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Home >> Toyota >> 2021 >> 4Runner Limited, RWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Hydraulic) - Service Information >> BRAKE FLUID (for Hydraulic Brake Booster) >> On-Vehicle Inspection [08/2015 - ] >> Procedure

On-Vehicle Inspection [08/2015 - ]: Procedure

  1. CHECK FLUID LEVEL IN RESERVOIR 
    1. Turn the engine switch off and fully depress the brake pedal 40 times or more to release the pressure in the accumulator.
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      HINT: 

      When the pressure in the accumulator is released, the pedal stroke will lengthen.

    2. Adjust the fluid level so that it is at the MAX line.

      HINT: 

      When the engine switch is turned on (IG), brake fluid is sent to the accumulator and the fluid level decreases by approximately 10 mm (0.394 in.) from the MAX line.

      Brake fluid

      SAE J1703 or FMVSS NO. 116 DOT 3