Inspection and Verification
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Visual Inspection Chart
| Mechanical | Electrical |
|---|---|
| Halfshafts IWE Shift motor Driveshaft and U-joints Vacuum leaks Fluid leaks Matching tire sizes Transfer case |
BJB fuses: 20 (20A) 27 (20A) 29 (10A) BCM mini fuse 37 (10A) Wiring harness MSS Transfer case clutch Connector(s) IWE vacuum solenoid Circuitry |
- 3.
If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- 4.NOTE: Make sure to use the latest scan tool software release.
If the cause is not visually evident, connect the scan tool to the DLC.
- 5.NOTE: The VCM LED prove-out confirms power and ground from the DLC are provided to the VCM.
If the scan tool does not communicate with the VCM :
- check the VCM connection to the vehicle.
- check the scan tool connection to the VCM.
- refer to Module Communications Network , No Power To The Scan Tool, to diagnose no power to the scan tool.
- 6.NOTE: Before carrying out the self-test, make sure:
- ignition is in RUN.
- 4A mode is selected (or the last mode selected before starting the self-test).
If the scan tool does not communicate with the vehicle:
- verify the ignition is in the ON position.
- refer to Module Communications Network to diagnose no response from the PCM.
- 7.
Carry out the network test.- If the scan tool responds with no communication for one or more modules, refer to Module Communications Network .
- If the network test passes, retrieve and record CMDTCs.
- 9.
If the DTCs retrieved are related to the concern, go to the TCCM DTC Chart. For all other DTCs, refer to Multifunction Electronic Modules .
- 10.
If no DTCs related to the concern are retrieved, GO to Symptom Chart - 4WD or GO to Symptom Chart - NVH .