Liberty Sport 2WD L4-2.4L VIN 1 (2002)
Trunk / Liftgate Lock Cylinder: Description and Operation
TAILGATE CYLINDER LOCK SWITCH
The tailgate cylinder lock switch is integral to the key lock cylinder inside the tailgate. The tailgate cylinder lock switch is a normally-open
momentary switch that is hard wired directly to the Body Control Module (BCM), and closes a path to ground through an internal resistor when
the lock cylinder is rotated to the unlock or lock position.
The tailgate cylinder lock switch cannot be adjusted or repaired.
The tailgate cylinder lock switch is actuated when the key is inserted in the lock cylinder and turned to the unlock or lock position. The tailgate
cylinder lock switch closes a path to ground through an internal resistor for the Body Control Module (BCM) when the tailgate key lock cylinder is
in the lock or unlock position, and opens the ground path when the lock cylinder is in the neutral position. The BCM reads the switch status, then
sends the proper switch status messages to other electronic modules over the Programmable Communications Interface (PCI) data bus network.
The tailgate cylinder lock switch unlock status message is used by the BCM as an input for Vehicle Theft Security System (VTSS) operation and
to tell the BCM to lock or unlock the tailgate. There is no mechanical linkage between the tailgate key cylinder and the latches.