DTC | Description | Fault Trigger Conditions |
|---|---|---|
P0A5B Generator Current Sensor Circuit Low | Sets in the PCM 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 | Sets in the PCM 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 Generator clutch (if equipped) PCM Wiring, terminals or connectors
Visual Inspection and Diagnostic Pre-checks
Inspect the generator current sensor. Inspect the generator current sensor connector.
PINPOINT TEST E : GENERATOR CURRENT SENSOR FAULTS
NOTE: Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.
NOTE: Do not have a battery charger attached during vehicle testing.
E1 RETRIEVE DIAGNOSTIC TROUBLE CODES (DTCS)
Ignition ON. Using a diagnostic scan tool, perform the PCM self-test
Is DTC P0562 present?
Yes | GO to Pinpoint Test B |
|---|---|
No | For DTC P0A5A, GO to E2 For DTC P0A5B, GO to E3 For DTC P0A5C, GO to E6 |
E2 CHECK THE GENERATOR CURRENT SENSOR
Ignition OFF. Inspect the generator current sensor for the following:
physical damage corrosion disconnected electrical connector generator B+ cable routed through the generator current sensor debris between the generator current sensor and the generator B+ cable
Are any of these conditions found during inspection?
Yes | REPAIR as necessary or INSTALL a new generator current sensor. REFER to: Generator Current Sensor (414-01 Battery, Mounting and Cables, Removal and Installation). |
|---|---|
No | GO to E10 |
E3 CHECK THE GENERATOR CURRENT SENSOR REFERENCE VOLTAGE CIRCUIT FOR AN OPEN
Ignition OFF. Disconnect Generator current sensor C1645. Ignition ON. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C1645-1 | Ground |
Is the voltage between 4.8 and 5.2 volts?
Yes | GO to E4 |
|---|---|
No | If the voltage is less than 4.8 volts, REPAIR the circuit for an open or high resistance. If the voltage is greater than 5.2 volts, REPAIR the circuit for a short to voltage. |
E4 CHECK THE GENERATOR CURRENT SENSOR GROUND CIRCUIT FOR AN OPEN
Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.