Inspection and Verification
WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- The battery voltage must be at normal operating levels for the power liftgate to open and close correctly. Make sure the battery and charging systems are operating correctly before proceeding with the power liftgate diagnosis.
- Visually inspect for obvious signs of mechanical and electrical damage. Refer to the following table.VISUAL INSPECTION CHART
Mechanical Electrical - Power liftgate pinch strip switches
- Liftgate and liftgate hinges
- Liftgate assist cylinders
- Liftgate striker
- Exterior release switch
- Liftgate weatherstrip
- Liftgate alignment to body and striker
- Wedges
- Excessive weight on the liftgate (for example: bike rack or snow and ice)
- Body Control Module (BCM) fuse 9 (10A)
- Battery Junction Box (BJB) fuse 7 (30A)
- Wiring, terminals or connectors
- Power liftgate control switch - instrument panel
- Power liftgate rear control switch - quarter trim panel
- BCM
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
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NOTE: Make sure to use the latest scan tool software release.
If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
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NOTE: The Vehicle Communication Module (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.
- If the scan tool does not communicate with the vehicle:
- verify the ignition key is in the ON position.
- verify the scan tool operation with a known good vehicle.
- refer to MODULE COMMUNICATIONS NETWORK , The PCM Does Not Respond To The Scan Tool, to diagnose no response from the PCM.
- 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 Continuous Memory Diagnostic Trouble Codes (CMDTCs).
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NOTE: Carrying out the LTM initialization procedure will resolve concerns where the power liftgate has lost position or was not initialized correctly. For information, refer to POWER LIFTGATE INITIALIZATION .
Clear the CMDTCs and carry out the self-test diagnostics for the LTM or BCM .
- If the DTCs retrieved are related to the concern, go to the LIFTGATE/TRUNK MODULE (LTM) DTC CHART or the BODY CONTROL MODULE (BCM) DTC CHART . For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES .
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .