EPS

Control System DTCs

EPS DTC Troubleshooting: 34-02

DTC 34-02 : Fail-Safe Relay

1. Problem verification:

Problem verification
-1. Turn the ignition switch to ON (II).

-2. Clear the DTC with the HDS.

-3. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

-4. Check for DTCs with the HDS

Is DTC 34-02 indicated?
-YES- The failure is duplicated. Go to step 2.
-NO- Intermittent failure, the system is OK at this time. If another DTC is indicated, go to the indicated DTC's troubleshooting.

2. Shorted wire check (MTR lines to power):

Shorted wire check (MTR lines to power)
-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





-3. Turn the ignition switch to ON (II).

-4. Measure the voltage between these test points and body ground individually.














Is there battery voltage?
-YES- Repair a short to power in the wire between the EPS control unit and the EPS motor.
-NO- The MTR wires are OK. Go to step 3.

3. EPS control unit check (update):

EPS control unit check (update)
-1. Turn the ignition switch to LOCK (0).

-2. Reconnect the following connector.





-3. Turn the ignition switch to ON (II).

-4. Update the EPS control unit Programming and Relearning if it does not have the latest software.

-5. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

-6. Check for DTCs with the HDS.

Is DTC 34-02 indicated?
-YES- Replace the EPS control unit Service and Repair.
-NO- Troubleshooting is complete.