B1240

DTC B1240 or DTC indicator M: A Problem in the Mode Control Linkage, Doors, or Motor

1. Clear the DTC.
2. Turn the ignition switch OFF, and then ON (II).
3. Operate the climate control system in several modes.
4. Check the DTCs.

Is DTC B1240 or M indicated?

YES - Go to step 5.

NO - Intermittent failure.

5. Turn the ignition switch OFF.
6. Test the mode control motor.

Is the mode control motor and linkage OK?

YES - Substitute a known-good audio-HVAC display panel, and recheck. If the symptom/indication goes away, replace the original audio HVAC display panel.

NO - Replace the mode control motor, or repair the mode control linkage or doors.