Pinpoint Test H : DTC P0A5A, P0A5B, P0A5C: Notes
Diagnostic Overview
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for more information.
Refer to Power Distribution/BCM , 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.
Visual Inspection and Diagnostic Pre-checks
Before diagnosing or repairing the charging system inspect the following items:
- Generator current sensor
- Wiring, terminals or connectors
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P0A5A | Generator Current Sensor Circuit Range/Performance | 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 | 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 | The PCM senses higher than expected voltage on the generator current sensor feedback circuit, indicating a short directly to voltage. |
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Battery current sensor
- PCM