Operation

OPERATION

The rear recirculation door actuator is connected to the rear A/C control through the vehicle electrical system by a dedicated wire lead and connector of the rear A/C wire harness. The rear recirculation door actuator can move the rear recirculation-air door in two directions. When the rear A/C control pulls the voltage on one side of the motor connection high and the other connection low, the recirculation-air door will move in one direction. When the rear A/C control reverses the polarity of the voltage to the motor, the recirculation-air door moves in the opposite direction.

When the rear A/C control makes the voltage to both connections high or both connections low, the recirculation-air door stops and will not move. The rear A/C control uses a pulse-count positioning system to monitor the operation and relative position of the rear recirculation door actuator and the rear recirculation-air door. The rear A/C control learns the recirculation-air door stop positions during the calibration procedure and will store a diagnostic trouble code (DTC) for any problems it detects in the rear recirculation door actuator circuits.

The rear recirculation door actuator is diagnosed using a scan tool.

The rear recirculation door actuator cannot be adjusted or repaired and must be replaced if inoperative or damaged.