DTC Troubleshooting: 34-02

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

1.Clear the DTC using the HDS.

2.Turn the ignition switch OFF.

3.Turn the ignition switch ON (II).

Does the EPS indicator come on?


YES - Go to 4.


NO - Check for loose terminals or poor connections. If the connections are good, the system is OK at this time.n


4.Verify the DTC.

Is DTC 34-02 indicated?


YES - Go to 5.


NO - Perform the appropriate troubleshooting for the code indicated.n


5.Turn the ignition switch OFF.

6.Disconnect the EPS control unit connector A (2P), connector B (2P), connector C (2P) and connector D (28P).

7.Turn the ignition switch ON (II).

8.Measure the voltage between body ground and the EPS control unit connector B (2P) No. 1 terminal, connector C (2P) No. 1 terminal, connector C (2P) No. 2 terminal individually.

 

 

Is there battery voltage?


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


NO - Check for loose terminals in the EPS control unit connectors, and repair if necessary. If no poor connections are found, replace the EPS control unit.n