Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 928

MANUAL TRANSMISSION - Troubleshooting <ACD>
Code No.51 Longitudinal G sensor system
Code No.51 is output when the output signal of the longitudinal G sensor is less
than 0.5 V or above 4.5 V.
MUT-II Data List
D No.14 Longitudinal G sensor voltage
OK: Refer to P.22A-35 (Data List Reference Table).
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions)
Measure at longitudinal G sensor connector D-32.
D Disconnect the connector and measure at the harness
side.
D Ignition switch: ON
(1) Voltage between terminal 1 and earth
OK: System voltage
(2) Resistance between terminal 3 and earth.
OK: 2 Ω or less
MB991348
D-32
Harness side
connector
D Remove the longitudinal G sensor.
D Connect the special tool between the connector D-32 at
the harness of the longitudinal G sensor and the
longitudinal G sensor.
D Ignition switch: ON
D Voltage between terminal 2 and body earth [when the
longitudinal G sensor is placed horizontally]
OK: 2.4 - 2.6 V
D Voltage between terminal 2 and body earth [when the
longitudinal G sensor is placed with the labeled side
facing at the side]
OK: 3.3 - 3.7 V
Check the following connectors:
<Vehicles with ACD and AYC> D-32, C-44, C-128, B-123
<L.H. drive vehicles with ACD> D-32, C-128, C-44
<R.H. drive vehicles with ACD> D-32, C-44
NG→Repair
Check the harness between the longitudinal G sensor and
4WD-ECU.
D Check for open circuit, ground and damage of the power
line.
Check the harness between the longitudinal G sensor and
ABS-ECU. <Vehicles with ACD and AYC>
D Check for ground and damage of the power line.
NG→Repair
NG
OK
Label
Label
OK
OK
Probable cause
D Harness or connector fault
D Longitudinal G sensor fault
D ABS-ECU fault <Vehicles with ACD and AYC>
D 4WD-ECU fault
(1) NG
Check the following connectors: D-32, C-213, C-210
NG→Repair
Check the harness between the longitudinal G sensor and
ignition switch.
(2) NG
D Check for open circuit, ground and damage of the power
line.
NG→Repair
Check the following connectors:
<L.H. drive vehicles with ACD and AYC> D-32, C-128, C-130,
B-123
<R.H. drive vehicles with ACD and AYC> D-32, C-128, B-123
<L.H. drive vehicles with ACD> D-32, C-128, C-130, C-44
<R.H. drive vehicles with ACD> D-32, C-44
NG→Repair
Check the harness between the longitudinal G sensor and
ABS-ECU. <Vehicles with ACD and AYC>
D Check for open circuit and damage of the earth line.
Check the harness between the longitudinal G sensor and
4WD-ECU. <Vehicles with ACD>
D Check for open circuit and damage of the earth line.
NG→Repair
MUT-II Data List
D No.14 Longitudinal G sensor voltage
OK: Refer to P.22A-35 (Data List Reference Table).
NG→Refer to GROUP 35B - Troubleshooting, <Vehicles with
ACD and AYC> or replace the 4WD-ECU <Vehicles with
ACD>.
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions)
NG
Replace the longitudinal G sensor.
OK
MUT-II Data List
D No.14 Longitudinal G sensor voltage
OK: Refer to P.22A-35 (Data List Reference Table).
NG→Refer to GROUP 35B - Troubleshooting <Vehicles with
ACD and AYC>, or replace the 4WD-ECU.
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions)
22A-21
OK
OK
OK