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Inspection and Verification

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern.
  2. Visually inspect the following for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Throttle body
    • Auxiliary relay box fuse F01 (5A)
    • Central junction box (CJB) fuse(s):
      • 2 (20A)
      • 14 (10A)
    • Circuitry
    • Speed control switch
    • Stoplamp switch
    • Speed control deactivator switch
    • Clutch pedal position (CPP) switch
    • Powertrain control module (PCM)
  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 article.
  5. Verify the stoplamps operate correctly with the ignition switch in the ON position. If the stoplamps do not operate correctly, refer to EXTERIOR LIGHTING article.
  6. Verify the parking brake warning indicator is operating correctly. If the parking brake warning indicator does not operate correctly, refer to INSTRUMENT CLUSTER 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.
  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.
  10. Carry out the network test:
    • 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 the Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
  13. If no DTCs related to the concern are retrieved, go to Symptom Chart .
    POWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX

    DTCs Description Action
    P0500 Vehicle Speed Sensor A REFER to the Content Not Found article.
    P0579 Cruise Control Multi-Function Input A Circuit Range/Performance Go to Pinpoint Test C .
    P0581 Cruise Control Multi-Function Circuit High Go to Pinpoint Test C .
    P0720 Output Shaft Speed Sensor Circuit If equipped with a manual transmission, REFER to the Content Not Found article.
    If equipped with an automatic transmission, REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - 4R70E/4R75E article.
    P0721 Output Shaft Speed Sensor Circuit Range/Performance If equipped with a manual transmission, REFER to the Content Not Found article.
    If equipped with an automatic transmission, REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - 4R70E/4R75E article.
    P0722 Output Shaft Speed Sensor Circuit No Signal If equipped with a manual transmission, REFER to the Content Not Found article.
    If equipped with an automatic transmission, REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - 4R70E/4R75E article.
    P1703 Brake Switch Out of Self Test Range Go to Pinpoint Test B .
    All other DTCs - REFER to MULTIFUNCTION ELECTRONIC MODULES article.
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