Recirculation Control Motor Test

Recirculation Control Motor Test

NOTE: Before testing the motor, check for HVAC DTCs Initial Inspection and Diagnostic Overview.

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 terminal No. 1 of the recirculation control motor, and ground terminal No. 2; the recirculation control motor should run smoothly, and stop at Recirculate. If it doesn't, reverse the connections; the recirculation control motor should run smoothly, and stop at Fresh. When the recirculation control motor stops running, disconnect battery power immediately.





3. If the recirculation control motor did not run in step 2, remove it, then check the recirculation control linkage and door for smooth movement.

- If the linkage and door move smoothly, replace the recirculation control motor Recirculation Control Motor Replacement.
- If the linkage or door stick or bind, repair them as needed.
- If the recirculation control motor runs smoothly, go to step 4.

4. Use a digital multimeter with an output of 1 mA or less at the 20 kOhms range. Operate the recirculation control motor running as in step 2, and check for continuity between terminals No. 3, 4, and 5 and terminal No. 7 individually. There should be continuity for a moment at each terminal as the motor through its travel.

5. If there is no continuity for a moment at each terminal, replace the recirculation control motor Recirculation Control Motor Replacement.