DTC 34-02

DTC 34-02: Fail-safe Relay Stuck ON (Initial diagnosis)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch OFF.
4. Turn the ignition switch ON (II).
5. Check for the DTCs with the HDS.

Is DTC 34-02 indicated?

YES - Go to step 6.

NO - The system is OK at this time.

6. Turn the ignition switch OFF.
7. Disconnect EPS control unit connectors B (2P) and C (2P).
8. Turn the ignition switch ON (II).
9. Measure voltage between body ground and EPS control unit connector B (2P) terminal No. 1, connector C (2P) terminal No. 1, and connector C (2P) terminal No. 2 individually.








Is there battery voltage?

YES - Go to step 10.

NO - Replace the EPS control unit.

10. Turn the ignition switch OFF.
11. Disconnect the EPS motor 1P and 2P connectors.
12. Turn the ignition switch ON (II).
13. Measure voltage between body ground and EPS control unit connector B (2P) terminal No. 1, connector C (2P) terminal No. 1, and connector C (2P) terminal No. 2 individually.








Is there battery voltage?

YES - Repair short to power in the wire between the EPS control unit and the EPS motor.

NO - Replace the EPS motor. The fault is a short to power in the EPS motor wire harness, or EPS motor internal circuit.