake air temperature sensor system Probable cause Range of Check D Malfunction of intake air temperature sensor D Two seconds have passed since the ignition switch is turned ON or the D Open or short circuit in intake air temperature engine starting process is completed.
Page 212 13I-18 GDI - Troubleshooting From the previous page Measure at air flow sensor connector Check the following connectors: Repair B-12. (C-163, C-164) <M/T>, (C-175, D Use the test harness (MB991709) C-176) <A/T> to connect only terminals 5 and 6, and then measure at the pick-up harness.
Page 213 13I-19 GDI - Troubleshooting MUT-II Data list Transient malfunction 21 Engine coolant temperature (Refer to GROUP 00 - Points to sensor Note for Intermittent Malfunctions.) OK: When the engine is cold, the temperature is roughly the same as ambient tem- perature.
Page 214 13I-20 GDI - Troubleshooting From the previous page Repair Check the engine coolant Measure at engine coolant temperature sensor connector B-33. temperature sensor. D Use test harness (MB991658) to (Refer to P.13I-107*.) connect the connector, and measure at the pick-up harness. D Ignition switch: ON Repair Check the following connectors:...
Page 215 13I-21 GDI - Troubleshooting Code No. P0120 Throttle position sensor (1st channel) Probable cause system The throttle valve controller judges a malfunction, and then transmit the result to D Malfunction of throttle position sensor the engine-ECU <M/T> or engine-A/T-ECU <A/T>. D Open or short circuit in the throttle position sensor Range of Check (1st channel) circuit or loose connector contact...
Page 216 13I-22 GDI - Troubleshooting From the previous page (1) NG Measure at throttle position sensor Repair Check the following connector: (3) NG connector B-07. C-160 D Use test harness (MB991536) to connect the connector, and measure at the pick-up harness. Check the harness wire between the D Ignition switch: ON throttle position sensor and the...
Page 217 13I-23 GDI - Troubleshooting Code No. P0125 Feedback system Probable cause Range of Check D Malfunction of oxygen sensor (front) D The engine coolant temperature is approx. 80_C or more. D Open or short circuit in the oxygen sensor (front) D During stoichiometric feedback control circuit or loose connector contact D The vehicle is not being decelerated.
Page 218 13I-24 GDI - Troubleshooting Repair Check the following connector: C-46 Check the following connectors: Repair Measure at oxygen sensor (front) C-163 <M/T>, C-175 <A/T> connector C-46. D Disconnect the connector and measure at the harness side. Check the harness wire between the Repair D Resistance between terminal 2 oxygen sensor (front) and the...
Page 219 (front) inside the engine-ECU <M/T> or engine-A/T-ECU <A/T>. Range of Check D Engine speed is 3,000 r/min or less D During driving D During air/fuel ratio feedback control Set Conditions D The oxygen sensor (front) output frequency is five or less per 12 seconds on average.
Page 220 13I-26 GDI - Troubleshooting Repair Check the following connector: C-46 Check the following connectors: Repair Measure at oxygen sensor (front) C-163 <M/T>, C-175 <A/T> connector C-46. D Disconnect the connector and measure at the harness side. Check the harness wire between the Repair D Resistance between terminal 2 oxygen sensor (front) and the...
Page 221 13I-27 GDI - Troubleshooting Code No. P0135 Oxygen sensor heater (front) system Probable cause <sensor 1> Range of Check D Malfunction of oxygen sensor heater (front) D The engine coolant temperature is approx. 20_C or more. D Open or short circuit in the oxygen sensor heater D The oxygen sensor heater (front) remains on.
Page 222 D When the oxygen sensor (front) is in good condition. Set Conditions D When the air/fuel ratio is rich, the oxygen sensor (front) output voltage is 0.5 V or more, the oxygen sensor (rear) output voltage is less than 0.1 V, and...
Page 223 13I-29 GDI - Troubleshooting Repair Check the following connector: C-85 Measure at oxygen sensor (rear) Repair Check the following connectors: connector C-85. C-163 <M/T>, C-175 <A/T> D Disconnect the connector and measure at the harness side. D Resistance between terminal 2 Repair Check the harness wire between the and earth...
Page 224 13I-30 GDI - Troubleshooting Code No. P0141 Oxygen sensor heater (rear) system Probable cause <sensor 2> Range of Check D Malfunction of oxygen sensor heater (rear) D The engine coolant temperature is approx. 20_C or more. D Open or short circuit in the oxygen sensor heater D The oxygen sensor heater (rear) remains on.
Page 225 D Malfunction of oxygen sensor (front) Set Conditions D Malfunction of intake air temperature sensor D Ten seconds or more have been passed while the fuel injection amount D Malfunction of barometric pressure sensor compensation value is too low. D Malfunction of air flow sensor D Malfunction of engine-ECU <M/T>...
Page 226 Check the fuel pressure between the Repair fuel pump (low-pressure) and the fuel pump (high-pressure) (Refer to P.13I-122.) Repair Check the fuel lines for fuel leaks. Repair Check the injectors for clogging or leaks. Check the trouble symptoms. Transient malfunction (Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.)
