LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2004 >> Excursion 6.0 P, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1924 (MULTIFUNCTION Electronic Modules) >> Diagnostic Tests >> Vehicle Security Module (VSM) >> Inspection and Verification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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 obvious signs of electrical damage.
    VISUAL INSPECTION CHART

    Electrical
    • Central junction box (CJB) fuse(s):
      • 2 (10A)
      • 10 (20A)
      • 15 (5A)
      • 23 (20A)
    • Wiring, terminals or connectors
    • Vehicle security module (VSM)
  3. If an obvious cause of 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 connections 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 VSM.
  9. If the DTCs retrieved are related to the concern, go to DTC Charts. For all other DTCs, go to Diagnostic Trouble Code (DTC) Chart .
  10. If no DTCs related to the concern are retrieved, go to Symptom Chart .
scientia non olet · About LEMON Manuals