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Home >> Lexus >> 2021 >> RC F Base >> Repair and Diagnosis >> General Information >> Brakes >> Map - Brake Systems >> Brake Systems >> Master Cylinders
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Master Cylinders

Condition Code Procedure
Brake fluid leaking from rear of master cylinder bore B Require repair or replacement
Brake pedal drops intermittently A Require repair or replacement
NOTE: This condition may be normal on some vehicles equipped with anti-lock brakes.
Fluid level low   Further inspection required
NOTE: Refer to OEM procedures for adjusting low fluid level. Inspect for brake hydraulic leaks and friction material wear.
Internal valve failure A Require repair or replacement
Master cylinder leaking brake fluid internally A Require repair or replacement
Piston does not return A Require repair or replacement
Ports plugged A Require repair or replacement
Pushrod out of adjustment B Require Repair or Replacement
Rubber master cylinder cover gasket distorted and gummy A Require replacement of the gasket
NOTE: This condition may indicate contaminated brake fluid. See Brake Fluid.