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Home >> Jaguar >> 2019 >> XJR575 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System - General Information -- XJ/X351 >> Brake System - General Information (G1269564) >> Diagnosis And Testing >> Brake System (G2871762) >> Pinpoint Tests >> Pinpoint Test J: The Pedal Goes Down Fast

Pinpoint Test J: The Pedal Goes Down Fast

  1. J1: ROAD TEST VEHICLE 
    1. Road test the vehicle and apply the brake pedal

      Is the brake pedal effort and brake pedal travel normal?

      Yes 

      No action required, vehicle is OK

      No 

      GO to  J2.

  2. J2: CHECK BRAKE PEDAL TRAVEL-PRESSURIZE SYSTEM 
    1. Pump the brake pedal rapidly (five times)

      Does the brake pedal travel build up and then hold?

      Yes 

      Bleed the brake system. Re-test the system for normal operation

      No 

      GO to  J3.

  3. J3: CHECK FOR BRAKE SYSTEM LEAKS 
    1. Check for external brake system leaks. For additional information, refer to brake master cylinder component test in this article

      Is there a leak present?

      Yes 

      Repair as necessary, add fluid and bleed brake system. Re-test the system for normal operation

      No 

      No action required, system is OK

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