Master Cylinder
DESCRIPTIONThree different master cylinders are used depending on whether or not the ABS system is equipped with or without traction control and with or without All-Wheel-Drive.
A vehicle equipped with ABS without traction control uses the same type of master cylinder as a vehicle without antilock brakes.
A vehicle equipped with ABS with traction control uses a unique center port master cylinder.
A vehicle equipped with All-Wheel-Drive (AWD) (which have four-wheel disc brakes) and ABS (without traction control) also uses a unique master cylinder. The master cylinder used on this vehicle has a piston bore diameter which is larger than the master cylinder used on the other brake applications.
Master cylinders on vehicles with traction control use ISO fittings at the outlet ports, while vehicles without traction control use standard double inverted flares.
Service is the same on all master cylinders. Refer to the Base Brake information for further information.
OPERATION
When the brake pedal is depressed, the master cylinder primary and secondary pistons apply brake pressure through the master cylinder's primary and secondary outlet ports and the chassis brake tubes leading directly to the Integrated Control Unit (ICU).