Smart Junction Box (SJB)
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
The SJB constantly monitors its subsystems for concerns. If a concern is found in one of the subsystems, the SJB records the concern in the form of a diagnostic trouble code (DTC).
The ignition switch position is very important to the SJB functionality. Erratic or unexpected SJB functions can often be traced to problems with these ignition SJB inputs.
The SJB controls a variety of systems:
- battery saver relay
- heated rear window
- interior lighting
- exterior lighting
- remote keyless entry (RKE)
- delayed accessory
- power door locks (including SMART, autolocking and luggage compartment lid release)
- perimeter anti-theft
- horn