61-04

EPS DTC Troubleshooting: 61-04

DTC 61-04: Open/Short in the EPS Motor Harness (Steering Diagnosis)

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0).

4. Start the engine.

5. Turn the steering wheel to the right or left, and wait 10 seconds or more.

Does the EPS indicator come on?
YES - Go to step 6.

NO - Check for loose terminals or poor connections. If the connections are good, the system is OK at this time.


6. Check for DTCs with the HDS.

Is DTC 61-04 indicated?
YES - Go to step 7.

NO - Troubleshoot the indicated DTC. If there are no DTCs, the system is OK at this time.


7. Turn the ignition switch to LOCK (0).

8. Disconnect EPS control unit connector B (2P) and connector C (2P).

9. Check for continuity between the following terminals of the EPS control unit connector B (2P) and connector C (2P).

Is there continuity?
YES - Go to step 10.

NO - Go to step 13.






10. Check for continuity between body ground and EPS control unit connector B (2P) terminal No. 1, connector C (2P) terminal No. 1, and connector C (2P) terminal No. 2 individually.

Is there continuity?
YES - Go to step 11.

NO - Check for loose terminals in the EPS control unit connectors, and repair if necessary. If no poor connections are found, replace the EPS control unit. Service and Repair










11. Disconnect the EPS motor 1P connector and the EPS motor 2P connector.

12. Check for continuity between body ground and EPS control unit connector B (2P) terminal No. 1, connector C (2P) terminal No. 1, and connector C (2P) terminal No. 2 individually.

Is there continuity?
YES - Repair short to body ground in the wire between the EPS control unit and the EPS motor.

NO - Short to the body ground in the EPS motor wire, or the EPS motor internal circuit, replace the EPS motor. Service and Repair










13. Disconnect the EPS motor 1P connector and the EPS motor 2P connector.

14. On the EPS motor side, check for continuity between the following terminals of the EPS motor 1P and the EPS motor 2P connector.

Is there continuity?
YES - Repair open in the wire between the EPS control unit and the EPS motor.

NO - Open in the EPS motor wire, or the EPS motor internal circuit, replace the EPS motor. Service and Repair