Decoupled Dynamic Rear Proportioning （Ddrp - Chevrolet Sail 2010 Learner’s Manual

4. Displacement Pump
5. Power Accumulator
6. Intake Valve
7. Right Rear Brake Caliper
8. Outlet Valve
9. Outlet Valve
10. Left Front Brake Caliper
11. Intake Valve
5.4 Decoupled Dynamic Rear Proportioning （DDRP）
The DDRP（decoupled dynamic rear proportioning）system is a proportioning system, which is used for
maintaining vehicle stability during braking. Under normal braking conditions, the braking force of the rear
wheels is on the small side because the vehicle's center of gravity moves forward. DDRP maintains the brake
pressure required by the rear wheels through the rear intake and outlet valves of the anti-lock braking system
（ABS）to provide effective braking effect and vehicle stability. In the DDRP system, the power of the rear
maintaining solenoid valve is supplied by the ignition circuit.
If one of the following malfunctions occurs, the red brake warning light will be illuminated.
The two wheel speed sensors on the same axle are out of service.
The rear intake solenoid valve is out of service.
The accumulator 2 and the motor input are short-circuited against the ground.
The accumulator 1 and the electronic brake control module are open-circuited or short-circuited against
the ground.
The motor ground circuit is open-circuited or short-circuited against the accumulator.
The ground circuit of the electronic brake control module is open-circuited or short-circuited against the
accumulator.
The ignition circuit is open-circuited or short-circuited against the ground.
15. Outlet Valve
16. Outlet Valve
17. Left Rear Brake Caliper
18. Non-Return Valve
19. Intake Valve
20. Power Accumulator
21. Displacement Pump
22. Damper
23. Orifice
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- Learner's Manual