Principles of Operation: Notes
WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. 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).
When a door or liftgate is ajar with the vehicle speed less than 15 km/h (9 mph) or 5 km/h (3 mph) for puddle lamps, or the instrument panel dimmer switch is in the DOME LAMP position, the SJB provides voltage to the interior courtesy and puddle lamp circuits. The SJB controls all interior lighting functions and timing by monitoring inputs from the door ajar switches, the liftgate ajar switch, the Liftgate/Trunk Module (LTM) (if equipped with a power liftgate), the instrument panel dimmer switch, the Remote Keyless Entry (RKE) transmitter and vehicle speed.