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Home >> Ford >> 2006 >> Freestar Base >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnosis And Testing >> Anti-Lock Control >> Inspection and Verification
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Inspection and Verification

  1. Verify the customer concern.
  2. Verify the base brake system operates correctly by pressing and releasing the brake pedal with the ignition switch in the OFF position. If the stoplamps do not operate correctly, refer to EXTERIOR LIGHTING . If the stoplamps operate correctly, proceed to the next step.
  3. Verify the base brake system operates correctly. If any concerns are present address them before continuing with any ABS concerns. Refer to BRAKE SYSTEM-GENERAL INFORMATION . If the stoplamps operate correctly, proceed to the next step.
  4. Verify that the PRNDL operates correctly. If the PRNDL does not operate correctly, refer to INSTRUMENT CLUSTER . If the PRNDL operates correctly, proceed to the next step.
  5. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Wheel and tire sizes
    • Brake fluid level
    • HCU
    • Base brake system
    • Brake booster vacuum hose
    • Steering components, suspension components and tire size
    • Steering wheel rotation sensor
    • Bussed electrical center (BEC) fuse(s):
      • 8 (40A)
      • 12 (40A)
    • Smart junction box (SJB) fuse 18 (10A)
    • Circuitry
    • Wheel speed sensor
    • Traction control switch
    • Brake pedal position (BPP) switch
    • Steering wheel rotation sensor
    • Brake booster solenoid
    • Brake booster release switch
    • Brake pressure transducer
    • Sensor cluster
    • Stoplamp isolation relay
    • Brake fluid level switch
    • ABS module
  6. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  7. If the cause is not visually evident, connect the scan tool to the data link connector (DLC) and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle:
    • check the connections to the vehicle.
    • check the ignition switch position.
  8. If the scan tool still does not communicate with the vehicle, refer to the scan tool operating manual.
  9. Carry out the scan tool data link test. If the scan tool responds with:
    • CAN circuit fault; all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
    • No response/not equipped for the ABS module, GO to PINPOINT TEST A .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs). Erase the continuous DTCs. Test drive the vehicle. Be sure to include at least 1 stop that includes ABS activation. Carry out ABS module self-test diagnostics.
  10. If the DTCs retrieved are related to the concern, go to the ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
  11. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
    NOTE: The need to recalibrate the module is indicated by the active/fail lamp flashing. There are other service actions that can require recalibration when there is no flashing lamp.
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