B1157

DTC B1157: Gauge Control Module Lost Communication with Multiplex Integrated Control Unit (MICU)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Check for DTCs with the HDS.

Is DTC B1157 indicated?

YES - Go to step 4.

NO - Intermittent failure. The gauge control system is OK at this time. Check pinfits and connections.

4. Check for DTCs with the HDS.

Is DTC B1055, B1255 and B1806 indicated?

YES - Go to Multiplex Integrated Control Unit Input Test. MICU Input Test

NO - Go to Gauge Control Module Input Test. Gauge Control Module Input Test

DTC B1255: Combination Switch Control Unit Lost Communication With MICU

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Check for DTCs with the HDS.

Is DTC B1255 indicated?

YES - Go to step 4.

NO - Intermittent failure, MICU is OK at this time. Check for loose or poor connection at combination switch control unit connector (8P), and at under-dash fuse/relay box connector X (39P). If the connections are good, check the battery condition and the charging system.

4. Check for DTCs with the HDS.

Are DTCs B1055, B1157 and B1806 indicated?

YES - Go to MICU Input Test. MICU Input Test

NO - Replace the combination switch control unit.