Normal Operation
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
When placed in ACC, RUN or START, the ignition switch sends voltage out to the Body Control Module (BCM). Microprocessors in the BCM continuously monitor the ignition switch state.
- DTC B1142:29 (Ignition Status 1: Signal Invalid) - sets if the BCM does not receive a valid ignition state signal during the BCM self-test.
This pinpoint test is intended to diagnose the following
- Wiring, terminals or connectors
- Ignition switch
- BCM