Without 4WAS

POWER SUPPLY AND GROUND CIRCUIT





Description
Power supply to EPS system.




Diagnosis Procedure
1.CHECK POWER SUPPLY (1)
1. Turn the ignition switch OFF.
2. Disconnect power steering control unit harness connector.
3. Check the voltage between power steering control unit harness connector and ground.





4. Turn the ignition switch ON.

CAUTION:
Never start the engine.
5. Check the voltage between power steering control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK POWER SUPPLY (2)
1. Turn the ignition switch OFF.
2. Check 10A fuse (#46).
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between power steering control unit harness connector and IPDM E/R harness connector.





5. Check the continuity between power steering control unit harness connector and ground.





Is the inspection result normal?
YES - Perform trouble diagnosis for ignition power supply circuit. .
NO - Repair or replace damaged parts.
3.CHECK GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Check the continuity between power steering control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair or replace damaged parts.
4.CHECK TERMINALS AND HARNESS CONNECTORS
Check the power steering control unit pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES - INSPECTION END
NO - Repair or replace damaged parts.