DTC Troubleshooting: 91-03
EPS Control Unit DTC 91-03:
 Torque Sensor VS1 and VS2 Lines
  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 vehicle on a straight road at 72 km/h (45 mph) or more for 1 minute 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 91-03 indicated?
YES -
Go to Step 6 .
NO -
Troubleshoot the indicated DTC(s).■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the torque sensor 3P connector and EPS control unit connector D (28P).
  1. Check for continuity between EPS control unit connector D (28P) terminals No. 8 and No. 10.
Is there continuity?
YES -
Repair short in the wires between EPS control unit and torque sensor.■
NO -
Go to Step 9 .