Visual Inspection; Engine Basic Inspection - Suzuki SX4 Service Manual

THROTTLE MOTOR RELAY (ON/OFF)
ON: Throttle actuator (motor) control activated by ECM.
OF: Throttle actuator (motor) control stopped by ECM.
VEHICLE SPEED (km/h, mph)
It is computed based on pulse signals from front wheel
speed sensor (RH, LH) (for M/T model) or output shaft
speed sensor (VSS) (for A/T model).

Visual Inspection

Visually check the following parts and systems.
• Engine oil – level, leakage
• Engine coolant – level, leakage
• Fuel – level, leakage
• Air cleaner element – dirt, clogging
• Battery – fluid level, corrosion of terminal
• Water pump belt – tension damage
• Throttle valve – operating sound
• Vacuum hoses of air intake system – disconnection, looseness,
deterioration, bend
• Connectors of electric wire harness – disconnection, friction
• Fuses – burning
• Parts – installation, bolt – looseness
• Parts – deformation
• Other parts that can be checked visually
Also check the following items at engine start, if possible
• Malfunction indicator lamp – Operation
• Charge warning lamp – Operation
• Engine oil pressure warning lamp – Operation
• Engine coolant temp. meter – Operation
• Fuel level meter – Operation
• Tachometer – Operation
• Abnormal air being inhaled from air intake system
• Exhaust system – leakage of exhaust gas, noise
• Other parts that can be checked visually

Engine Basic Inspection

This check is very important for troubleshooting when ECM has detected no DTC and no abnormality has been found
in "Visual Inspection".
Follow the flow carefully.
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Check battery voltage
Is it 11 V or more?
3 Is vehicle equipped with keyless start control system?
Inspection item
Action
Engine General Information and Diagnosis:
INJ PULSE WIDTH (FUEL INJECTION PULSE WIDTH,
msec.)
This parameter indicates time of the injector drive (valve
opening) pulse which is output from ECM (but injector
drive time of NO.1 cylinder for multiport fuel injection).
Reference section
"Engine Oil and Filter Change in Section 0B"
"Coolant Level Check in Section 1F"
"Fuel Lines and Connections Inspection in
Section 0B"
"Air Cleaner Filter Inspection in Section 0B"
"Battery Dismounting and Remounting in
Section 1J"
"Accessory Drive Belt Inspection in Section
0B"
"Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C"
"Vacuum Hose Inspection in Section 1B"
"Malfunction Indicator Lamp (MIL) Check"
"Generator Symptom Diagnosis in Section 1J"
"Oil Pressure Switch Inspection in Section 9C"
"Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C"
"Fuel Level Sensor Inspection in Section 9C"
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
1A-43
S7RW0A1104010
S7RW0A1104011
No
Go to "Engine and
Emission Control
System Check".
Charge or replace
battery.
Go to Step 5.