Infiniti QX56 (Z62). Manual - part 133

SYSTEM

BRC-17

< SYSTEM DESCRIPTION >

[WITH VDC]

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BRC

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*1: Communication line between yaw rate/side/decal G sensor and ABS actuator and electric unit (control unit)
*2: Models with 4WD system

VALVE OPERATION

Each valve is operated and fluid pressure of brake caliper is controlled.

When Ordinary Brake is Applied

NOTE:
Control pressure sensor is applied to models with Advanced Driver Assistance System.

TCM

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Shift position signal
• Current gear position signal

Transfer control unit

*2

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Current 4WD mode signal

Steering angle sensor

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Steering angle sensor signal

Combination meter

Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN 
communication.
• ABS warning lamp signal
• Brake warning lamp signal
• VDC warning lamp signal
• VDC OFF indicator lamp

Component

Signal description

Name

Not activated

When depressing brake pedal

Cut valve 1

Power supply is not supplied (open)

Power supply is not supplied (open)

Cut valve 2

Power supply is not supplied (open)

Power supply is not supplied (open)

Suction valve 1

Power supply is not supplied (close)

Power supply is not supplied (close)

Suction valve 2

Power supply is not supplied (close)

Power supply is not supplied (close)

JPFIC0150GB

BRC-18

< SYSTEM DESCRIPTION >

[WITH VDC]

SYSTEM

Front RH caliper

• Pressurized brake fluid from accumulator is supplied to front RH caliper through master cylinder part, cut

valve 1 and ABS IN valve.

Front LH caliper

• Pressurized brake fluid from accumulator is supplied to front LH caliper through master cylinder part, cut

valve 1 and ABS IN valve.

Rear RH caliper

• Pressurized brake fluid from accumulator is supplied to rear RH caliper through master cylinder part, cut

valve 2 and ABS IN valve.

Rear LH caliper

• Pressurized brake fluid from accumulator is supplied to rear LH caliper through master cylinder part, cut

valve 2 and ABS IN valve.

ABS is Operation (When Pressure Increases)

NOTE:
Control pressure sensor is applied to models with Advanced Driver Assistance System.

ABS IN valve

Power supply is not supplied (open)

Power supply is not supplied (open)

ABS OUT valve

Power supply is not supplied (close)

Power supply is not supplied (close)

Each caliper (fluid pressure)

—

Pressure increases

Name

Not activated

When depressing brake pedal

Name

Not activated

When Pressure Increases

Cut valve 1

Power supply is not supplied (open)

Power supply is supplied (close)

Cut valve 2

Power supply is not supplied (open)

Power supply is not supplied (open)

Suction valve 1

Power supply is not supplied (close)

Power supply is supplied (open)

Suction valve 2

Power supply is not supplied (close)

Power supply is not supplied (close)

ABS IN valve

Power supply is not supplied (open)

Power supply is not supplied (open)

JPFIC0153GB

SYSTEM

BRC-19

< SYSTEM DESCRIPTION >

[WITH VDC]

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BRC

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Front RH caliper

• Pressurized brake fluid from accumulator is supplied to front RH caliper through master cylinder part, cut

valve 2, suction valve 1 and ABS IN valve.

Front LH caliper

• Pressurized brake fluid from accumulator is supplied to front LH caliper through master cylinder part, cut

valve 2, suction valve 1 and ABS IN valve.

Rear RH caliper

• Pressurized brake fluid from accumulator is supplied to rear RH caliper through master cylinder part, cut

valve 2 and ABS IN valve.

Rear LH caliper

• Pressurized brake fluid from accumulator is supplied to rear LH caliper through master cylinder part, cut

valve 2 and ABS IN valve.

ABS is Operation (When Pressure Holds)

NOTE:
Control pressure sensor is applied to models with Advanced Driver Assistance System.

ABS OUT valve

Power supply is not supplied (close)

Power supply is not supplied (close)

Each caliper (fluid pressure)

—

Pressure increases

Name

Not activated

When Pressure Increases

Name

Not activated

When Pressure Increases

Cut valve 1

Power supply is not supplied (open)

Power supply is supplied (close)

Cut valve 2

Power supply is not supplied (open)

Power supply is not supplied (open)

Suction valve 1

Power supply is not supplied (close)

Power supply is supplied (open)

Suction valve 2

Power supply is not supplied (close)

Power supply is not supplied (close)

ABS IN valve

Power supply is not supplied (open)

Power supply is supplied (close)

ABS OUT valve

Power supply is not supplied (close)

Power supply is not supplied (close)

Each caliper (fluid pressure)

—

Pressure holds

JPFIC0179GB

BRC-20

< SYSTEM DESCRIPTION >

[WITH VDC]

SYSTEM

Front RH caliper

• ABS IN valve is close, fluid pressure of front RH caliper is holds.

Front LH caliper

• ABS IN valve is close, fluid pressure of front LH caliper is holds.

Rear RH caliper

• ABS IN valve is close and fluid pressure of rear RH caliper is holds.

Rear LH caliper

• ABS IN valve is close and fluid pressure of rear LH caliper is holds.

ABS is Operation (When Pressure Decreases)

NOTE:
Control pressure sensor is applied to models with Advanced Driver Assistance System.

Front RH caliper

• Being returned to reservoir tank through ABS OUT valve, fluid pressure of front RH caliper is decreased.

Front LH caliper

• Being returned to reservoir tank through ABS OUT valve, fluid pressure of front LH caliper is decreased.

Rear RH caliper

• Being returned to reservoir tank through ABS OUT valve, fluid pressure of rear RH caliper is decreased.

Rear LH caliper

Name

Not activated

When pressure decreases

Cut valve 1

Power supply is not supplied (open)

Power supply is supplied (close)

Cut valve 2

Power supply is not supplied (open)

Power supply is not supplied (open)

Suction valve 1

Power supply is not supplied (close)

Power supply is supplied (open)

Suction valve 2

Power supply is not supplied (close)

Power supply is not supplied (close)

ABS IN valve

Power supply is not supplied (open)

Power supply is supplied (close)

ABS OUT valve

Power supply is not supplied (close)

Power supply is supplied (open)

Each caliper (fluid pressure)

—

Pressure decreases

JPFIC0152GB