Principles of Operation
WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Upon installation of a new smart junction box (SJB), the module must be reconfigured. Refer to MODULE CONFIGURATION
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 diagnostic tool through the ISO 9141 communication network. The SJB receives power input from the battery junction box (BJB), and controls the following features:
- Front wiper and washer
- Warning chime (SJB communicates information to the instrument cluster)
- Battery saver
- Illuminated entry and interior lighting
- Driver one-touch down power window (optional)
- Battery saver relay
- Door ajar warning indicator lamp (SJB communicates information to the instrument cluster)
- Remote keyless entry (RKE) (optional)
- Power lock system (optional)