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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 K: The Pedal Goes Down Slowly

Pinpoint Test K: The Pedal Goes Down Slowly

  1. K1: ROAD TEST VEHICLE - CHECK BRAKE PEDAL OPERATION 
    1. Check if the condition occurs during actual stopping application by applying the brake pedal while the vehicle is moving

      Does the condition occur when the vehicle is moving?

      Yes 

      GO to  K2.

      No 

      GO to  K3.

  2. K2: 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

      Are there any external brake system leaks?

      Yes 

      Rectify as necessary. Add fluid and bleed the brake system. Re-test the system for normal operation

      No 

      GO to  K3.

  3. K3: COMPLETE A BRAKE MASTER CYLINDER BYPASS TEST 
    1. Test for brake master cylinder bypass condition. Refer to Brake master cylinder component test in this article

      Has a concern been identified?

      Yes 

      Install a new brake master cylinder, add fluid and bleed the brake system. Re-test the system for normal operation

      No 

      No action required, system is OK