Electronic Climate Control

DTC B1246 or DTC indicator H: A Problem in the Rear Air Mix Control Linkage, Door, or Motor

1. Clear the DTC by turning the ignition switch OFF, and then ON (II).
2. Operate the climate control system in several modes.
3. Check for DTCs using the HDS or self-diagnostic.

Is DTC B1246 or H indicated?

YES - Go to step 4.

NO - Intermittent failure.

4. Turn the ignition switch OFF.
5. Test the rear air mix control motor.

Is the rear air mix control motor OK?

YES - Substitute a known-good rear climate control unit, and recheck. If the symptom/indication goes away, replace the original rear climate control unit.

NO - Replace the rear air mix control motor, or repair the rear air mix control" linkage or door.