DTC J

DTC indicator J: A Short in the Front Air Mix Control Motor Circuit

1. Test the front air mix control motor.

Is the front air mix control motor OK?

YES - Go to step 2.

NO - Replace the front air mix control motor.

2. Disconnect the front air mix control motor 7P connector.
3. Disconnect climate control unit connector B (30P), and gauge control module connector B (36P).
4. Check for continuity between body ground and climate control unit connector B (30P) terminals No.17 and No.23 individually.






Is there continuity?

YES - Repair short to body ground in the wire(s) between the climate control unit, the gauge control module, and the front air mix control motor.

NO - Go to step 5.

5. Turn the ignition switch ON (II), and check the same terminals for voltage.






Is there any voltage?

YES - Repair short to power in the wire(s) between the climate control unit, the gauge control module, and the front air mix control motor. This short may also damage the climate control unit. Repair the short to power before replacing the climate control unit.

NO - Substitute a known-good front air mix control motor, and recheck. If the symptom/indication goes away, replace the original front air mix control motor. If the symptom/indication continues, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.