Body Control Systems: Description and Operation

Module Controlled Functions

Smart Junction Box (SJB)

NOTE: The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

The SJB is a combination of a multifunction electronic module and an interior fuse panel. The SJB functions control multiple vehicle systems which include:

- Battery saver
- Convertible top (if equipped)
- Convertible top drop window function (if equipped)
- Exterior lighting
- Heated rear window
- Interior lighting
- Perimeter anti-theft (if equipped)
- Power locks
- Remote Keyless Entry (RKE)
- Tire Pressure Monitoring System (TPMS)
- Interfacing with the Instrument Cluster (IC) for the TPMS warning lamp and other warning chimes

The SJB is located behind the RH A-pillar lower trim panel.

Refer to Smart Junction Box (SJB) Service and Repair in the removal and installation.

For the perimeter anti-theft, refer to Antitheft and Alarm Systems.

For the battery saver, heated rear window, and power windows, refer to Windows.

For the convertible top, refer to Convertible Top. Convertible Top

For the exterior lighting, refer to Lighting and Horns. Testing and Inspection

For the interior lamps and illuminated entry, Refer to Courtesy Lamp. Testing and Inspection

For the power door locks, and the RKE system, refer to Locks.

For the TPMS, refer to Tire Monitoring System. Tire Monitoring System

For the warning chimes, refer to Instrument Panel, Gauges and Warning Indicators.