Diesel Data: Automotive Repair

Recirculation Control Motor Test (4-Door A/T Without Climate Control)




Recirculation Control Motor Test

4-door with A/T

NOTE: Before testing, check for HVAC DTCs. How to Troubleshoot the Heating and A/C Systems

1. Disconnect the 7P connector from the recirculation control motor.

NOTICE
Incorrectly applying power and ground to the recirculation control motor will damage it. Follow the instructions carefully.


2. Connect battery power to the No. 1 terminal of the recirculation control motor, and ground either the No. 5 or No. 7 terminal; the recirculation control motor should run smoothly. To avoid damaging the recirculation control motor, do not reverse power and ground immediately when the motor stops. Disconnect the No. 5 or No. 7 terminal from ground; the recirculation control motor should stop at Fresh (when the No. 7 terminal is disconnected) or Recirculate (when the No. 5 terminal is disconnected). Do not leave the motor connected to power and ground for long periods of time.

3. If the recirculation control motor did not run in step 2, remove it, then check the recirculation control linkage and doors for smooth movement.
- If the linkage and doors move smoothly, replace the recirculation control motor. Recirculation Control Motor Replacement

- If the linkage or doors stick or bind, repair them as needed.