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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1521 (Handles, Locks, Latches & Entry Systems) >> Diagnostic Tests >> Locks, Latches & Entry Systems >> Inspection & Verification

Inspection & Verification

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: If equipped with fire suppression system, refer to FIRE SUPPRESSION SYSTEM article for Important Safety Warnings. Failure to follow this instruction may result in serious personal injury.
NOTE: Before starting electrical diagnosis, check for mechanical binds by manually operating the door locks. Operate the lock system several times from each switch while observing the operation of all the door locks. Be sure the battery is fully charged.
  1. Verify the customer concern.
  2. Visually inspect the following for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Binding latches
    • Battery junction box (BJB) fuse(s):
      • 8 (20A)
      • 601 (20A) (circuit breaker)
      • 602 (20A) (circuit breaker)
    • Central junction box (CJB) fuse 2 (7.5A)
    • Wiring, terminals or connectors
    • Door lock actuators
    • Door lock control switches
    • Keyless entry keypad
    • Luggage compartment lid release switch
    • Luggage compartment lid release solenoid (part of the luggage compartment lid latch)
    • Antenna
    • Lighting control module (LCM)
    • Driver door module (DDM)
  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 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.
  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. Clear the continuous DTCs and carry out the self-test diagnostics for the DDM.
  9. If the DTCs retrieved are related to the concern, go to DTC Charts  For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
  10. If no DTCs related to the concern are retrieved, go to Symptom Chart .
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