B4000 V6-4.0L SOHC (2005)
Body Control Systems: Description and Operation
Smart Junction Box (SJB)
SMART JUNCTION BOX (SJB) DIAGNOSIS
Principles of Operation
NOTE: Upon installation of a new smart junction box (SJB), the module must be reconfigured.
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).