Sentra L4-1.8L (QG18DE) (2004)
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Air Door Actuator / Motor: Description and Operation
INTAKE DOOR MOTOR
The intake door motor is installed on the intake unit. Using a link, it opens and closes the intake door.
When REC switch is ON, the ground line of the motor is switched from terminal 2 to 1. This starts the motor because the position switch contacts built
into it make current flow. When REC switch is OFF, the ground line is switched from terminal 1 to 2. The contacts turn along with the motor. When they
reach the non-current flow position, the motor will stop.