Pinpoint Test A: No Power In On - Push Button Ignition Switch: Notes
WARNING: This page is about a different car, the 2022 Lincoln Nautilus. 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 fault from one of the ignition switch input circuits. |
| B108A:24 | Start Button: Signal Stuck High | Sets continuous when the BCM detects a fault from one of the ignition switch input circuits. |
| 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. |
| U300A:01 | Ignition Switch: General Electrical Failure | Sets when the BCM detects an invalid combination from the ignition switch input circuits. |
Possible Causes
- Battery voltage concern
- Fuse
- Wiring, terminals or connectors
- Relay
- BJB
- PATS concern
- GSM
- BCM
Visual Inspection and Diagnostic Pre-checks
- Inspect the battery and battery cables.
- Inspect the BCM fuse 7 (10A).