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BRAKES
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7. BRAKE HYDRAULIC LINES
SCHEMATIC CIRCUIT DIAGRAM OF ABS BRAKE LINE
General:
Vehicle braking is provided by Disc Brakes on the front wheels and Drum Brakes on the rear wheels.
Under normal brake operation, brake pedal movement is assisted by the Booster assembly and transmitted
to the Tandem Master Cylinder (TMC) assembly. The TMC assembly converts brake pedal movement to
hydraulic pressure. Vacuum for the brake servo assembly is obtained from the engine inlet manifold (for
petrol engines) or a vacuum pump (for diesel models), through a vacuum line and non-return valve.
Anti lock braking system consists of a Hydraulic modulator with integrated Electronic control unit, four wheel
speed sensors (one located at each wheel) and 2 warning lamps in the instrument cluster (1(yellow for ABS
and 1(Red) for EBD).
The brake pipes are connected to the brakes through the ABS ECU / HCU. They make two independent
circuits diagonally split. The primary circuit connects the Front Right and the Rear Left brake while the
secondary connects Front Left and Rear Right brake through ABS unit. Internal to the Hydraulic modulator
each brake has a pair of solenoid valves, one inlet and one outlet; these are activated by the ECU to control
the brake force on individual wheels whenever required.