B1156

DTC B1009: MICU Lost Communication with the Combination Switch Control Unit (Wiper/Washer Switch Message)

1. Clear the DTCs using the HDS.
2. Cycle the ignition switch to OFF and then back ON.
3. Check for DTCs using the HDS.

Is DTC B1009 indicated?

YES - Go to step 4.

NO - Intermittent failure, the combination switch control unit is OK at this time. Check for loose or poor connections. If the connections are good, check the battery condition and the charging system.

4. Check for DTCs of the gauge control module and relay control module using the HDS.

Is DTC B1156 and B1063 indicated ?

YES - Go to the Combination Switch Control Unit Input Test.

NO - Check for an open, or a short to power or ground in the communication circuit between the MICU and the combination switch control unit. If the circuit is OK, replace the MICU. If the circuit is bad, repair the open, or short to power or ground.

DTC B1156: Gauge Control Module Lost Communication (Wiper Switch Message) with the Combination Switch Control Unit

1. Clear the DTCs using the HDS
2. Cycle the ignition switch to OFF and then back ON
3. Check for DTCs by selecting the DTCs MENU (DTCs) from the HDS

Is DTC B1156 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 by selecting the DTCs MENU (DTCs) of the HDS

Is DTC B1009 or B1063 indicated?

YES - Go to Combination Switch Control Unit Input Test

NO - Go to Gauge Control Module Input Test.