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Pinpoint Test G - Incorrect Signal For Commanded Braking Action

  1. Check Sensor Indicators & Wheel Speed Sensors

    Raise vehicle on hoist. Check front and rear toothed sensor indicators for missing teeth or loose/missing ring. Replace components as necessary. If toothed sensor indicators are okay, go to next step.

  2. Check Wheel Spin Effort

    With vehicle on hoist and transaxle in neutral, spin each wheel by hand. If each wheel spins freely, go to next step. If any wheel does not spin freely, check disc/drum brake operation and repair as necessary.

  3. Check Brakelines/Hoses

    Inspect brakelines from each wheel to Hydraulic Control Unit (HCU). Check for loose fittings, pinched brakelines or kinked hoses. Replace components as necessary. If brakelines/hoses are okay, go to next step.

  4. Check Wheel Speed Sensor Output

    Partially raise vehicle on hoist. Using New Generation Star (NGS) (007-00500) tester, select PID/DATA MONITOR and RECORD. Select ALL FOUR WHEELS and press TRIGGER. Rotate each wheel by hand and observe NGS display screen. If display indicates wheel speed for each wheel, replace Hydraulic Control Unit (HCU). If display does not indicate wheel speed for each wheel, go to PINPOINT TEST F  and check wheel speed sensor circuits.
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