DTC J

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

1. Test the air mix control motor.

Is the air mix control motor OK?

YES - Go to step 2.

NO - Replace the air mix control motor.

2. Disconnect the air mix control motor 7P connector.
3. Disconnect climate control unit connector B (30P), and gauge assembly connector A (30P).




4. Check for continuity between body ground and climate control unit connector B (30P) terminals No. 3, 10, 11, 17, and 23 individually.

Is there continuity?

YES - Repair any short to body ground in the wire(s) between the climate control unit, the gauge assembly, and the 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 any short to power in the wire(s) between the climate control unit, the gauge assembly, and the 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 air mix control motor, and recheck. If the symptom/indication goes away, replace the original 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.