Sprinter 2500 V6-3.0L DSL Turbo VIN 45 (2007)
Operation
OPERATION
The recirculation door actuator is connected to the A/C-heater control through the vehicle electrical system by a dedicated wire lead and connector of the
HVAC wire harness. The recirculation door actuator can move the recirculation-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 recirculation-air door will move in one direction. When the A/C-heater
control reverses the polarity of the voltage to the motor, the recirculation-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 recirculation-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 recirculation door actuator and the
recirculation-air door. The A/C-heater 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 recirculation door actuator circuits.
The recirculation door actuator is diagnosed using a scan tool.
The recirculation door actuator cannot be adjusted or repaired and must be replaced if inoperative or damaged.