Page 227 D Engine running Set Conditions D The fuel pressure is 6.9 MPa or more, or 2 MPa or less for four seconds. This diagnosis code will also be output when air is trapped into the D Air trapped due to poor fuel level high-pressure fuel lines (such as poor fuel level).
Page 228 D Open or short circuit in the No. 1 injector circuit or D The battery voltage is 10 V or more. loose connector contact D The fuel cut operation or the injector operation (by carrying out the Actuator D Malfunction of engine-ECU <M/T> Test) is not in progress.
Page 229 13I-35 GDI - Troubleshooting MUT-II Actuator Test Check the trouble symptoms. Transient malfunction 01 No. 1 injector (Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.) OK: The idling condition should change. Replace the injector driver. Check the trouble symptoms. Replace the engine-ECU <M/T>...
Page 230 D Open or short circuit in the No. 2 injector circuit or D The battery voltage is 10 V or more. loose connector contact D The fuel cut operation or the injector operation (by carrying out the Actuator D Malfunction of engine-ECU <M/T> Test) is not in progress.
Page 231 D Open or short circuit in the No. 3 injector circuit or D The battery voltage is 10 V or more. loose connector contact D The fuel cut operation or the injector operation (by carrying out the Actuator D Malfunction of engine-ECU <M/T> Test) is not in progress.
Page 232 D Open or short circuit in the No. 4 injector circuit or D The battery voltage is 10 V or more. loose connector contact D The fuel cut operation or the injector operation (by carrying out the Actuator D Malfunction of engine-ECU <M/T> Test) is not in progress.
Page 233 13I-39 GDI - Troubleshooting MUT-II Actuator Test Check the trouble symptoms. Transient malfunction (Refer to GROUP 00 - Points to 04 No. 4 injector Note for Intermittent Malfunctions.) OK: The idling condition should change. Replace the injector driver. Check the trouble symptoms. Replace the engine-ECU <M/T>...
Page 234 13I-40 GDI - Troubleshooting Code No. P0220 Accelerator pedal position sensor (1st Probable cause channel) system Range of Check D Malfunction of accelerator pedal position sensor D Accelerator pedal position sensor (2nd channel) is normal. (1st channel) D Communication between the engine-ECU <M/T> or engine-A/T-ECU <A/T> D Open or short circuit in the accelerator pedal and the throttle valve controller is normal.
Page 235 13I-41 GDI - Troubleshooting MUT-II Data list Check the accelerator pedal position 26 Accelerator pedal position switch switch system. (Refer to P.13I-92, (Refer to P.13I-98, DATA LIST Inspection Procedure 28.) REFERENCE TABLE.) Transient malfunction MUT-II Data list (Refer to GROUP 00 - Points to 78 Accelerator pedal position sensor Note for Intermittent Malfunctions.) (1st channel) (Refer to P.13I-98,...
Page 236 13I-42 GDI - Troubleshooting From the previous page (1), (2) NG Measure at accelerator pedal position Check the following connectors: Repair sensor connector C-172. C-164 <M/T>, C-176 <A/T>, C-81 D Connect connector terminals No. 1, No. 2 and No. 3 only by using test harness (MB991658), and Check the harness wire between measure at the pick-up harness.
Page 237 13I-43 GDI - Troubleshooting Code No. 0225 Throttle position sensor (2nd channel) Probable cause system The throttle valve controller judges a malfunction, and then transmit the result to D Malfunction of throttle position sensor (2nd the engine-ECU <M/T> or engine-A/T-ECU <A/T>. channel) Range of Check D Open or short circuit in the throttle position sensor...
Page 238 13I-44 GDI - Troubleshooting From the previous page (1), (2) NG Measure at throttle position sensor Check the following connector: Repair connector B-07. C-160 D Use test harness (MB991536) to connect the connector, and measure at the pick-up harness. Check the harness wire between D Ignition switch: ON throttle position sensor (2nd channel) (1) The voltage between terminal 1...
Page 239 13I-45 GDI - Troubleshooting Repair Check the following connectors: MUT-II Actuator Test Ignition coil connectors, which 01 No. 1 injector 02 No. 2 injector correspond to defective cylinders 03 No. 3 injector (B-01, B-11, B-89, B-104). 04 No. 4 injector OK: The idling condition should change.
Page 240 13I-46 GDI - Troubleshooting Code No. P0301 No. 1 cylinder misfire detected Probable cause Code No. P0302 No. 2 cylinder misfire detected Code No. P0303 No. 3 cylinder misfire detected Code No. P0304 No. 4 cylinder misfire detected Range of Check D Malfunction of the ignition system D The engine speed is 500 - 4,500 r/min.
Page 241 13I-47 GDI - Troubleshooting Code No. P0325 Detonation sensor system Probable cause Range of Check D Malfunction of the detonation sensor D Engine: Two seconds after the engine has been started D Open or short circuit in the detonation sensor Set Conditions circuit or loose connector contact D Changes in sensor output voltage (detonation sensor peak voltage per 1/3...
