4. Change the dimmer switch from low beam to high beam and wait for 2 seconds.
5. Pull and hold the combination light switch lever, and hold the passing switch position for at least 2 seconds.
6. 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.?
7. Turn the ignition switch to LOCK (0).
8. Do the combination light switch test See: Lighting and Horns/Sensors and Switches - Lighting and Horns/Combination Switch/Service and
Repair 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.?
B1280
DTC Troubleshooting: B1280
DTC B1280:
Turn Signal Switch Circuit Malfunction
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain
Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting
- B-CAN System Diagnosis Test Mode A.
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Turn the turn signal switch to left position and wait for 2 seconds, then turn to right position and wait for 2 seconds.
4. Check for DTCs with the HDS.
Is DTC B1280 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the turn signal switch circuit is OK at this time. Check for loose or poor connections.?
5. Turn the ignition switch to LOCK (0).
6. Do the combination light switch test See: Lighting and Horns/Sensors and Switches - Lighting and Horns/Combination Switch/Service and
Repair and check for open or short in the turn signal switch terminals in each switch position.
Is the turn signal switch OK?
YES -
Faulty combination switch control unit, replace the wiper/washer switch.?
