Pinpoint Test I : P0A5A:00, P0A5B:00, P0A5C:00: Notes
Diagnostic Overview
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for more information.
Refer to CHARGING SYSTEM for schematic and connector information.
Normal Operation and Fault Conditions
The generator current sensor is a hall effect sensor attached to the generator B+ cable. It is supplied a 5 volt reference and ground from the PCM. The PCM reads the generator current sensor feedback voltage to determine how much current is flowing through the generator B+ cable.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P0A5A | Generator Current Sensor Circuit Range/Performance | This DTC sets when the PCM does not detect current through the generator current sensor and there are no generator current sensor circuit DTCs set. |
| P0A5B | Generator Current Sensor Circuit Low | This DTC sets when the PCM senses lower than expected voltage on the generator current sensor feedback circuit, indicating an open or a short directly to ground. |
| P0A5C | Generator Current Sensor Circuit High | This DTC sets when the PCM senses higher than expected voltage on the generator current sensor feedback circuit, indicating a short directly to voltage. |
Possible Sources
- Generator current sensor
- PCM
- Wiring, terminals or connectors
Visual Inspection and Diagnostic Pre-checks
- Inspect the generator current sensor.
- Inspect the wiring, terminals or connectors.
- Inspect for loose or corroded connections.