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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1148 (Brake System - General Information) >> Diagnostic Tests >> Brake System - Hybrid >> Inspection and Verification

Inspection and Verification

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Wear high-voltage insulated safety gloves and a face shield when working with high-voltage batteries or cables. The high-voltage insulated safety gloves should be of the appropriate safety and protection rating. Inspect the gloves before use and always wear them with the leather outer glove. Any hole in the rubber insulating glove is a potential entry point for high-voltage. Failure to follow these instructions may result in serious personal injury or death.
NOTE: This article contains information that is specific to the Hybrid brake system.
NOTE: The ABS module is part of the HCU. Do not separate the ABS module from the HCU for any reason.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Brake master cylinder
    • Brake master cylinder reservoir
    • Brake booster
    • Brake booster check valve
    • Brake booster vacuum hose
    • Brake hoses and tubes
    • Brake caliper
    • Brake caliper piston seals
    • Brake caliper guide pins
    • Brake disc
    • Brake pads
    • Brake pedal linkage
    • HCU
    • Tires
    • Wheel bearings
    • ABS module
    • Parking brake switch
    • Brake fluid level switch
    • Wiring, terminals and connectors
  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 continuous memory DTCs.
  8. Clear the continuous DTCs and carry out the self-test diagnostics for the ABS module.
    9. NOTE: Some DTCs can be caused by hydraulic leaks in the circuit. A thorough visual inspection must be carried out on the entire brake system before attempting to service any DTCs. Repair any leaks or base brake concerns before continuing to the ABS Module DTC Chart.
  9. If the DTCs retrieved are related to the concern, go to ABS Module DTC Chart in VEHICLE DYNAMIC SYSTEMS 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 - Brake System  or Go to Symptom Chart - Noise, Vibration and Harshness (NVH) .

    11. For a complete list of ABS module DTCs, REFER VEHICLE DYNAMIC SYSTEMS article.

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