B1240

DTC indicator P or DTC B1240: A Problem in the Driver's Mode Control Linkage, Doors, 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 self-diagnostic or HDS.

Is DTC P or B1240 indicated?

YES - Go to step 4.

NO - Intermittent failure.

4. Turn the ignition switch OFF.
5. Test the driver's mode control motor.

Is the driver's mode control motor OK?

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

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