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Inspection and Verification

WARNING: This page is about a different car, the 2011 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of electrical damage.
    VISUAL INSPECTION CHART

    Electrical
    • Smart Junction Box (SJB) fuse(s):
      • 9 (15A) (interior courtesy lamps)
      • 10 (15A) (puddle lamps)
      • 16 (15A) (ambient lighting)
      • 25 (10A) (demand lamps)
    • Wiring, terminals or connectors
    • Courtesy/map lamps
    • Puddle lamps
    • Vanity mirror lamps
    • Instrument panel dimmer switch
    • Footwell lamps
    • Scuff plate lamps
    • Glove compartment lamp
    • Ambient lighting switch
    • Ambient lighting dimmer switch
    • SJB
  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.
  4. If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
    5. NOTE: The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
  5. 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 article, No Power To The Scan Tool, to diagnose no communication with the scan tool.
  6. If the scan tool does not communicate with the vehicle:
    • Verify the ignition is ON.
      • The air bag warning indicator prove-out confirms ignition ON (other indicators may not prove ignition is ON). If ignition does not turn ON, refer to STEERING COLUMN SWITCHES article to diagnose No Power in Run.
    • Verify the scan tool operation with a known good vehicle.
    • Refer to MODULE COMMUNICATIONS NETWORK article 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 article.
    • If the network test passes, retrieve and record the continuous memory DTCs.
    8. NOTE: The Remote Function Actuator (RFA) module self-test must be run with the ignition in OFF mode.
  8. Clear the continuous DTCs and carry out the self-test diagnostics for the SJB, the RFA module, and the Liftgate/Trunk Module (LTM).
  9. If the DTCs retrieved are related to the concern, go to DTC CHARTS . For all other DTCs, refer to the Diagnostic Trouble Code (DTC) Chart in MULTIFUNCTION ELECTRONIC MODULES article.
  10. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
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