Principles and Operation

PRINCIPLES OF OPERATION

NOTE: The smart junction box (SJB) is also known as the generic electronic module (GEM).

Power Locks
The SJB monitors the door lock control switches. When the SJB receives an unlock/lock command from either door lock control switch, the SJB energizes a relay (internal to the SJB) to supply the correct power and grounds for the door lock actuators.

Liftgate Glass Release
The SJB monitors the liftgate glass release switch. The doors must be unlocked electronically in order for the SJB to release the liftgate glass latch. When this condition is met and the SJB receives a request from the liftgate glass release switch, the SJB provides power to the latch release motor.

Keyless Entry Keypad
The SJB monitors the keyless entry keypad input. When the correct codes are entered into the SJB, the SJB carries out functions associated with the code entered. Based on input from the keypad, the SJB:
- Locks all doors
- Unlocks the driver door
- Unlocks all doors
- Enters programming mode
- Enables/disables the autolock feature
- Enables/disables the auto-unlock feature
- Releases the liftgate glass latch

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 (with stepped unlock enabled)
- Unlocks all doors
- Releases the liftgate glass latch
- Activates/deactivates the panic alarm
- Turns the interior lamps on (when unlocking) and off (when locking), provided the defeat switch on the dimmer switch is not active
- 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/ajar