34-02

EPS DTC Troubleshooting: 34-02

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

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

4. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

5. Check for DTCs with the HDS.

Is DTC 34-02 indicated?
YES - Go to step 6.

NO - Troubleshoot the indicated DTC. If there are no DTCs, the system is OK at this time.


6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

7. Disconnect EPS control unit connector B (2P) and connector C (2P).

8. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

9. Measure the 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 control unit. Service and Repair