B1009

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.

Are DTCs B1156 and B1063 also indicated?

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