Heating

DTC Troubleshooting

21-15  

4-door

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

HEATER CONTROL PANEL CONNECTOR A (14P)

HEATER CONTROL PANEL CONNECTOR (22P)

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 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.

4-door

DTC 8: A Short 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 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.

HEATER CONTROL PANEL CONNECTOR A (14P)

Wire side of female terminals

HEATER CONTROL PANEL CONNECTOR B (22P)

Wire side of female terminals

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.