Aspen 2WD V8-4.7L (2007)
The two mode door actuators (floor/defrost and panel door) (1) are reversible, 12-volt direct current (DC), servo motors. Both mode door actuators are
located near the drivers side end of the HVAC housing. The mode door actuators are mechanically connected to the floor/defrost and the panel-air door.
Both mode door actuators are interchangeable with each other and with the actuators for the blend-air door and the recirculation-air door. 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 top of the HVAC housing. Each actuator also has an identical output shaft with splines that connects it to the mode-air doors. The
mode door actuators do not require mechanical indexing to the mode-air doors, as they are electronically calibrated by the A/C-heater control.
Operation
OPERATION
The floor/defrost and panel (mode) door actuators are connected to the A/C-heater control through the vehicle electrical system by a dedicated two-wire
lead and connector of the HVAC wire harness. The mode door actuators can move the floor/defrost and the panel-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 door(s) will move in one
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.
The mode door actuators cannot be adjusted or repaired and must be replaced if found inoperative or damaged.
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
