Front Wheel Skid Restraining Control Turn to the Right

In the front wheel skid restraining control, the brakes of the front wheels and the rear wheel of the inner circle of the turn are 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 below shows the hydraulic circuit in the pressure increase mode, as it controls the front wheel skid condition while the vehicle makes a right turn.

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

The front wheel skid restraining control is activated, each solenoid operates as shown in the table on the next page.

^ Pressure Increase Mode (TMC Made Models) ^

Master Cylinder

^ Pressure Increase Mode (TMC Made Models) ^

Master Cylinder

Front Left Rear Right

Reservoirs

Pressure Increase Mode

^MSinD

Rear Left Front Right

Front Left Rear Right

Reservoirs

Pressure Increase Mode

^MSinD

Rear Left Front Right

259ESI12

VSC Activated

Item

VSC not

Mode

Activated

Increase Mode

Holding Mode

Reduction Mode

(1), (2)

Master Cylinder Cut Solenoid Valve

OFF/

ON*

A

A

Port: (A), (B)

Open

(3)

Pressure Holding Solenoid Valve

OFF/

A

ON/

A

Port: (C)

Open

Close

(6)

Pressure Holding Solenoid Valve

OFF/

A

ON/

A

Port: (F)

Open

Close

Front Brake

(7)

Pressure Reduction Solenoid Valve

OFF/

A

A

ON/

Port: (G)

Close

Open

(10)

Pressure Reduction Solenoid Valve

OFF/

A

A

ON/

Port: (J)

Close

Open

Wheel Cylinder Pressure

Right

Increase

Holding

Reduce

Left

Increase

Holding

Reduce

(4)

Pressure Holding Solenoid Valve

OFF/

A

ON/

A

Port: (D)

Open

Close

(5)

Pressure Holding Solenoid Valve

OFF/

ON/

A

A

Port: (E)

Open

Close

Rear Brake

(8)

Pressure Reduction Solenoid Valve

OFF/

A

A

ON/

Port: (H)

Close

Open

(9)

Pressure Reduction Solenoid Valve

OFF/

A

A

A

Port: (I)

Close

Wheel Cylinder Pressure

Right

Increase

Holding

Reduce

Left

*: The solenoid valve controls the hydraulic pressure between "open" and "close" according to the operating condition by adjusting continually.

^ Pressure Increase Mode (TMMK Made Models) ^

Master Cylinder

Master Cylinder

Increase Mode

VSC not Activated

VSC Activated

Item

Increase

Hold

Reduction

Mode

Mode

Mode

(1), (4)

Master Cylinder Cut Solenoid Valve

OFF/

ON/

A

A

Port: (A), (D)

Open

Close

(2), (3)

Reservoir Cut Solenoid Valve

OFF/

ON/

A

A

Port: (B), (C)

Close

Open

(5), (8)

Pressure Holding Valve

OFF/

A

ON/

A

Front Brake

Port: (E), (H)

Open

Close

(9), (12)

Pressure Reduction Valve

OFF/

A

A

ON/

Port: (I), (L)

Close

Open

Wheel Cylinder Pressure

Increase

Hold

Reduction

(6)

Pressure Holding Valve (Rear Right)

OFF/ Open

A

ON/ Close

A

Port: (F)

(7)

Pressure Holding Valve (Rear Left)

OFF/ Open

ON/ Close

A

A

Port: (G)

Rear Brake

(10)

Pressure Reduction Valve (Rear Right)

OFF/ Close

A

A

ON/ Open

Port: (J)

Pressure Reduction Valve

OFF/ Close

(11)

(Rear Left)

A

A

A

Port: (K)

Wheel Cylinder Pressure

Right

Increase

Hold

Reduction

Left

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