MICU Lost Communication With Gauge Control Module

DTC Troubleshooting: U0155

DTC U0155:

MICU Lost Communication With Gauge Control Module

NOTE: If you are troubleshooting multiple DTCs, be sure to follow instructions in B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.

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 U0155 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.�

5. Check for DTCs with the HDS.

Is DTC U1280 indicated?

YES -

Go to the DTC U1280 troubleshooting U1280.�

NO -

Go to step 6.

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

7. Disconnect the gauge control module 32P connector.

8. Disconnect under-dash fuse/relay box connector T (34P).

9. Check for continuity between gauge control module 32P connector terminals No. 19 and No. 20 and under-dash fuse/relay box connector T (34P) terminals No. 29 and No. 12 respectively.





Is there continuity?

YES -

Go to the gauge control module input test, and do all power and ground input tests Gauge Control Module Input Test. If the tests prove OK, replace the gauge control module Service and Repair.�

NO -

Repair an open or high resistance in the wire.