DTC 7

DTC 7: An Open 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 the following terminals of heater control panel connectors A (14P) and B (22P) and the air mix control motor 5P connector.
14P: 5P:
No. 1 No. 5
No. 2 No. 4
No. 3 No. 2
No. 9 No. 1

22P: 5P:
No. 6 No. 3

Is there continuity?

YES - Check for loose wires or poor connections at heater control panel connectors A (14P) and B (22P) and at the air mix control motor 5P connector. If the connections are good, 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.

NO - Repair any open in the wire(s) between the heater control panel and the air mix control motor.