DTC B1275: Combination Light Switch OFF Position Circuit Malfunction; DTC B1276: Combination Light Switch Parking Light Position Circuit Malfunction; DTC B1277: Headlight Switch AUTO Position Circuit Malfunction; DTC B1278: Headlight Switch ON Position Circuit Malfunction
WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 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 to ON (II).
- Operate each combination light switch position for at least 2 seconds, then turn the combination light switch OFF.
- Check for DTCs with the HDS.
Is DTC B1275, B1276, B1277 and/or B1278 indicated?
YES -Go to step 5.
NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- Turn the ignition switch to LOCK (0).
- Do the combination light switch test
and check for open or short in the combination light switch terminals in each switch position.
Is the combination light switch OK?
YES -Faulty combination switch control unit, replace the wiper/washer switch.
NO -Replace the combination light switch.