DTC B1279: Headlight Switch DIMMER Position Circuit Malfunction
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).
- Turn the headlight switch ON.
- Change the DIMMER switch from low beam to high beam and wait for 2 seconds.
- Pull and hold the combination light switch lever, and hold the passing switch position for more than 2 seconds.
- Check for DTCs with the HDS.
Is DTC B1279 indicated?
YES - Go to step 7.
NO - Intermittent failure, the headlight switch DIMMER circuit is OK at this time. Check for loose or poor connections.
- Turn the ignition switch to LOCK (0).
- Do the combination light switch test (see COMBINATION LIGHT SWITCH TEST/REPLACEMENT
) 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.