U128F

DTC Troubleshooting: U128F

DTC U128F:

Gauge Control Module Lost Communication With BSI Control Unit (BSI 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.

1. Clear the DTCs with the HDS.

2. Press the engine start/stop button to select the OFF, ACC, ON, and OFF mode.

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC U128F indicated?

YES -

Go to step 5.

NO -

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

5. Check for DTCs with the HDS.

Are DTC U1282, U1283, U1286, U1289, and/or U128B also indicated?

YES -

Do the gauge control module input test Gauge Control Module Input Test.�

NO -

Substitute a known-good BSI control unit BSI Control Unit Removal/Installation, and recheck. If the indication goes away, replace the original BSI control unit BSI Control Unit Removal/Installation.