Power Supply And Ground Circuit

POWER SUPPLY AND GROUND CIRCUIT

TCU : Diagnosis Procedure


1. CHECK FUSE

Check if the fuse is burned out.





Is the check result normal?
YES- GO TO 2.
NO- Replace the fuse after repairing the applicable circuit.

2. CHECK BATTERY VOLTAGE

Check the voltage between the TCM harness connector and ground.





Is the check result normal?
YES- GO TO 3.
NO- Repair harness between TCU and fuse.

3. GROUND CIRCUIT INSPECTION

1.Turn the ignition switch OFF.
2.Disconnect the TCU connector.
3.Check the continuity between TCU vehicle-side harness connector and ground.





Is the check result normal?
YES- INSPECTION END
NO- Repair the harnesses or connectors.