Body Control Systems: Description and Operation

MODULE CONTROLLED FUNCTIONS

There are 3 multifunction electronic modules on this vehicle, they include the smart junction box (SJB), the driver door module (DDM) and the driver seat module (DSM).

Smart Junction Box (SJB)
The SJB is a combination of a multifunction electronic module and an interior fuse panel. SJB functions control multiple vehicle systems, which include:
- Battery saver relay
- Brake shift interlock
- Delayed accessory
- Exterior lighting
- Global open (front windows only) and moonroof (MKZ only, if equipped)
- Heated rear window
- Horn
- Interior lighting
- Perimeter anti-theft
- Power locks
- Remote keyless entry (RKE)
- Windshield wiper

Driver Door Module (DDM)
The DDM (if equipped), is located under the LH front door panel. It works to control the memory functions of the exterior driver memory mirror and in conjunction with the driver seat module (DSM) (located under the driver seat), indirectly controls the memory seat functions. It also controls the lock and unlock functions of the driver door lock actuator on vehicles with memory and receives lock/unlock input information from the door lock key cylinder switch and reset information from the driver door lock actuator.

Driver Seat Module (DSM)
The DSM (if equipped), controls the exterior passenger memory mirror and the memory seat functions.