DTC 8

DTC 8: A Short in the Air Mix Control Motor Circuit

1. Disconnect the air mix control motor 7P connector.
2. Disconnect the heater control panel 30P connector.




3. Check for continuity between body ground and heater control panel 30P connector terminals No.1, 2, 11, 13, and 14 individually.

Is there continuity?

YES - Repair any short to body ground in the wire(s) between the heater control panel and the 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 any short to power in the wire(s) between the heater control panel and the air mix control motor. This short also may damage the heater control panel. Repair the short to power before replacing the heater control panel.

NO - Go to step 5.

5. Substitute a known-good air mix control motor and retest.

Did the symptom/indication go away?

YES - The original air mix control motor is faulty, replace it.

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