Pinpoint Test C : No Power In On - Conventional Ignition Switch: Notes
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Wiring Diagram Power Distribution for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: DESCRIPTION AND OPERATION .
BCM DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B1142:29 | Ignition Status 1: Signal Invalid | Sets when the BCM does not receive a valid ignition signal during a BCM self-test. |
| B1310:12 | Run/Start Control: Circuit Short to Battery | Sets when the BCM detects a short to voltage from the BJB run/start relay control circuit. When set, the control side of the run/start relay is disabled via the Field Effect Transistor (FET). Once the condition that caused the DTC to set is repaired, the BCM must pass a self-test in order for the DTC to clear and the system to resume normal operation. |
| B1310:14 | Run/Start Control: Circuit Short to Ground or Open | The BCM continuously monitors the BJB RUN/START relay control circuit. This DTC is set if the BCM detects an open or a short to ground on the BJB RUN/START relay control circuit. When this DTC sets, the BCM disables the control side of the RUN/START relay FET. Once the condition that caused the DTC to set is repaired, the BCM must pass a self-test in order for the DTC to clear and the system to resume normal operation. |
Possible Causes
- Network concern
- Wiring, terminals or connectors
- Ignition switch
- BCM
Visual Inspection and Diagnostic Pre-checks
- Inspect the BCM fuse 18 (5A)