DTC 7

DTC 7: An Open in the Air Mix Control Motor Circuit

1. Disconnect the air mix control motor 7P connector.
2. Disconnect heater control panel connectors A (14P) and B (22P).




3. Check for continuity between the following terminals of heater control panel connectors A (14P) and B (22P) and the air mix control motor 7P connector.

14P: 7P:
No.1 No.5
No.2 No.7
No.3 No.1
No.9 No.2

22P: 7P:
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 7P 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.