DTC B1957: Rear MICU Lost Communication with Combination Switch Control Unit (HLSW Message); DTC B1958: Rear MICU Lost Communication with Combination Switch Control Unit (WIPSW Message)
WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see
TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
).
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0), and then back ON (II).
- Wait for 6 seconds or more.
- Check for DTCs with the HDS.
Is DTC B1957 and/or B1958 indicated?
YES - Go to step 5.
NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections between the rear MICU and the combination switch control unit.
- Check for DTCs with the HDS.
Are DTCs B1007, B1062, B1063, B1155, B1156, B1957, B1958, and/or B2969 all indicated?
YES - Do the combination switch control unit input test (see WIPER/WASHER SWITCH (COMBINATION SWITCH CONTROL UNIT) INPUT TEST ).
NO - Do the rear MICU input test (see REAR MICU INPUT TEST ).