Page 242 13I-48 GDI - Troubleshooting Intermittent malfunction MUT-II Data list (Refer to GROUP 00 - Points to 22 Crank angle sensor Note for Intermittent Malfunctions.) OK: Refer to P.13I-98, DATA LIST REFERENCE TABLE. Repair Check the following connector: B-77 (1) NG Measure at the crank angle sensor Check the harness between the connector B-77.
Page 243 13I-49 GDI - Troubleshooting Code No. P0340 Camshaft position sensor system Probable cause Range of Check D Malfunction of the camshaft position sensor D After the engine was started D Open or short circuit in the camshaft position Set Conditions sensor circuit or loose connector contact.
Page 244 13I-50 GDI - Troubleshooting Repair Check the following connector: B-64 (1) NG Repair Check the following connector: Measure at camshaft position sensor connector B-64. C-31 D Disconnect the connector and measure at the harness side. (1) The voltage between terminal 3 Check the harness wire between the and earth camshaft position sensor connector...
Page 245 13I-51 GDI - Troubleshooting Code No. P0403 EGR valve system Probable cause Range of Check D Malfunction of the EGR valve D Ignition switch: OFF to ON D Open or short circuit in the EGR valve circuit or D EGR valve is in operation after the engine starting process is complete. loose connector contact Set Conditions D Malfunction of engine-ECU <M/T>...
Page 246 13I-52 GDI - Troubleshooting Measure at EGR valve connector Replace B-99. D Disconnect the connector, and measure at the EGR valve side. D The resistance between terminals 1 and 2 D The resistance between terminals 2 and 3 D The resistance between terminals 4 and 5 D The resistance between terminals 5 and 6...
Page 247 D The engine speed is 3,000 r/min or less. D Malfunction of the oxygen sensor (front) D During driving D Malfunction of the oxygen sensor (rear) D During air/fuel ratio feedback control D Malfunction of engine-ECU <M/T> Set Conditions D Malfunction of engine-A/T-ECU <A/T>...
Page 248 13I-54 GDI - Troubleshooting Code No. P0443 Purge control solenoid valve system Probable cause Range of Check D Malfunction of the purge control solenoid valve D Ignition switch: ON D Open or short circuit in the purge control solenoid D Battery voltage is 10 V or more. valve circuit or loose connector contact Set Conditions D Malfunction of engine-ECU <M/T>...
Page 249 D Open or short circuit, or loose connector contact D Battery voltage: 10 V or more D Malfunction of engine-ECU <M/T> D The fuel cut operation and the injector operation (by carrying out the Actuator D Malfunction of engine-A/T-ECU <A/T> test) are not in progress.
Page 250 13I-56 GDI - Troubleshooting Code No. P1220 Electronic-controlled throttle valve Probable cause system Range of Check D Short in communication line D Ignition switch: ON D Malfunction of the engine-ECU <M/T> D Error in communication between the engine-ECU <M/T> or engine-A/T-ECU D Malfunction of the engine-A/T-ECU <A/T>...
Page 251 13I-57 GDI - Troubleshooting Code No. P1221 Throttle valve position feedback Probable cause system The throttle valve controller judges a malfunction, and then transmit the result to D Malfunction of throttle position sensor (1st channel) the engine-ECU <M/T> or engine-A/T-ECU <A/T>. D Open or short circuit in the throttle position sensor Range of Check (1st channel) circuit or loose connector contact...
Page 252 13I-58 GDI - Troubleshooting Code No. P1223 Communication line system with the Probable cause throttle valve controller Range of Check D Short in communication line D Ignition switch: ON D Malfunction of engine-ECU <M/T> D Battery voltage: 8 V or more. D Malfunction of engine-A/T-ECU <A/T>...
Page 253 13I-59 GDI - Troubleshooting Code No. P1224 Throttle valve control servo motor Probable cause (Motor 1st phase malfunction) system Range of Check D Malfunction of the throttle valve control servo D Throttle valve control servo relay: ON D Open circuit or short-circuited harness wire in D System voltage: 8 V or more.
Page 254 13I-60 GDI - Troubleshooting Code No. P1225 Accelerator pedal position sensor (2nd Probable cause channel) system Range of Check D Malfunction of accelerator pedal position sensor D Accelerator pedal position sensor (1st channel) is normal. (2nd channel) D Communication between the engine-ECU <M/T> or engine-A/T-ECU <A/T> D Open or short circuit in accelerator pedal position and the throttle valve controller is normal.
Page 255 13I-61 GDI - Troubleshooting From the previous page (1) NG Measure at accelerator pedal position Adjust the accelerator pedal position sensor connector C-172. sensor (Refer to P.13I-99*.) D Use test harness (MB991658) to connect terminals No. 6, No. 7, No. 8 only, and measure at the Check the following connectors: C-81, Repair pick-up harness side.
Page 256 13I-62 GDI - Troubleshooting Code No. P1228 Throttle valve control servo motor Probable cause (Motor 2nd phase malfunction) system Range of Check D Malfunction of the throttle valve control servo D Throttle valve control servo relay: ON D Open circuit or short-circuited harness wire in D System voltage: 8 V or more throttle valve control servo system, or poor Set Conditions...
