Durango 2WD V8-5.7L Hybrid (2009)
direction. When the A/C-heater control reverses the polarity of the voltage to the motor, the mode-air door(s) moves in the opposite direction.
When the A/C-heater control makes the voltage to both connections high or both connections low, the mode-air door(s) stops and will not move. The
A/C-heater control uses a pulse-count positioning system to monitor the operation and relative position of the floor/defrost and panel door actuators and
the mode-air doors. The A/C-heater control learns the mode-air door stop positions during the calibration procedure and will store a diagnostic trouble
code (DTC) for any problems it detects in the mode door actuator circuits.
The mode door actuators are diagnosed using a scan tool See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Diagnostic Trouble Code Tests and Associated Procedures.
The mode door actuators cannot be adjusted or repaired and must be replaced if inoperative or damaged.
Rear
OPERATION
The rear mode door actuator is connected to the A/C-heater control through the vehicle electrical system by a dedicated two-wire lead and connector of
the rear heater-A/C wire harness. The rear mode door actuator can move the rear model-air door 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 rear mode-air door will move in one direction. When the A/C-heater
control reverses the polarity of the voltage to the motor, the rear mode-air door moves in the opposite direction.
When the A/C-heater control makes the voltage to both connections high or both connections low, the rear mode-air door stops and will not move. The
A/C-heater control uses a pulse-count positioning system to monitor the operation and relative position of the rear mode door actuator and the rear
mode-air door. The A/C-heater control learns the rear mode-air door 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 circuit.
The rear mode door actuators are diagnosed using a scan tool See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Diagnostic Trouble Code Tests and Associated Procedures.
The rear mode door actuator cannot be adjusted or repaired and must be replaced if inoperative or damaged.
Recirculation Door Actuator - Description
DESCRIPTION
The recirculation door actuator (1) is a reversible, 12 volt direct current (DC), servo motor. The recirculation door actuator is located on the left side of
the HVAC air inlet housing. The recirculation door actuator is interchangeable with the actuators for the blend-air door and the mode-air doors. Each
actuator is contained within an identical black molded plastic housing with an integral wire connector receptacle. Three integral mounting tabs allow the
actuator to be secured to the air inlet housing. Each actuator also has an identical output shaft with splines that connects it to the recirculation-air door.
The recirculation door actuator does not require mechanical indexing to the recirculation-air door, as it is electronically calibrated by the A/C-heater
control.
Recirculation Door Actuator - Operation
OPERATION
