EPS Indicator Does Not Go Off, and No DTCs Are Stored (With 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. Diagnostic Aids 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).