Page 257 13I-63 GDI - Troubleshooting Code No. P1500 Alternator FR terminal system Probable cause Range of Check D Open circuit in alternator FR terminal circuit D Engine speed: 50 r/min or more D Malfunction of engine-ECU <M/T> Set Conditions D Malfunction of engine-A/T-ECU <A/T> D Input voltage from the alternator FR terminal is system voltage for 20 seconds.
Page 258 13I-64 GDI - Troubleshooting Code No. P1515 Brake vacuum sensor system Probable cause Range of Check D Malfunction of the brake vacuum sensor D Ignition switch: ON D Improper connector contact, open circuit or Set Conditions short-circuited harness wire of the brake vacuum D Sensor output voltage is 4.8 V or more.
Page 259 13I-65 GDI - Troubleshooting From the previous page (1) NG Check the following connectors: Repair Measure at brake vacuum sensor B-30 <LHD>, (C-47, C-81, C-114) connector A-48. <RHD>, C-164 <M/T>, C-175 <A/T> D Use test harness (MB991348) to connect terminals, and measure at the pick-up harness side.
Page 260 13I-66 GDI - Troubleshooting Cord No. P1610 Immobilizer system Probable cause Range of Check D Open or short circuit, or loose connector contact D Ignition switch: ON D Malfunction of the immobilizer-ECU Set Conditions D Malfunction of the engine-ECU <M/T> D Improper communication between the engine-ECU <M/T>...
Page 261 13I-67 GDI - Troubleshooting INSPECTION CHART FOR TROUBLE SYMPTOMS Trouble symptom Inspection Reference page procedure Communication Communication with all systems is not possible. 13I-68 with MUT-II is Communication with engine-ECU only is not possible. 13I-68 impossible. Engine warning The engine warning lamp does not illuminate right after the 13I-69 lamp and ignition switch is turned to the ON position.
Page 262 13I-68 GDI - GDI - Troubleshooting Troubleshooting INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS INSPECTION PROCEDURE 1 Communication with MUT-II is not possible. Probable cause (Communication with all systems is not possible.) The cause is probably a defect in the power supply system (including earth) for the D Malfunction of the connector diagnosis line.
Page 263 13I-69 GDI - Troubleshooting INSPECTION PROCEDURE 3 The engine warning lamp does not illuminate right after Probable cause the ignition switch is turned to the ON position. Because there is a burnt-out bulb, the engine-ECU <M/T> or engine-A/T-ECU <A/T> D Burnt-out bulb causes the engine warning lamp to illuminate for five seconds immediately after the D Defective warning lamp circuit ignitionswitch isturnedtoON.If theenginewarninglampdoesnotilluminateimmediately...
Page 264 INSPECTION PROCEDURE 5 No initial combustion (starting impossible) Probable cause This is caused by incorrect fuel supply into the combustion chamber, and improper D Malfunction of the fuel supply system ignition circuit. Besides that, foreign material may be contaminated in fuel.
Page 265 (5) Check that the spark plug ignites when the engine is cranked. Check all the following items: D Spark plug D Compression pressure D Foreign material (such as water or kerosine) entered the fuel lines Check trouble symptom. Replace the injector.
Page 266 (5) Check that the spark plug ignites when the engine is cranked. Check all the following items: D Spark plug D Compression pressure D Foreign material (such as water or kerosine) entered the fuel lines Check trouble symptom. Replace the injector.
Page 267 INSPECTION PROCEDURE 7 Unstable idling (rough idle, hunting) Probable cause This malfunction is probably caused by a faulty ignition system, improper air/fuel ratio, D Malfunction of the ignition system a faulty electronic-controlled throttle valve system, improper compression pressure, D Malfunction of the air/fuel ratio control system etc.
Page 268 (2) Exhaust gas emission control system (3) EGR system (4) Compression pressure (5) Foreign material (such as water or kerosine) entered the fuel line. (6) Air is sucked in the air intake system, or EGR gas leaks. D Damaged intake manifold gasket...
Page 269 13I-75 GDI - Troubleshooting INSPECTION PROCEDURE 8 Idle speed is high or low (Improper idling) Probable cause The cause is probably that the intake air amount during idling is too great or too D Malfunction of the electronic-controlled throttle valve small.
Page 270 INSPECTION PROCEDURE 9 When the engine is cold, it stalls at idling. (Die out) Probable cause The cause is probably an incorrect air/fuel ratio or poor intake air amount when the D Malfunction of the electronic-control throttle valve engine is cold.
Page 271 When the engine is hot, it stalls at idling. (Die out) Probable cause The cause is probably an improper air/fuel ratio, faulty electronic-controlled throttle D Malfunction of the ignition system valve system, compression pressure. In addition, if the engine stalls suddenly, another D Malfunction of air/fuel ratio control system possible cause might be a poor connector contact.
