Rear Wheel Skid Restraining Control Making a Right Turn

In the rear wheel skid restraining control, the brake of the front wheel of the outer circle of the turn is applied. Also, depending on whether the brake is ON or OFF and the condition of the vehicle, there are circumstances in which the brake might not be applied to the wheels even if those wheels are targeted for braking.

The diagram on the next page shows the hydraulic circuit in the pressure increase mode, as it controls the rear wheel skid condition while the vehicle makes a right turn.

In other operating mode, the pressure holding valve and the pressure reduction valve are turned ON/OFF according to the ABS operation pattern.

When the rear wheel skid restraining control is activated, each solenoid valve operates as shown in the table on the next page.

^ VSC Operation (Rear Wheel Skid Restraining) 4

From Master Cylinder From Master Cylinder

Component Drawings Engineering

VSC Not Activated

VSC Activated

Item

Port

Increase Mode

Holding Mode

Reduction Mode

(1) (2)

Master Cylinder Cut Solenoid Valve

(A)

OFF (Open)

ON*

(B)

OFF (Open)

Front Brake

(3)

Pressure Holding Solenoid Valve

(C)

OFF (Open)

ON (Close)

(6)

(F)

OFF (Open)

ON (Close)

(7)

Pressure Reduction Solenoid Valve

(G)

OFF (Close)

ON (Open)

(10)

(J)

OFF (Close)

Wheel Cylinder Pressure

Right

Left

Increase

Hold

Reduce

Rear Brake

(4)

Pressure Holding Solenoid Valve

(D)

OFF (Open)

ON (Close)

(5)

(E)

OFF (Open)

ON (Close)

(8)

Pressure Reduction Solenoid Valve

(H)

OFF (Close)

(9)

(D

OFF (Close)

Wheel Cylinder Pressure

Right

Left

Pump

OFF

ON

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