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EPS DTC Troubleshooting: 33-03, 33-04, 33-05

DTC 33-03:
 FET Stuck ON (Overcurrent) (Regular Diagnosis)
DTC 33-04:
 FET Stuck ON (Failure) (Regular Diagnosis)
DTC 33-05:
 FET Stuck ON (Overcurrent Addition) (Regular Diagnosis)
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Turn the ignition switch to LOCK (0).
  1. Start the engine.
  1. Turn the steering wheel from lock to lock several times, and hold the steering wheel for 10 seconds or more.
  1. Check for DTCs with the HDS.
Is DTC 33-03, 33-04, or 33-05 indicated?
YES -
Go to Step 7 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the EPS control unit connector B (2P).
  1. Check for continuity between body ground and EPS control unit connector B (2P) No. 1 terminal, and No. 2 terminal.
Is there continuity?
YES -
Go to Step 10 .
NO -
Go to Step 12 .
  1. Disconnect the EPS motor 2P connector.

  1. On the EPS motor side, check for continuity between body ground and EPS motor 2P connector No. 1 terminal, and No. 2 terminal.
Is there continuity?
YES -
NO -
Repair short to body ground in the wire between the EPS control unit and EPS motor.■
  1. Disconnect the EPS motor 2P connector.
  1. Turn the ignition switch to ON (II).

  1. Measure the voltage between body ground and EPS control unit connector B (2P) No. 1 terminal, and No. 2 terminal.
Is there battery voltage?
YES -
Repair short to power in the wire between the EPS control unit and the EPS motor.■
NO -
Check for loose terminal in the EPS control unit connectors, and repair if necessary. If no poor connections are found, replace the EPS control unit.