Principles of Operation

PRINCIPLES OF OPERATIONS

The Door Lock Function
When a door lock control switch is moved into the lock position or a door lock cylinder is rotated to the lock position, a ground is provided to the lock circuit input to the generic electronic module (GEM). The GEM then provides 12 volts to one side of the door lock actuators contained in the door latch assembly and simultaneously grounds the other side of the door lock actuators. This completes the door lock actuator circuit, causing the door lock actuators to rotate a cam assembly, which then locks the doors.

The Door Unlock Function
When a door lock control switch is moved into the unlock position, the door lock switch grounds the unlock circuit input to the GEM. The GEM then provides 12 volts to the opposite side (relative to locking the door) of the door lock actuator(s) contained in the door latch assembly and simultaneously grounds the other side of the door lock actuator(s). This completes the door lock actuator circuit, causing the door lock actuator(s) to rotate a cam assembly in the opposite direction, which then unlocks the door(s).

The Liftgate/Luggage Compartment Lid Release
All vehicles are equipped with an interior liftgate/luggage compartment lid release switch. The wagon has an interior liftgate release switch and an exterior liftgate release switch. When either switch is pressed, it grounds an input circuit to the GEM. When the GEM senses the ground, it sends 12 volts to cycle the liftgate latch (3-door) or the central junction box (CJB) liftgate/luggage compartment lid relay (5-door, wagon and sedan). The switches only work when the alarm is disarmed.

Door Lock Cylinder Functions
Both the driver and passenger doors can be locked from the driver door lock cylinder. When the ignition key is inserted into the door lock cylinder and is rotated into the lock position, the linkage moves to rotate a cam in the door latch assembly. When the cam in the door latch rotates, it mechanically moves the door latch into the locked position. The other doors are locked or unlocked electronically.

Central
The door lock cylinder locks all doors when the key in the driver door lock cylinder is turned once to the lock position. Central unlocking of the doors can be accomplished by turning the key once to the unlock position to unlock the driver door and turning it a second time to the unlock position within 3 seconds without the vehicle being relocked.

Computer Operated Locks
Each front door lock actuator contains a bipolar motor that controls the lock and unlock linkage. The lock/unlock levers of both front door interior handles use linkages to actuate the lever lock switch located inside each front door lock actuator. The GEM uses only one electrical input for both lever lock switches. The GEM cannot determine whether the driver or passenger door lever lock switch was actuated. Therefore, actuating the lock feature from either front door lock button locks all doors.

The door lock control switches for both front doors also use only one input to the GEM.

Both rear passenger doors contain a rear door lock actuator that controls only electric lock or unlock of that door. Actuating the lock/unlock lever at either rear passenger door has no effect on the other doors.

Autolock
The autolock feature locks all door when all the doors, including the rear doors (if equipped) are closed, the brake pedal is pressed with the key in the RUN or START position, and the vehicle speed then exceeds 7 km/h (5 mph) or higher. This feature relocks the doors (if any doors were open) after the brake pedal is pressed, once all the doors are read as closed and vehicle speed exceeds 7 km/h (5 mph). The autolock feature can be enabled/disabled.