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

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 OK?
YES - Reinstall the checked fuse, then go to step 11.

NO - Go to step 3.


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 short to body ground in the wire between the EPS control unit and the No. 6 (7.5 A) fuse in the driver's under-dash fuse/relay box.

NO - Install a new No. 6 (7.5 A) fuse in the driver's under-dash fuse/relay box, then go to step 5.






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

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

Does the EPS indicator go off?
YES - Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTC's troubleshooting.

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






13. Disconnect the gauge control module (tach) 36P connector and EPS control unit connector D (28P).

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