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.

NO - Go to Gauge Control Module Input Test.

DTC B1806: Power Seat 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 B1806 indicated?

YES - Go to step 4.

NO - Check for poor connections. If OK, check battery condition and charging system.

4. Check for DTCs with the HDS.

Are DTC B1055, B1157 and/or B1255 indicated?

YES - Go to step 7.

NO - Go to step 5.

5. Turn the ignition switch OFF.
6. Do the power seat control unit input test.

Is the input test OK?

YES - Faulty power seat control unit.

NO - Refer to the power seat control unit input test and correct the cause.

7. Turn the ignition switch OFF.
8. Do the multiplex integrated control unit input test.

Is the input test OK?

YES - Faulty multiplex integrated control unit.

NO - Refer to the multiplex integrated control unit input test and correct the cause.