Four Wheel Drive (4WD) Systems DTCS
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
Network DTCs (U-codes) are often a result of intermittent concerns such as damaged wiring or low battery voltage occurrences. Additionally, vehicle repair procedures, such as module reprogramming, often set network DTCs. Replacing a module to resolve a network DTC is unlikely to resolve the concern. To prevent repeat network DTC concerns, inspect all network wiring, especially connectors. Test the vehicle battery. REFER to: Battery .
| DTC | Description | Action |
|---|---|---|
| P164D | AWD ID Block Corrupted, Not Programmed | PROGRAM the PCM with the Active Torque Coupling (ATC) solenoid bar code information using Automatic Torque Coupling Configuration. REFER to: Four-Wheel Drive Systems - System Operation and Component Description . |
| P181F | Clutch Control System Performance | This is an internal AWD relay module fault. INSTALL a new AWD relay module. REFER to: All-Wheel Drive (AWD) Module . |
| P187B | Tire Size Out of Acceptable Range - AWD Disabled / Limited Function | GO to Pinpoint Test B |
| P188B | AWD Clutch Control Circuit | GO to Pinpoint Test C |
| P188C | AWD Relay Module Communication Circuit | CLEAR the DTCs. REPEAT the self-test. If the DTC returns, GO to Pinpoint Test D |
| P188D | AWD Relay Module Feedback Circuit | CLEAR the DTCs. REPEAT the self-test. If the DTC returns, GO to Pinpoint Test D |