Manufacturer Code Charts: 8

HVAC DTC Troubleshooting: 8

DTC indicator 8: A Short in the Recirculation Control 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 8 indicated?
YES - Go to step 4.

NO - Intermittent failure. Check for damaged wires or connections in the recirculation control motor circuit.


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

5. Test the recirculation control motor. Recirculation Control Motor Test (2-Door Without Climate Control)

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

NO - Replace the recirculation control motor. Recirculation Control Motor Replacement


6. Disconnect the recirculation control motor 7P connector.

7. Disconnect the HVAC control unit 24P connector.

8. Check for continuity between body ground and the HVAC control unit 24P connector No. 13 and No. 20 terminals individually.

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

NO - Go to step 9.






9. Check for continuity between the HVAC control unit 24P connector No. 13 and No. 20 terminals.

Is there continuity?
YES - Repair short in the wires.

NO - Go to step 10.






10. Turn the ignition switch to ON (II), and check the same terminals for voltage between each terminal and body ground.

Is there any voltage?
YES - Repair short to power in the wire(s) between the HVAC control unit and the recirculation control motor. This short may also damage the HVAC control unit. Repair short to power before replacing the HVAC control unit.

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