Page 272 (5) Check that the spark plug ignites when the engine is cranked. Check all the following items: D Spark plugs D Compression pressure D Foreign material (such as water or kerosine) entered the fuel lines NOTE: Refer to the ’99 GALANT Workshop Manual (Pub. No. PWDE9611-A)
Page 273 The cause is probably poor ignition due to a malfunctioning spark plug (weak spark), D Malfunction of the ignition system or an incorrect air/fuel ratio when the accelerator is depressed. D Malfunction of the EGR valve D Air stuck in the air intake system MUT-II Self-Diag code (Refer to P.13I-11, INSPECTION CHART FOR DIAGNOSIS...
Page 274 The engine stalls when decelerating. Probable cause The cause is probably an improper air/fuel ratio due to a faulty EGR system, or poor D Malfunction of the electronic-controlled throttle valve intake air volume due to a faulty electronic-controlled throttle valve system.
Page 275 SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.) OK: 600 - 1,000 mV when the engine is suddenly raced MUT-II Data list Measure fuel high-pressure between the fuel pump (high pressure) 11 Oxygen sensor (front) and injector. (Refer to P.13I-122.) OK: 0 - 400 mV and 600 - 1,000 mV alternates when the engine is idling (wait for four minutes after the engine started).
Page 276 13I-82 GDI - Troubleshooting From the previous page Measure high fuel pressure between the fuel pump (high pressure) Repair and injector. (Refer to P.13I-122.) Replace the ignition coil. Check ignition coil spark for each cylinder. (1) Remove the ignition coil.
Page 277 (At this time, use the MUT-II to check whether the ignition timing is retarded from when the detonation sensor connector is con- nected.) Check all the following items: D Spark plug D Foreign material (such as water or kerosine) entered the fuel lines INSPECTION PROCEDURE 17 Run-on (dieseling) Probable cause...
Page 278 Check trouble symptom. engine is idling (wait for four minutes after the engine started). Repair Measure fuel high-pressure between the fuel pump (high pressure) and injector. (Refer to P.13I-122.) Check ignition coil spark for each cylinder. (1) Remove the ignition coil.
Page 279 13I-85 GDI - Troubleshooting From the previous page Check the EGR valve system. (Refer to P.13I-51, INSPECTION MUT-II Data list PROCEDURE FOR DIAGNOSIS CODE No. P0403.) 68 EGR valve (Refer to P.13I-98.) Check purge control solenoid valve system. (Refer to P.13I-54, MUT-II Actuator test INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0443.) 08 Purge control solenoid valve (Refer to P.13I-104.)
Page 280 13I-86 GDI - GDI - Troubleshooting Troubleshooting INSPECTION PROCEDURE 20 Idling speed is improper when A/C is operating Probable cause If the engine-ECU <M/T> or engine-A/T-ECU <A/T> detects that the air conditioner D Malfunction of the A/C control system is on, it activates the idle speed control (ISC) servo to control idle-up operation. D Improper connector contact,...
Page 281: Clutch Switch System Malfunction
The clutch pedal switch sends a signal indicating clutch pedal depression to the D Malfunction of the clutch switch engine-ECU. The engine-ECU controls the fuel injection properly according to this D Open circuit or short-circuited harness wirein the clutch signal, thus prevents the fluctuation of the engine speed during shift change.

Page 282: Gdi Eco Indicator Lamp Remains Illuminated And Does Not Go Off
13I-88 GDI - Troubleshooting INSPECTION PROCEDURE 24 GDI ECO indicator lamp remains illuminated and does Probable cause not go off. If the GDI ECO indicator lamp does not go off during high load operation, the causes D Short circuit between the GDI ECO indicator lamp and listed in the right column are suspected.
Page 283 13I-89 GDI - Troubleshooting INSPECTION PROCEDURE 25 Engine-ECU (engine-A/T-ECU) power supply and earth Probable cause circuit system The cause is probably a malfunction of the engine-ECU <M/T> or D Open circuit or short-circuited harness wire in the engine-A/T-ECU <A/T> or one of the problems listed at right. engine-ECU <M/T>...
Page 284 13I-90 GDI - Troubleshooting <A/T> (1) NG Check the following connectors: C-92, C-131 Measure at the engine-A/T-ECU connectors C-175, C-176. D Disconnect the connector, and measure at the harness side. (1) Voltage between 98 and earth (Ignition switch: ON) Repair OK: System voltage (2) Voltage between 49 and earth Check the trouble symptoms.
Page 285 13I-91 GDI - Troubleshooting INSPECTION PROCEDURE 27 Injector driver relay system Probable cause When the ignition switch ON signal is input to the engine-ECU <M/T> or the D Malfunction of the injector driver relay engine-A/T-ECU <A/T>, engine-ECU <M/T> or the engine -A/T-ECU <A/T> turns D Improper connector contact, open circuit or on the injector driver relay.
Page 286 D Malfunction of the inhibitor switch <A/T> The engine-ECU <M/T> or engine-A/T-ECU <A/T> uses this signal to carry out D Open circuit or short-circuited harness wire of the functions such as fuel injection control during starting. ignition switch circuit D Malfunction of the engine-ECU <M/T>...
