Symptom Chart
WARNING: This page is about a different car, the 2016 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.
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.
Preliminary Inspection
- Before diagnosing or repairing the charging system inspect the following items:
- Fusible links
- Abnormal ignition-off current drain(s)
- Battery
- Wiring, terminals or connectors
- High current BJB for loose or corroded connections
- Radial arm adapter
Symptom Chart - Charging System
| Condition | Possible Sources | Action |
|---|---|---|
| System voltage high | Fuse Wiring, terminals or connectors Engine, generator and battery ground Battery Generator PCM |
GO to Pinpoint Test A . |
| System voltage low or battery is discharged | Fuse Fusible link Wiring, terminals or connectors Engine, generator and battery grounds Abnormal ignition-off current drain(s) Radial arm adapter Battery Generator PCM High current BJB |
GO to Pinpoint Test B . |
| The generator is noisy | FEAD belt Loose bolts/brackets Generator/pulleys |
GO to Pinpoint Test F . |
| Radio interference | Generator Wiring, terminals or connectors In-vehicle entertainment system |
GO to Pinpoint Test G . |
| Charging system warning indicator is never/always on | Wiring, terminals or connectors IPC Generator PCM |
RETRIEVE CMDTCs from all modules. If any charging system DTCs are found, REFER to DTC Charts . If no charging system DTCs are found, REFER to Instrumentation, Message Center, and Warning Chimes . |