EPS Indicator Does Not Go Off, And No DTCs Are Stored

EPS Symptom Troubleshooting - EPS indicator does not go off, and no DTCs are stored

EPS indicator does not go off, and no DTCs are stored

NOTE: Check for gauge DTCs with the HDS. If gauge DTCs are stored, troubleshoot those DTCs first.

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

2. Check the No. 4 (7.5 A) fuse in the under-dash fuse/relay box.

Is the fuse blown?

YES -

Go to step 3.

NO -

Reinstall the checked fuse, then go to step 7.

3. Disconnect EPS control unit connector D (28P).

4. Check for continuity between EPS control unit connector D (28P) terminal No. 16 and body ground.





Is there continuity?

YES -

Repair a short to body ground in the wire between the EPS control unit and the No. 4 (7.5 A) fuse in the under-dash fuse/relay box.�

NO -

Install a new No. 4 (7.5 A) fuse in the under-dash fuse/relay box, then go to step 5.

5. Reconnect EPS control unit connector D (28P).

6. Turn the ignition switch to ON (II), and watch the EPS indicator.

Does the EPS indicator come on, then go off?

YES -

The system is OK at this time.�

NO -

Replace the EPS control unit Service and Repair.�

7. Disconnect EPS control unit connector D (28P).

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

9. Measure the voltage between EPS control unit connector D (28P) terminal No. 16 and body ground.





Is there battery voltage?

YES -

Go to step 10.

NO -

Repair an open in the wire between the EPS control unit and under-dash fuse/relay box.�

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

11. Disconnect EPS control unit connector A (2P).

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





Is there continuity?

YES -

Go to step 13.

NO -

Repair an open in the wire between the EPS control unit and body ground (G402).�

13. Disconnect the gauge control module (tach) 36P connector.

14. Check for continuity between EPS control unit connector D (28P) terminal No. 1 and gauge control module (tach) 36P connector terminal No. 1.





Is there continuity?

YES -

Go to step 15.

NO -

Repair an open in the wire between the EPS control unit and the gauge control module (tach).�

15. Check for continuity between EPS control unit connector D (28P) terminal No. 15 and gauge control module (tach) 36P connector terminal No. 19.





Is there continuity?

YES -

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.�

NO -

Repair an open in the wire between the EPS control unit and the gauge control module (tach).