The Honda Anti-lock Brake System (ABS) contains brake fluid under extremely high pressure within the pump, accumulator, and modulator assembly, so it is crucial to relieve system pressure before disconnecting or loosening any lines, hoses, fittings, or components to avoid severe personal injury or property damage. Honda vehicles feature a tandem brake master cylinder with one reservoir tank and two feed holes for the primary and secondary circuits. Begin by disconnecting the negative battery cable and detaching the electrical connectors from the brake master cylinder. Remove the reservoir cap and siphon out the brake fluid, taking care to avoid contact with eyes and washing hands thoroughly afterward. Use a flare nut wrench to disconnect the fluid line and unfasten the mounting nuts to remove the brake master cylinder from the
Brake Booster. For installation, reverse the removal steps, fill the brake master cylinder with approved DOT 3 or DOT 4 brake fluid, and properly bleed it. If bench bleeding, secure the brake master cylinder in a vise, place a catch pan underneath, connect two short sections of
Brake Line to the outlet fittings, and ensure the open ends are below the fluid level. Fill the reservoir with fresh brake fluid and pump the piston until no air bubbles appear. After disconnecting the lines, refill the brake master cylinder and securely install the cap. If the brake master cylinder is still on the vehicle, open one brake line at a time, have an assistant press the brake pedal, and then release it slowly while checking the fluid level. Repeat this for all lines until the fluid is free of air bubbles, and always lighten the line before releasing the brake pedal. Once bled, flush the area with water to neutralize any brake fluid, and if the brake master cylinder is properly bled and filled upon installation, bleeding the entire hydraulic system may not be necessary.