Principles of Operation

Locks, Latches and Entry Systems






Principles of Operation

NOTE: The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

Power Door Locks

The SJB controls the door locks, Remote Keyless Entry (RKE) system, and the memory locking feature. The normal path of the actuators is to ground through the SJB. The door lock control switch locks and unlocks all doors by grounding the appropriate circuit to the SJB. The SJB then supplies power to the appropriate common actuator circuit to lock or unlock all the doors.

NOTE: For vehicles equipped with E-Guard Cargo Protection System(TM), the side and rear cargo doors will not unlock electronically or from the interior door lock rod.

The sliding door memory lock feature locks the sliding door in the event that a lock command was issued by the operator while the sliding door was open. Since the door lock actuators are located in the sliding door, power is supplied to the actuators through the contact plate. When the sliding door is opened, the circuit is also opened. If a lock command is issued through the RKE transmitter or door lock control switches and the sliding door is opened, the memory lock feature stores the command and issues the lock signal to the door lock actuators once the sliding door is closed.

Remote Keyless Entry (RKE)

The SJB receives input from programmed RKE transmitters. Based on input from the RKE transmitter, the SJB:

- Locks all doors
- Unlocks the driver door (when stepped unlock is enabled)
- Unlocks all doors
- Activates/deactivates the panic alarm
- Turns the interior lamps on (when unlocking) and off (when locking)
- Sounds the horn once when LOCK is pressed twice within 3 seconds, and the doors are closed
- Sounds the horn twice when LOCK is pressed twice within 3 seconds, and any door is open
- Flashes the turn signals once for each time LOCK is pressed, and the doors are closed
- If any door is open, the turn signals will not flash when LOCK is pressed until all doors are closed.