Grand Cherokee 2WD V8-4.7L VIN J (2004)
Door Switch: Description and Operation
Liftgate Ajar Switch
The two liftgate ajar switches are integral to the two liftgate latch mechanisms. The two liftgate ajar switches are aduated by the liftgate latch
mechanisms, and are hard wired with each other between a body ground and the Body Control Module (BCM) through the liftgate and body wire
harnesses.
The liftgate ajar switches cannot be adjusted or repaired and, if faulty or damaged, the liftgate latch unit must be replaced.for the service procedures. For
complete circuit diagrams, refer to the appropriate wiring information.
Each of the liftgate ajar switches can close a path to ground for the BCM when the liftgate is opened, and opens the ground path when the liftgate is
closed. The BCM reads the switch status then sends the proper switch status message to other modules over the Programmable Communications
Interface (PCI) data bus network. The liftgate ajar switch status message is used by the BCM as an input for Vehicle Theft Security System (VTSS)
operation.
