Manufacturer Code Charts: 6

HVAC DTC Troubleshooting: 6

DTC indicator 6: A Problem in the Mode Control Linkage, Door, or Motor Circuit

4-door with M/T, 2 door

1. Turn the ignition switch to LOCK (0), and then to ON (II).

2. Do the self-diagnostic function with the HVAC control unit. How to Troubleshoot the Heating and A/C Systems

3. Check for DTCs.

Is DTC 6 indicated?
YES - Go to step 4.

NO - Intermittent failure, check for loose wires or poor connections on the mode control motor circuit.


4. Turn the ignition switch to LOCK (0).

5. Test the mode control motor.

Is the mode control motor OK?
YES - Go to step 6.

NO - Replace the mode control motor, Mode Control Motor Replacement or repair the mode control linkage or door.


6. Disconnect the mode control motor 7P connector.

7. Disconnect the HVAC control unit 24P connector.

8. Check for continuity between the following terminals of the HVAC control unit 24P connector and the mode control motor 7P connector.





Is there continuity?
YES - Go to step 9.

NO - Repair open in the wire(s) between the HVAC control unit and the mode control motor.






9. Check for continuity between body ground and the HVAC control unit 24P connector No. 7 and No. 8 terminals individually.

Is there continuity?
YES - Repair short to body ground in the wire(s) between the HVAC control unit and the mode control motor.

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