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Inspection and Verification

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. 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 mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Throttle body
    • Central junction box (CJB) fuse 11 (15A) (stoplamp switch)
    • Wiring, terminals or connectors
    • Stoplamp switch
    • Speed control deactivator switch
    • PCM
    • Speed control switches
  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. Verify the speedometer operates correctly without speed control by test driving the vehicle. If the speedometer does not operate correctly, refer to INSTRUMENT CLUSTER (IC) AND WARNING CHIMES article.
  5. Verify the stoplamp operate correctly with the ignition switch in the OFF position. If the stoplamp do not operate correctly, refer to EXTERIOR LIGHTING article.
  6. Verify the parking brake warning indicator operates correctly. If the parking brake warning indicator does not operate correctly, refer to INSTRUMENT CLUSTER (IC) AND WARNING CHIMES article.
    7. NOTE: Make sure to use the latest scan tool software release.
  7. If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
    8. NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
  8. 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.
  9. 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 article to diagnose no response from the PCM.
  10. 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.
  11. Clear the continuous DTCs and carry out the self-test diagnostics for the PCM.
  12. If the DTCs retrieved are related to the concern, go to DTC Charts. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
  13. If no DTCs related to the concern are retrieved, go to Symptom Chart .
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