Symptom Chart: Four-Wheel Drive Systems
WARNING: This page is about a different car, the 2020 Ford F-150. 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 .
| Symptom | Possible Sources | Action |
|---|---|---|
| No communication with the TCCM | Scan tool DLC TCCM Wiring, terminals or connectors |
REFER to: Communications Network . |
| The front axle does not engage/disengage correctly | Wiring, terminals or connectors Fuses MSS IWE IWE solenoid Transfer case Vacuum leaks Front axle assembly TCCM |
GO to Pinpoint Test C |
| Unable to achieve flat tow (neutral tow) mode | Wiring, terminals or connectors HS-CAN IPC TCCM Door ajar switch Ignition switch |
REFER to: Neutral Flat Tow Activation and Deactivation . |
| Unable to duplicate customer concern | 4WD system and/or related components | GO to Pinpoint Test D |
| 4x4 TEMPORARILY DISABLED displayed in message center | Powertrain Torque Protection mode active | If the system is in 4A and TCCM detects excessive stress or high energy going through the clutch (clutch is slipping excessively while the system is commanding max clutch torque), clutch output will be turned. When the system had the ability to cool off, 4x4 operation will be automatically restored. |