Durango 2WD V8-5.9L VIN Z LDC (2000)
Lock Cylinder Switch: Description and Operation
DOOR LOCK CYLINDER SWITCH
The door lock cylinder switches are mounted to the back of the key lock cylinder inside each front door. They are resistor multiplexed momentary
switches that are hard wired between a body ground and the Central Timer Module (CTM) through the front door wire harnesses. These switches
are driven by the key lock cylinders and contain three internal resistors. One resistor is used for the neutral switch position, one for the lock
position and one for the unlock position.
The door lock cylinder switches cannot be adjusted or repaired and, if faulty or damaged, they must be replaced.
The door lock cylinder switches are actuated by the key lock cylinder when the key is inserted in the lock cylinder and turned to the lock or unlock
positions. The door lock cylinder switch closes a path to ground through one of three internal resistors for the CTM when the front door key lock
cylinder is in the lock, unlock or neutral positions. The CTM reads the switch status through an internal pull-up, then uses this input and its internal
programming to control the proper Vehicle Theft Security System (VTSS) and power lock system outputs.
LIFTGATE LOCK CYLINDER SWITCH
The liftgate lock cylinder switch is mounted to the back of the liftgate key lock cylinder inside the lift- gate. It is a resistor multiplexed momentary
switch that is hard wired between a body ground and the Central Timer Module (CTM) through the liftgate wire harness. This switch is driven by
the key lock cylinder and contains three internal resistors. One resistor is used for the neutral switch position, one for the lock position and one for
the unlock position.
The liftgate lock cylinder switch cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.
The liftgate lock cylinder switch is actuated by the key lock cylinder when the key is inserted in the lock cylinder and turned to the lock or unlock
positions. The liftgate lock cylinder switch closes a path to ground through one of three internal resistors for the CTM when the liftgate key lock
cylinder is in the lock, unlock or neutral positions. The CTM reads the switch status through an internal pull-up, then uses this input and its internal
programming to control the proper Vehicle Theft Security System (VTSS) and power lock system outputs.
