Principles of Operation: Notes

WARNING: This page is about a different car, the 2009 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.

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 one 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 by 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 communicates via the Medium Speed Controller Area Network (MS-CAN).

The SJB controls the power door lock system. The SJB monitors the door lock/unlock switch inputs from the interior door lock switches. When the SJB receives an unlock/lock command from any door lock control switch, the module activates the door lock actuators. Refer to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS .

The SJB also controls the following remote lock/unlock features:

Remote Keyless Entry (RKE) transmitter lock/unlock
Panic alarm (button is part of the RKE transmitter)
Keyless entry keypad

The SJB controls the autolamp subsystem. The autolamp subsystem provides light-sensitive automatic on/off control of the headlamps and parking lamps. Refer to EXTERIOR LIGHTING .

The SJB controls the battery saver, delayed accessory function, exterior and interior lighting and the horn.

The SJB controls the Tire Pressure Monitoring System (TPMS).