DTC Troubleshooting: 91-02, 92-01, 92-02
EPS Control Unit DTC 91-02:
 EPS Control Unit (Problem with the Current Sensor Offset)
EPS Control Unit DTC 92-01:
 EPS Control Unit (Lower FET Stuck ON)
EPS Control Unit DTC 92-02:
 EPS Control Unit (Upper FET Stuck ON)
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch to LOCK (0).
  1. Start the engine with the LKAS activated, test-drive on a straight road at 72 km/h (45 mph) or more for 30 seconds or more.
  1. Watch the LKAS indicator.
Does the LKAS indicator come on?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Check for DTC with the HDS.
Is DTC 91-02, 92-01, or 92-02 indicated?
YES -
Check for loose terminals in the EPS control unit connectors, and repair if necessary. If all connections are OK, replace the EPS control unit. ■
NO -
Troubleshoot the indicated DTC(s).■