P0625

DTC P0625 / P0626

DTC Detecting Condition and Trouble Area






Wiring Diagram

Refer to P0620 DTC P0620.

DTC Confirmation Procedure

1) Warm up engine to normal operating temperature.
2) Check that the following conditions are met.
- Blower fan: ON
- Headlight switch: ON
- Rear defogger switch: ON
3) Run engine at idle speed for 5 min.

DTC Troubleshooting

1.
Was "Engine and Emission Control System Check" performed?
YES -
Go to Step 2.
NO -
Go to Engine and Emission Control System Check Engine and Emission Control System Check.

2. Generator field coil monitor signal circuit check

Turn OFF ignition switch and connectors from generator and ECM.
Check for proper terminal connection to generator connector and ECM connectors.
If connections are OK, check that generator field coil monitor signal circuit (B1) is as follows.
- Wiring harness resistance of generator field coil monitor signal circuit is less than 3 ohms.
- Insulation resistance between generator field coil monitor signal circuit and vehicle body ground is infinity.
- Insulation resistance of wire harness is infinity between generator field coil monitor signal circuit terminal and each terminal at generator connector.
- Circuit voltage of generator field coil monitor signal circuit is 0 - 1 V with ignition switch in ON position.

Is it in good condition?
YES -
Go to Step 3.
NO -
Repair or replace defective wire harness.

3. Repair or Replace generator. Generator Removal and Installation
Check DTC.

Is DTC P0625 or P0626 still detected?
YES -
Substitute a known-good ECM and recheck.
NO -
End.