Diagnosis Procedure

FUEL INJECTOR


Diagnosis Procedure

1.CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.





4. Check the voltage between fuel injector harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F102, M72
- Fuse block (J/B) connector M4
- 15 A fuse (No. 1)
- Harness for open or short between fuel injector and fuse
Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between fuel injector harness connector and ECM harness connector.





4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES - GO TO 4.
NO - Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK FUEL INJECTOR
Refer to Component Inspection.
Is the inspection result normal?
YES - GO TO 5.
NO - Replace malfunctioning fuel injector.
5.CHECK INTERMITTENT INCIDENT
Refer to Description.
Is the inspection result normal?
YES - Replace IPDM E/R.
NO - Repair open circuit, short to ground or short to power in harness or connectors.