Principles of Operation

The SJB is a combination of a multifunction control module and an interior power junction box. SJB functions control multiple vehicle systems which include:

• Battery saver
• Convertible top (if equipped)
• Convertible top drop window function (if equipped)
• Exterior lighting
• Interior lighting
• Heated rear window
• Perimeter anti-theft (if equipped)
• Power locks
• Remote keyless entry (RKE)
• Tire pressure monitoring system (TPMS)
• Interfaces with the instrument cluster TPMS warning lamp and other warning chimes

The SJB is connected to the medium speed controller area network (MS-CAN) communication network. The SJB controls both interior and exterior lighting, body functions, active anti-theft functions (perimeter alarm), RKE functions, and the TPMS. The SJB receives wireless signals from both the RKE transmitters and the TPMS sensors via an external coaxial antenna.

Some SJB parameters are programmable and the programmable parameter that is available is vehicle configuration. Refer to MODULE CONFIGURATION for information concerning the programmable parameters in the SJB.