Pinpoint Test F : No Power In On - Push Button Ignition Switch: Notes
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Power Distribution for schematic and connector information.
Refer to Starting System for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Steering Wheel and Column Electrical Components - System Operation and Component Description .
BCM DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B108A:01 | Start Button: General Electrical Failure | Sets continuous when the BCM detects a mismatch between the switch input circuits, one indicates closed and one indicates open. |
| B108A:24 | Start Button: Signal Stuck High | Sets continuous when the BCM detects a fault on one of the ignition switch input circuits for 10 seconds or longer. |
| B108A:9E | Start Button: Stuck On | Sets continuous when the BCM detects only one switch input circuit indicating open when the start button is released. |
| B1142:29 | Ignition Status 1: Signal Invalid | Sets during the on-demand self-test when the BCM detects a fault from one of the ignition switch input circuits. |
| 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
- Battery voltage concern
- Fuse
- Wiring, terminals or connectors
- PATS concern
- Push button ignition switch
- BCM
Visual Inspection and Diagnostic Pre-checks
- Inspect the battery and battery cables.
- Inspect the BCM fuse 18 (5A)
No Power in ON - Push Button Ignition Switch
Refer to Starting System for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Steering Wheel and Column Electrical Components - System Operation and Component Description .
Possible Causes
- Wiring, terminals or connectors
- Push button ignition switch
- BCM