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 is placed in RUN mode, the Body Control Module (BCM) module provides a ground for the coil (control) side of the run/start relay located in the Battery Junction Box (BJB). The BCM monitors the run/start relay control circuit and sets the applicable DTC if the circuit is open, shorted to ground or shorted to voltage.
- DTC B1310:12 (Run/Start Control: Circuit Short to Battery) - this DTC sets if the BCM detects a short to battery in the run/start relay control circuit during a BCM self-test or during normal operation.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Run/start relay
- BCM