Bonneville V8-4.6L VIN Y (2004)
Power Door Lock Actuator: Description and Operation
DOOR LOCK ACTUATORS
The CTD system uses the door jamb switches that are internal to the door lock actuators as one method to activate the alarm. The door modules monitor
the door jamb switch via a discrete input to the appropriate door module. When the door is open the door jamb switch grounds the door open input to the
door module. The CTD system uses the driver door unlock switch that is internal to the driver door lock actuator to disarm an armed system. The driver
door module (DDM) monitors the driver door unlock switch via a discrete input. When the lock cylinder is turned to the unlock position the switch
grounds the disarm input to the DDM.
POWER DOOR LOCK MOTORS
Each door module supplies battery voltage and ground, through the door lock actuator motor control circuits to its associated door lock actuator motor.
The power door lock motors are reversible. The function performed by the lock motor, Lock or Unlock, depends on which motor control circuit the
voltage is applied to, and which motor control circuit the ground is applied to. To perform a lock function, the door module applies voltage to the door
lock motor Lock circuit, and ground to the door lock motor Unlock circuit. To perform an Unlock function, the door module reverses the polarity,
applying voltage to the door lock motor Unlock circuit, and ground to the door lock motor Lock circuit.
