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).
  1. Check the No. 6 (7.5 A) fuse in the driver's under-dash fuse/relay box.
Is the fuse blown?
YES -
Go to Step 3 .
NO -
Reinstall the checked fuse, then go to Step 5 .
  1. Disconnect the EPS control unit connector D (28P).
  1. 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 6 .
  1. Disconnect the EPS control unit connector D (28P).
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between EPS control unit connector D (28P) terminal No. 16 and body ground.
Is there battery voltage?
YES -
Go to Step 8 .
NO -
Repair open in the wire between the EPS control unit and driver's under-dash fuse/relay box.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the EPS control unit connector A (2P).
  1. Check for continuity between EPS control unit connector A (2P) terminal No. 1 and body ground.
Is there continuity?
YES -
Go to Step 11 .
NO -
Repair open in the wire between the EPS control unit and body ground (G203) *1 , (G303) *2 .■
*1: LHD model
*2: RHD model
  1. Disconnect the gauge control module 32P connector.
  1. Check for continuity between EPS control unit connector D (28P) terminal No. 1 and gauge control module 32P connector terminal No. 22.
Is there continuity?
YES -
Go to Step 13 .
NO -
Repair open in the wire between the EPS control unit and the gauge control module.■
  1. Check for continuity between EPS control unit connector D (28P) terminal No. 15 and gauge control module 32P connector terminal No. 21.
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. ■
NO -
Repair open in the wire between the EPS control unit and the gauge control module.■