Page 287 13I-93 GDI - Troubleshooting INSPECTION PROCEDURE 29 Accelerator pedal position switch system Probable cause The accelerator pedal position switch detects that the accelerator pedal is fully closed, D Maladjustment of the accelerator cable and sends a signal to the engine-ECU <M/T> or engine-A/T-ECU <A/T>. The D Maladjustment of the accelerator pedal position switch engine-ECU <M/T>...
Page 288 The engine-ECU <M/T> or engine-A/T-ECU <A/T> turns on the fuel pump relay while D Malfunction of the fuel pump relay the engine is cranking or running, and supplies power source to the fuel pump (low D Malfunction of the fuel pump (low pressure) pressure).
Page 289 13I-95 GDI - Troubleshooting INSPECTION PROCEDURE 31 Power steering fluid pressure switch system Probable cause The power steering fluid pressure switch sends a signal to the engine-ECU <M/T> D Malfunction of the power steering fluid pressure switch or engine-A/T-ECU <A/T> according to power steering load. D Opencircuit orshort-circuited harnesswirein thepower Based on this signal, the engine-ECU <M/T>...
Page 290 13I-96 GDI - Troubleshooting INSPECTION PROCEDURE 33 M/T oil temperature sensor system Probable cause This sensor inputs the manual transmission oil temperature to the engine-ECU. D Malfunction of the M/T oil temperature sensor The engine-ECU uses this input to control the idle speed control servo so that D Open circuit or short-circuited harness wire in the the idle speed is increased when the manual transmission oil temperature M/T oil temperature sensor circuit...
Page 291 13I-97 GDI - Troubleshooting INSPECTION PROCEDURE 34 Stop lamp switch system Probable cause The engine-ECU <M/T> or engine-A/T-ECU <A/T> determines whether the brake pedal D Malfunction of the stop lamp switch is depressed or not, by means of the stop lamp switch input signal. D Open circuit or short-circuited harness wire in the stop lamp circuit, or poor connector contact D Malfunction of the engine-ECU <M/T>...
Page 292 13I-98 GDI - Troubleshooting DATA LIST REFERENCE TABLE Caution When shifting the select lever to D range, the brakes should be applied so that the vehicle does not move forward. NOTE : Within four minutes after starting the engine : In a new vehicle [driven approximately 500 km or less], the injector drive time is sometimes 10 % longer than the standard time.
Page 293 13I-99 GDI - Troubleshooting Item Check items Requirements Normal condition Inspection Reference procedure page Throttle posi- Engine coolant Release the accel- 4,500 - 5,500 mV Code No. 13I-43 tion sensor temperature: erator pedal. P0225 (2nd channel) 80 - 95_C Depress the accel- Voltage decreases Ignition switch: erator pedal gradu-...
Page 294 13I-100 GDI - Troubleshooting Item Check items Requirements Normal condition Inspection Reference procedure page Barometric Ignition switch: ON Altitude: 0 m 101 kPa Code No. 13I-15 pressure sen- P0105 Altitude: 600 m 95 kPa Altitude: 1,200 m 88 kPa Altitude: 1,800 m 81 kPa Accelerator Ignition switch: ON...
Page 295 13I-101 GDI - Troubleshooting Item Check items Requirements Normal condition Inspection Reference procedure page Injector drive Engine coolant Idling 0.4 - 0.6 ms* time* temperature: 80 - 95_C Lamps, electric 2,500 r/min 0.4 - 0.8 ms cooling fan and all accessories: Transmission: Sudden racing Increases...
Page 296 13I-102 GDI - Troubleshooting Item Check items Requirements Normal condition Inspection Reference procedure page Fuel pressure Engine coolant Engine: Idling 4 - 6.9 MPa Code No. 13I-33 sensor temperature: P0190 80 - 95_C Lamps, electric cooling fan and all accessories:...
Page 297 13I-103 GDI - Troubleshooting Item Check items Requirements Normal condition Inspection Reference procedure page Fuel pressure Engine coolant Engine: Idling 4,000 - 6,900 kPa sensor temperature: 80 - 95_C Lamps, electric cooling fan and all accessories: Transmission: Neutral (A/T: P range)
Page 298 Item Inspection Drive contents Inspection contents Normal condition Inspection Reference item procedure page Injectors Cut fuel to No. 1 Engine: Idling condition Code No. 13I-34 injector After having becomes different P0201 warmed up/Engine (becomes unsta- Cut fuel to No. 2 Code No.
Page 299 13I-105 GDI - Troubleshooting CHECK AT THE ENGINE-ECU TERMINALS <M/T> TERMINAL VOLTAGE CHECK CHART Engine-ECU Connector Terminal Arrangement Terminal No. Check item Check requirements (engine condition) Normal condition No. 1 injector Engine: Warm up, and then depress Decreases slightly for short the accelerator pedal suddenly from time from 9 - 13 V No.
Page 300 Engine: Idling System voltage, or changes A/C switch: OFF ® ON from momentarily 6 V or (Compressor is operating) more to 0 ® 3 V Fuel pump relay Ignition switch: Engine: Stopped System voltage Engine: Idling 0 - 3 V Engine warning lamp Ignition switch: OFF ®...
