Pacifica V6-3.8L VIN L (2005)
Air Door Actuator / Motor: Description and Operation
Rear Mode Door Actuator
Mode Door Actuator
The mode door actuator used in the rear center floor console when equipped with the automatic temperature control (ATC) heating-A/C system, is a
reversible, 12-volt direct current (DC), servo motor. The rear mode door actuator is located in the rear blower motor housing within the center floor
console. The rear mode door actuator is mechanically connected to the two floor console mode-air doors.
The rear mode door actuator is interchangeable with the actuator for the front mode-air doors, front blend-air doors and the recirculation-air door. Each
actuator is contained within an identical black molded plastic housing with an integral wire connector receptacle. Each actuator also has an identical
output shaft with splines that connects it to its respective door linkage and two integral mounting tabs that allow the actuator to be secured to the rear
blower motor housing. The rear mode door actuator does not require mechanical indexing to the rear mode-air door linkage, as it is electronically
calibrated by the A/C-heater control.
The A/C-heater control must be recalibrated each time an actuator motor is replaced.
The mode door actuator for the center floor console is connected to the A/C-heater control through the vehicle electrical system by a dedicated two-wire
lead and connector of the body wire harness. The rear mode door actuator can move the two floor console mode-air doors in two directions. When the
A/C-heater control pulls the voltage on one side of the motor connection high and the other connection low, the mode-air doors will move in one
direction. When the A/C-heater control reverses the polarity of the voltage to the motor, the mode-air doors move in the opposite direction.
When the A/C-heater control makes the voltage to both connections high or both connections low, the mode-air doors stop and will not move.
The A/C-heater control uses a feedback signal positioning system to monitor the operation and relative position of the rear mode door actuator and the
mode-air doors. The A/C-heater control learns the mode-air doors stop positions during the calibration procedure and will store a diagnostic trouble code
(DTC) for any problems it detects in the rear mode door actuator circuits.
The rear mode door actuator is diagnosed using a DRBIII(R) scan tool.
The rear mode door actuator cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.