B1240

DTC Troubleshooting: B1240 (Mode motor lock)

DTC B1240 or Mode motor lock is indicated:

A Problem in the Mode Control motor circuit, Linkage, Door, or Motor

1. Clear the DTC with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Do the self-diagnostic with the HDS or the climate control unit.

4. Check for DTCs.

Is DTC B1240 or Mode motor lock indicated?

YES -

Go to step 5.

NO -

Intermittent failure.�

5. Turn the ignition switch to LOCK (0).

6. Test the mode control motor Mode Control Motor Test.

Is the 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 Climate Control Unit Removal/Installation.�

NO -

Replace the mode control motor Mode Control Motor Replacement, or repair the mode control linkage or doors.