B1235

DTC Troubleshooting: B1235 (DrA/M motor lock)

DTC B1235 or DrA/M motor lock is indicated:

A Problem in the Air Mix Control motor circuit, Linkage, Door, or Motor (driver's)

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 B1235 or DrA/M motor lock indicated?

YES -

Go to step 5.

NO -

Intermittent failure.

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

6. Test the driver's air mix control motor Driver's Air Mix Control Motor Test.

Is the driver's air mix 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 driver's air mix control motor Driver's Air Mix Control Motor Replacement, or repair the driver's air mix control linkage or door.