PINPOINT TEST A : No Power in All Ignition Switch Positions - Vehicles with a Conventional Ignition Switch: Notes
Diagnostic Overview
No Power in All Ignition Switch Positions - Vehicles with a Conventional Ignition Switch
Refer to Power Distribution/BCM for schematic and connector information.
Normal Operation and Fault Conditions
The ignition switch receives fused battery voltage from BCM fuse 28 (15A). In the ACC or RUN position, this voltage is sent to the BCM. In the START position, this voltage is sent to both the BCM and the PCM.
When the ignition switch is cycled to the OFF/LOCK position from any other position the BCM begins a monitoring cycle. The monitoring cycle checks that the voltage supplied to the BCM from the ignition switch through the RUN/ACC, RUN/START and START circuits is delivered correctly for each ignition switch position.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U300A:01 | Ignition Switch: General Electric Failure | The BCM continuously monitors the ignition switch position. This DTC sets if the voltage inputs to the BCM do not match the pre defined configurations for each ignition switch position. |
Visual Inspection and Diagnostic Pre-checks
Make sure the battery and battery cables are OK.
Make sure high current BJB fuse B (100A) is OK.
Make sure BCM fuse 28 (15A) is OK.