Normal Operation
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The Smart Junction Box (SJB) sends a voltage signal to the hazard flasher lamp switch. When the hazard flasher lamp switch is pressed, the voltage signal is routed to ground. When the SJB detects a request for the hazard lamps, the SJB provides voltage to the appropriate turn lamps.
The hazard flasher lamp switch is a momentary contact switch.
The hazard flasher lamp switch for MKZ is integrated into the Front Controls Interface Module (FCIM).
- DTC B2071 (Hazard Switch Signal Short to Ground) - an on-demand DTC that sets when the SJB detects a short to ground from the hazard flasher lamp switch input circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Hazard flasher lamp switch (Fusion/Milan)
- FCIM (MKZ)
- SJB