Diagnosis Procedure
- CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect fuel injector harness connector.
- Turn ignition switch ON.
- Check the voltage between fuel injector harness connector and ground.
Fuel injector Ground Voltage Cylinder Connector Terminal 1 F123 1 Ground Battery voltage 2 F124 1 3 F125 1 4 F126 1 5 F127 1 6 F128 1 7 F129 1 8 F130 1 Is the inspection result normal?
YES: GO TO 3.
NO: GO TO 2.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F60, F121
- Harness connectors E10, F10
- IPDM E/R harness connector E7
- 10 A fuse (No. 44)
- Harness for open or short between fuel injector and fuse
: Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between fuel injector harness connector and ECM harness connector.
Fuel injector ECM Continuity Cylinder Connector Terminal Connector Terminal 1 F123 2 F110 25 Existed 2 F124 2 21 3 F125 2 17 4 F126 2 37 5 F127 2 41 6 F128 2 45 7 F129 2 29 8 F130 2 33 - Also check harness for short to ground and short to power.
Is the inspection result normal?
YES: GO TO 5.
NO: GO TO 4
- DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F60, F121
- Harness connectors F69, F122
- Harness for open or short between fuel injector and ECM
: Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK FUEL INJECTOR
Refer to "COMPONENT INSPECTION ".
Is the inspection result normal?
YES: GO TO 6.
NO: Replace malfunctioning fuel injector. Refer to "REMOVAL AND INSTALLATION ".
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
Is the inspection result normal?
YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".
NO: Repair open circuit, short to ground or short to power in harness or connectors.