Normal Operation
WARNING: This page is about a different car, the 2014 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition switch is turned to the START position, a voltage signal is sent to the Body Control Module (BCM) and the PCM. The BCM sends out a voltage signal to various modules to indicate a start event and the PCM checks various inputs and bus messages in an effort to start the vehicle.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Ignition switch