Principles of Operation: Notes
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. 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 vehicle door is ajar with the vehicle speed less than 15 km/h (9 mph) or 5 km/h (3 mph) for puddle lamps, or a request from the instrument panel dimmer switch is received, 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 instrument panel dimmer switch, the Remote Keyless Entry (RKE) transmitter and vehicle speed.