Page 301 13I-107 GDI - Troubleshooting Terminal No. Check item Check requirements (engine condition) Normal condition Oxygen sensor (rear) Transmission: 2nd gear 0.6 - 1.0 V Engine speed: 3,500 r/min or more Driving with the throttle valve widely open Power steering fluid Engine: Warm Steering wheel System voltage...
Page 302 System voltage Oxygen sensor heater Engine: Idling 0 - 3 V (rear) Engine: 3,500 r/min System voltage Fuel pressure sensor Engine: Idling 0.3 - 4.7 V Accelerator pedal position Ignition switch: Release the acceler- 0.9 - 1.2 V sensor (1st channel) ator pedal.
Page 303 13I-109 GDI - Troubleshooting CHECK CHART FOR RESISTANCE AND CONTINUITY BETWEEN TERMINALS 1. Turn the ignition switch to OFF. 2. Disconnect the engine-ECU connector. 3. Measure the resistance and check for continuity between the terminals of the engine-ECU harness-side connector while referring to the check chart.
Page 304 13I-110 GDI - Troubleshooting Engine-ECU Harness Side Connector Terminal Arrangement Terminal No. Check item Standard value, normal condition (check require- ments) 5 - 47 EGR valve (D) 10 - 20 W (at 20_C) EGR valve (C) 32 - 47 EGR valve (B) 34 - 47 EGR valve (A) 16 - 47...
Page 305 13I-111 GDI - Troubleshooting CHECK AT THE ENGINE-A/T-ECU TERMINALS <A/T> TERMINAL VOLTAGE CHECK CHART Engine-A/T-ECU Connector Terminal Arrangement Terminal Check item Check condition (Engine condition) Normal condition No. 1 injector While engine is idling after having warmed up, From 9 - 13 V, momen- suddenly depress the accelerator pedal.
Page 306 Engine: Idling System voltage A/C switch: OFF to ON (Compressor operating) changes momentarily 6 V or more to 0 - 3 V Fuel pump relay Ignition switch: ON System voltage Engine: Idling 0 - 3 V Engine warning lamp Ignition switch: OFF to ON...
Page 307 13I-113 GDI - Troubleshooting Terminal Check item Check condition (Engine condition) Normal condition Power steering fluid Engine: Idling after When steering wheel is System voltage pressure switch warming-up stationary When steering wheel is 0 - 3 V turned Barometric pressure Ignition switch: ON At an altitude of 0 m 3.7 - 4.3 V...
Page 308 0 - 3 V Lighting switch: Tail light position System voltage Sensor applied voltage Ignition switch: ON 4.5 - 5.5 V Fuel pressure sensor Engine: Idling 0.3 - 4.7 V A/C pressure sensor Engine: Idling Set the A/C switch to 8 V or more MAX.
Page 309 13I-115 GDI - Troubleshooting CHECK CHART FOR RESISTANCE AND CONTINUITY BETWEEN TERMINALS 1. Turn the ignition switch to OFF. 2. Disconnect the engine-A/T-ECU connector. 3. Measure the resistance and check for continuity between the terminals of the engine-A/T-ECU harness-side connector while referring to the check chart. NOTE (1) When measuring resistance and checking continuity, a harness for checking contact pin pressure should...
Page 310 13I-116 GDI - Troubleshooting Engine-A/T-ECU Harness Side Connector Terminal Arrangement Terminal No. Check item Standard value, normal condition (check conditions) 3 - 41 Oxygen sensor heater (front) 4.5 - 8.0 W (at 20_C) 26 - 41 Oxygen sensor heater (rear) 11 - 18 W (at 20_C) 34 - 41 Purge control solenoid valve...
Page 311 13I-117 GDI - Troubleshooting CHECK AT THE THROTTLE VALVE CONTROLLER TERMINALS TERMINAL VOLTAGE CHECK CHART Throttle Valve Controller Terminal Arrangement Terminal Check items Requirements Normal value Throttle valve control servo Ignition switch: ON Decreases slightly from (A+) Accelerator pedal: Fully opened ® system voltage.
Page 312 13I-118 GDI - Troubleshooting INSPECTION PROCEDURE USING AN ANALYZER Analyzer AIR FLOW SENSOR (AFS) The followings have been changed from the previous Special description. patterns pickup Alternate Method (Test harness not available) <Vehicles with M/T> 1. Connect the analyzer special patterns pickup to engine-ECU terminal 61.
Page 313 13I-119 GDI - Troubleshooting INJECTORS AND INJECTOR OPEN CIRCUIT CHECK SIGNAL Measurement Method <Vehicles with M/T> 1. Connect the analyzer special patterns pickup to terminal 1 (No. 1 injector) of the engine-ECU connector. 2. Connect the analyzer special patterns pickup to terminal 96 (injector open circuit check signal) of the engine-ECU Special patterns connector.
