Smart Junction Box (SJB)

Principles of Operation

NOTE: Upon installation of a new SJB, the module must be reconfigured. See PROGRAMMABLE MODULE INSTALLATION in Body and Accessories - Control System prior to SJB removal.

The SJB receives inputs and delivers outputs to a majority of the electronically-controlled features of the vehicle. The SJB constantly monitors the systems under its control and reports a concern in the form of a diagnostic trouble code (DTC). The DTC can be retrieved with a WDS or equivalent tester through the ISO 9141 communication network. The SJB receives its voltage input from the battery junction box (BJB), and controls the following features:
- front wiper and washer
- battery saver
- illuminated entry and interior lighting
- driver one-touch down power window (optional)
- battery saver relay
- remote keyless entry (RKE) (optional)
- power lock system (optional)