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Home >> Ford >> 2007 >> Cutaway 6.0 P >> Repair and Diagnosis >> Brakes >> Traction Control >> Vehicle Dynamic Systems >> Diagnostic Tests >> Anti-Lock Control >> Inspection & Verification >> Communication Check

Communication Check

  1. Verify the customer concern by applying the brakes under different conditions.
  2. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Wheel speed sensor
    • Wheel speed sensor ring
    • Wheel speed sensor gap
    • Parking brake cable
    • Tire pressure
    • Tire size or mismatched tires
    • Base brake system
    • Central junction box (CJB) fuse 1 (5A)
    • Battery junction box (BJB) fuse 11 (60A)
    • Connectors or connections
    • Harness routing
    • Circuitry
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
    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).
    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 diagnostic trouble codes (DTCs).
  8. Clear the continuous DTCs and carry out the self-test diagnostics for the ABS module.
  9. If the DTCs retrieved are related to the concern, go to the Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Chart. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES .
  10. If no DTCs related to the concern are retrieved, go to Symptom Chart .
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