Gauge Control Module

DTC Troubleshooting: U0131

DTC U0131:

Gauge Control Module Lost Communication With EPS Control Unit (EPS Message)

NOTE:

- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.
- If the HDS dose not communicate with the EPS control unit, the EPS indicator stays on, and no EPS DTCs are stored. Go to symptom troubleshooting for EPS indicator does not go off, and no DTCs are stored Symptom Troubleshooting.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC U0131 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the gauge control module and the EPS control unit.

5. Check for EPS DTCs with the HDS.

Is any DTCs indicated?

YES -

Go to the EPS indicated DTCs troubleshooting, then recheck.

NO -

Go to step 6.

6. Turn the ignition switch to LOCK (0).

7. Disconnect the gauge control module 32P connector.

8. Disconnect the EPS control unit 28P connector.

9. Check for continuity between gauge control module 32P connector terminals No. 21 and No. 22 and EPS control unit 28P connector terminals No. 15 and No. 1 respectively.





Is there continuity?

YES -

Substitute a known-good EPS control unit Service and Repair, and recheck. If the indication goes away, replace the original EPS control unit Service and Repair. If the DTC is still present, replace the gauge control module Service and Repair.

NO -

Repair an open or poor connection in the wire between the EPS control unit and the gauge control module.