Smart Junction Box (SJB)

WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

The SJB uses the medium speed CAN for communication with the diagnostic tool and other modules on the medium speed CAN. The SJB is equipped on all vehicles and is a combination of a multifunction module and an interior power junction box. The SJB controls multiple systems, which include:

Warning chimes
Illuminated entry
Exterior lamps
Backlogging
Horn
Interior lamps
Power door locks
Smart locks
Remote keyless entry (RKE) keypad
RKE system
Front windshield wiper
Heated rear window

Check the medium speed CAN circuits between the SJB C2280d and the DLC C251. The total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms, there is an open circuit in the medium speed CAN, damage to the DLC C251, or damage to the SJB C2280d.

For additional warning chimes information, refer to WARNING DEVICES .

For additional exterior illumination information, refer to EXTERIOR LIGHTING .

For additional backlighting information, refer to INSTRUMENT CLUSTER AND PANEL ILLUMINATION .

For additional horn information, refer to HORN .

For additional interior illumination information, refer to INTERIOR LIGHTING .

For additional SJB information, refer to MULTIFUNCTION ELECTRONIC CONTROL MODULES .

For additional power door lock and RKE information, refer to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS .

For additional front windshield wiper information, refer to WIPERS AND WASHERS .

For additional heated rear window information, refer to GLASS, FRAMES AND MECHANISMS .