Operation Mode; Normal Braking Mode - Chevrolet Sail 2010 Learner’s Manual

（EBCM） , a system fuse, four wheel speed sensors （ one for each wheel） , interconnecting leads, anti-lock braking
system indicator lights, a decoupled dynamic rear proportioning （DDRP） indicator light （connected with the
parking brake lamps）, and rear drum brakes. The hydraulic unit and the electronic brake control module
connected with it are located between the left fluid storage tank and the bulkhead. The configuration of the basic
hydraulic unit consists of a hydraulic non-return valve, two solenoid valves of each wheel, a hydraulic pump, two
power accumulators and two dampers. The hydraulic unit controls the front brake calipers and the oil pressure of
the rear brake wheel cylinders through regulating the oil pressure to prevent wheel lockup.

5.3 Operation mode

5.3.1 Normal Braking Mode

The normal braking mode of the MGH-25 anti-lock braking system （ABS） adopted by this vehicle is a
diagonally shunted braking system. In this system, an oil circuit of the Master Cylinder supplies pressure to the
right front and left rear brakes. Another oil circuit supplies pressure to the left front and right rear brakes. All
valves of the hydraulic regulator are in normal state, i.e. positions with no pressure supplied as shown in the
hydraulic circuit diagram.
1. Master Cylinder
2. Orifice
3. Damper
12. Motor
13. Intake Valve
14. Right Front Brake Caliper
Chevrolet 2010 New Sail New Technical Training
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- Learner's Manual