Normal Operation
WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. 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