Principles of Operation: Notes

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

NOTE: The time-out for the battery saver relay and the accessory delay relay (both are controlled by the SJB ) is 1 minute if the vehicle has less than 80 km (50 miles). Once the vehicle passes the approximate mileage threshold of 80 km (50 miles), the time-out for both relays is 10 minutes, as described in the Owner's Literature. For the battery saver relay, refer to INTERIOR LIGHTING . For the accessory delay relay, refer to GLASS, FRAMES AND MECHANISMS .

The SJB is a multifunction electronic module that controls many of the vehicle systems. Most of the SJB functions utilize hardwired inputs and/or outputs. The SJB controls the following hardwired functions, using the corresponding inputs and outputs:

FUNCTION TABLE

Function	Input(s)	Output(s)
Accessory delay	Master power window switch Power sliding roof switch Audio Control Module (ACM)	Accessory delay relay
Autolamps (if equipped)	Headlamp switch Ambient light sensor	Exterior lamps
Battery saver	Internal to SJB	Battery saver relay
Daytime Running Lamps (DRL) (if equipped)	Ignition switch status Parking brake status	Low beam headlamps
Luggage compartment lid release	Luggage compartment lid release switch	Luggage compartment lid release relay
Fog lamps (if equipped)	Headlamp switch	Fog lamp relay
Headlamps (low beam)	Headlamp switch	Low beam headlamps
Headlamps (high beam and flash-to-pass)	Headlamp switch Multifunction switch	High beam relay
Heated rear window	Heated rear window switch	Heated rear window relay (internal to BJB )
Horn	Horn switch	Horn relay (internal to SJB )
Parking lamps	Headlamp switch	Parking lamps relay (internal to SJB )
Power door locks	Driver door lock control switch Passenger door lock control switch	Door lock/unlock relays (internal to SJB )
Remote Keyless Entry (RKE) system	Keyless entry keypad RKE transmitter (part of the Integrated Keyhead Transmitter (IKT) key)	Power door lock relays Parking lamps Horn
Stoplamps	Stoplamp switch	Stoplamps
Turn signal/hazard lamps	Multifunction switch Hazard lamps switch	Turn signal/hazard lamps

The SJB is involved in other vehicle systems through communication over the Medium Speed Controller Area Network (MS-CAN). For a detailed list of SJB network inputs and outputs, refer to the Principles of Operation in MODULE COMMUNICATIONS NETWORK .

Some SJB parameters are programmable. Two types of programmable parameters are available: module configuration and programmable parameters. Refer to MODULE CONFIGURATION .