Page 314 13I-120 GDI - Troubleshooting EGR VALVE (STEPPER MOTOR) The followings have been changed from the previous description. Alternate Method (Test harness not available) <Vehicles with M/T> Connect the analyzer special patterns pickup to engine-ECU terminal 34, connection terminal 32, connection terminal 6, and connection terminal 5 respectively.
Page 315: On-Vehicle Service
(HOW TO REDUCE FUEL PRESSURE) When removing the fuel pipe, hose, etc., since fuel pressure in the fuel pipe line is high, do the following operation so as to release fuel pressure in the line and prevent fuel from running out.
Page 316: Fuel Pressure Test
Fuel pump MEASUREMENT OF FUEL LOW PRESSURE BETWEEN (high pressure) FUEL PUMP (LOW PRESSURE) AND FUEL PUMP (HIGH PRESSURE) 1. Release residual pressure from the fuel pipe line to prevent High- fuel gush out. (Refer to P. 13I-121) pressure fuel hose 2.
Page 317 10. Measure fuel pressure while the engine is running at idle. Standard value: approximately 324 kPa 11. Check to see that fuel pressure at idle does not drop even after the engine has been raced several times. 12. If fuel pressure is out of the standard value, troubleshoot and repair according to the table below.
Page 318 6. Check if the fuel pressure is more than 1 MPa immediately after 20 seconds have passed since cranking was finished. 7. If the fuel pressure is lower than 1 MPa, it means that there is likely to be a leak in the high-pressure fuel system, so this system should be checked.
Page 319: Fuel Leak Check
13I-125 GDI - On-vehicle Service 12. Check to see that fuel pressure at idle does not drop even after the engine has been raced several times. 13. If fuel pressure is out of the standard value, troubleshoot and repair according to the table below.
Page 320: Oxygen Sensor Check
Engine Oxygen sensor Remarks output voltage When racing 0.6 - 1.0 V If you make the air/fuel the engine ratio rich by racing the engine repeatedly, a nor- mal oxygen sensor will output a voltage of 0.6 - 1.0 V.
Page 321 13I-127 GDI - On-vehicle Service <Oxygen sensor (rear)> Equipment side connector 1. Disconnect the oxygen sensor connector and connect the special tool (test harness set) to the connector on Oxygen sensor the oxygen sensor side. (rear) 2. Make sure that there is continuity (11 - 18 W at 20_C) between terminal 3 and terminal 4 on the oxygen sensor connector.
Page 322 Fuel Pump (High Pressure) FUEL PUMP (HIGH PRESSURE) REMOVAL AND INSTALLATION Pre-removal and Post-installation Operation Prevention of fuel discharge <before removal only> Air Cleaner Assembly Removal and Installation (Refer to P.13I-121.) Fuel Leak Check <after installation only> Engine Cover Removal and Installation (Refer to P.13I-125)
Page 323 Fuel Pump (High Pressure) REMOVAL SERVICE POINT AA" FLANGE REMOVAL Fuel pressure sensor If the fuel pressure sensor is used again, write the mating mark on the the sensor and the mating mark on the flange Flange before removing the flange.
Page 324 Take care not let any of the engine oil get inside the fuel pump (high pressure). 3. Insert the fuel fitting straight into the mounting hole of fuel pump (high pressure). Ensure that the fuel fitting should be securely inserted without being torsioned and tighten the mounting bolt to the specified torque.
Page 325 13I-131 GDI - Fuel Pump (High Pressure) 3. Insert the fuel pipe straight into the mounting hole of the fuel pump (high pressure) and the delivery pipe. Make sure that the fuel pipe should be securely inserted to the bottom without being tortioned and tighten the mounting bolt to the specified torque.
Page 326 2000 r/min for 15 seconds or more to air-bleed the high-pressure fuel line. NOTE If the removal of the fuel pipe causes the air to be trapped inside the high-pressure fuel line, diagnosis code No.P0190 is output for abnormal fuel pressure.
Page 327: Injector
16. Fuel injector "DA 6. Back-up ring B "CA 17. Injector gasket AA" 7. Injector harness connector "AA 18. Corrugated washer "CA 8. Injector harness washer 19. Delivery pipe "CA 9. Injector holder AB" "CA 10. Delivery pipe and Fuel injector assembly...
Page 328 Caution If the corrugated washer which was once tightened is used again, it can cause fuel leak or gas leak. Therefore, always use a new one. No good "BA FUEL INJECTOR ASSEMBLY INSTALLATION 1.
Page 329 Delivery pipe 2. Install the injector gasket and the insulator to the cylinder head. 3. Install the delivery pipe and the fuel injector assembly to the cylinder head and temporarily tighten the mounting bolt. 4. Install the injector holder and the injector washer and tighten the mounting bolt to the specified torque.
Page 330 15 seconds or more to air-bleed the high-pressure fuel line. NOTE If the removal of the fuel pipe causes the air to be trapped inside the high-pressure fuel line, diagnosis code No.P0190 is output for abnormal fuel pressure. 2. If the trouble code No. 0190 of the fuel pressure sensor system is output after checking the diagnosis with the MUT-II, erase the trouble code.

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