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Inspection and Verification

WARNING: This page is about a different car, the 2012 Ford Mustang. 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
    • Battery Junction Box (BJB) fuse 24 (10A)
    • Wiring, terminals or connectors
    • Clutch pedal cruise control deactivator switch (manual transmission)
    • Cruise control switch
    • Cruise control deactivator switch (integral to the stoplamp switch)
    • Stoplamp switch
    • 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 cruise control by test driving the vehicle. If the speedometer does not operate correctly, refer to INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES .
  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 SYSTEM .
    6. NOTE: Make sure to use the latest scan tool software release.
  6. If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
    7. NOTE: The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
  7. 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.
  8. 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 to diagnose no response from the PCM.
  9. 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 the continuous memory DTCs.
  10. Clear the continuous DTCs and carry out the self-test diagnostics for the PCM.
  11. 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 .
  12. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
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