LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2004 >> Explorer 4.6 W, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1848 (Engine System - General Information) >> Diagnostic Tests >> Engine >> 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 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern by operating the engine to duplicate the condition.
  2. Visually inspect for obvious signs of mechanical damage. Refer to the following chart.
    VISUAL INSPECTION CHART

    Mechanical
    • Engine coolant leaks
    • Engine oil leaks
    • Fuel leaks
    • Damaged or severely worn parts
    • Loose mounting bolts, studs and nuts
  3. If the inspection reveals obvious concerns that can be readily identified, repair as necessary.
    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 powertrain control module (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 continuous memory DTCs.
  8. Clear the continuous DTCs and carry out the self-test diagnostics for the Battery Control Module (BCM) and Powertrain Control Module (PCM).
  9. If the DTCs retrieved are related to the concern, go to the Battery Control Module (BCM) Diagnostic Trouble Code (DTC) Index, refer to HIGH VOLTAGE TRACTION BATTERY article. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
  10. If no DTCs related to the concern are retrieved, go to Symptom Chart .
scientia non olet · About LEMON Manuals