Is the generator the noise source?
Yes | INSTALL a new generator. REFER to: Generator - 5.0L 32V Ti-VCT (414-02 Generator and Regulator, Removal and Installation). |
|---|---|
No | REFER to: Engine (303-00) . to diagnose the source of the engine noise. |
Radio Interference
Refer to Wiring Diagrams Cell 12 for schematic and connector information.
Normal Operation and Fault Conditions
The generator radio suppression equipment reduces interference transmitted through the speakers by the vehicle electrical system.
NOTE: If the Original Equipment Manufacturer (OEM) Audio Control Module (ACM) has been replaced with an aftermarket unit, the vehicle may not pass this test. Return the vehicle to Original Equipment Manufacturer (OEM) condition before following this pinpoint test.
NOTE: If the engine is operated at greater than 2,000 Revolutions Per Minute (RPM) momentarily, the generator self-excites. Make sure when the generator is disconnected the engine rpm stays below 2,000 Revolutions Per Minute (RPM). If it rises above 2,000 Revolutions Per Minute (RPM), turn the ignition to the OFF position and start the test over again.
NOTE: Inspect for any aftermarket accessories that have been added to the vehicle. Check the wiring for these accessories and be sure they have not been attached to the generator circuits and are positioned away from the generator wiring.
Possible Sources
Generator In-vehicle entertainment system Wiring, terminals or connectors
Visual Inspection and Diagnostic Pre-checks
Inspect the generator. Inspect the in-vehicle entertainment system.
PINPOINT TEST D : RADIO INTERFERENCE
D1 VERIFY THE GENERATOR IS THE SOURCE OF THE AUDIO SYSTEM INTERFERENCE
Start the engine. Allow the engine to idle. Tune the audio system to a station where interference is present. Ignition OFF. Disconnect Generator C102B. Disconnect Generator C102C. Start the engine. Allow the engine to idle.
Is the interference present with the generator disconnected?
Yes | REFER to: Information and Entertainment System (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Diagnosis and Testing). (without touchscreen), or REFER to: Information and Entertainment System (415-00B) . (with touchscreen). |
|---|---|
No | INSTALL a new generator. REFER to: Generator - 5.0L 32V Ti-VCT (414-02 Generator and Regulator, Removal and Installation). |
Generator Current Sensor Faults
Refer to Wiring Diagrams Cell 13 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.
Diagnostic Trouble Code (DTC) Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
|---|---|---|
P0A5A Generator Current Sensor Circuit Range/Performance | Sets in the PCM when the PCM does not detect current through the generator current sensor and there are no generator current sensor circuit Diagnostic Trouble Codes (DTCs) set. |
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.