Manufacturer Code Charts: 8

Control System DTCs

HVAC DTC Troubleshooting: 8

DTC indicator 8 : A Short in the Recirculation Control Motor Circuit

1. Problem verification:

-1. Turn the ignition switch to LOCK (0), and then back 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 2.
-NO- Intermittent failure. Check for loose wires or poor connections on the recirculation control motor circuit.

2. Shorted wire check (RFD-P, SENSOR 5V lines):

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connectors.






-3. Check for continuity between test points 1 and 2 individually.














Is there continuity?
-YES- Repair a short to body ground in the wire(s) between the HVAC control unit and the recirculation control motor.
-NO- The RFD-P and SENSOR 5V wires are OK. Go to step 3.

3. Recirculation control motor check:

-1. Test the recirculation control motor Recirculation Control Motor Test.

Is the recirculation control motor OK?
-YES- Replace the HVAC control unit HVAC Control Unit Removal And Installation.
-NO- Replace the recirculation control motor Recirculation Control Motor Removal And Installation.