DTC 8

DTC 8: A Short In The Air Mix Control Motor Circuit

1. Test the air mix control motor.

Does the air mix control motor test OK?

YES - Go to step 2.

NO - Replace the air mix control motor.

2. Disconnect the air mix control motor 5P connector.
3. Disconnect heater control panel connectors A (14P) and B (22P).




4. Check for continuity between body ground and heater control panel connector A (14P) terminals No. 1, 2, 3, and 9 individually, and between body ground and heater control panel connector B (22P) terminal No. 6.

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 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 heater control panel and the air mix control motor. This short may also damage the heater control panel. Repair the short to power before replacing the heater control panel.

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 heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel.