DTC 4

DTC 4: A Short in the Rear Air Mix Control Motor Circuit

1. Disconnect the rear air mix control motor 7P connector.
2. Disconnect the rear heater-A/C control panel-unit 14P connector.




3. Check for continuity between body ground and the rear heater-A/C control panel-unit 14P connector terminals No.3, 5, 7, 9, and 12 individually.

Is there continuity?

YES - Repair any short to body ground in the wire(s) between the rear heater-A/C control panel-unit and the rear air mix control motor.

NO - Go to step 4.




4. 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 between the rear heater-A/C control panel-unit and the rear air mix control motor. This short may also damages the rear heater-A/C control panel-unit. Repair the short to power before replacing the rear heater-A/C control panel-unit.

NO - Substitute a known-good rear heater-A/C control panel-unit, and recheck. If the symptom/indication goes away, replace the original rear heater-A/C control panel-unit.