Nissan Quest E52. Manual - part 229

COMPONENT PARTS

BRC-9

< SYSTEM DESCRIPTION >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000009651349

A.

Back of spiral cable assembly

B.

Inside instrument stay cover

C.

Inside engine room (RH side)

D.

ABS warning lamp, brake warning 
lamp, VDC warning lamp, VDC OFF 
indicator lamp (in combination 
meter)

E.

Brake pedal

F.

Steering knuckle

G.

Rear axle housing

JSFIA0965ZZ

BRC-10

< SYSTEM DESCRIPTION >

[WITH VDC]

COMPONENT PARTS

ABS Actuator and Electric Unit (Control Unit)

INFOID:0000000009651350

Electric unit (control unit) is integrated with actuator and comprehensively controls VDC function, TCS func-
tion, ABS function, EBD function and brake limited slip differential (BLSD) function.

ELECTRIC UNIT (CONTROL UNIT)

• Brake fluid pressure, engine and transaxle are controlled according to signals from each sensor.
• If malfunction is detected, the system enters fail-safe mode.

ACTUATOR

The following components are integrated with ABS actuator.

Pump

Feeds brake fluid by the motor.

Motor

Activates the pump according to signals from ABS actuator and electric unit (control unit).

Motor Relay

Operates the motor ON/OFF according to signals from ABS actuator and electric unit (control unit).

Actuator Relay (Main Relay)

Operates each valve ON/OFF according to signals from ABS actuator and electric unit (control unit).

ABS IN Valve

Switches the fluid pressure line to increase or hold according to signals from control unit.
NOTE:
Valve is a solenoid valve.

ABS OUT Valve

Switches the fluid pressure line to increase, hold or decrease according to signals from control unit.
NOTE:
Valve is a solenoid valve.

Cut Valve 1, Cut Valve2

Shuts off the ordinary brake line from master cylinder, when VDC function, TCS function and brake limited slip
differential (BLSD) function are activated.

Suction Valve 1, Suction Valve 2

No.

Components

Function

1.

TCM

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

2.

ECM

Mainly transmits the following signals to ABS actuator and electric unit (control 
unit) via CAN communication.
• Accelerator pedal position signal
• Engine speed signal
Mainly receives the following signals from ABS actuator and electric unit (control 
unit) via CAN communication.
• Target throttle position signal

3.

VDC OFF switch

BRC-12, "VDC OFF Switch"

4.

Steering angle sensor

BRC-11, "Steering Angle Sensor"

5.

Yaw rate/side G sensor

BRC-11, "Yaw Rate/Side G Sensor"

6.

ABS actuator and electric unit (control unit)

BRC-10, "ABS Actuator and Electric Unit (Control Unit)"

7.

Stop lamp switch

BRC-11, "Stop Lamp Switch"

8.

Front wheel sensor

BRC-11, "Wheel Sensor and Sensor Rotor"

9.

Rear wheel sensor

COMPONENT PARTS

BRC-11

< SYSTEM DESCRIPTION >

[WITH VDC]

C

D

E

G

H

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J

K

L

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A

B

BRC

N

O

P

Supplies the brake fluid from master cylinder to the pump, when VDC function, TCS function and brake limited
slip differential (BLSD) function are activated.

Inlet Valve

Brake fluid sucked from the reservoir by the pump does not backflow.
NOTE:
Valve is a check valve.

Outlet Valve

Brake fluid discharged from the pump does not backflow.
NOTE:
Valve is a check valve.

Return Check Valve

Returns the brake fluid from brake caliper to master cylinder by bypassing orifice of each valve when brake is
released.

Pressure sensor

Detects the brake fluid pressure and transmits signal to control unit.

Reservoir

Temporarily reserves the brake fluid drained from brake caliper, so that pressure efficiently decreases when
decreasing pressure of brake caliper.

Damper

Reduces the vibrations travelling to the brake pedal during the operation of the VDC function, TCS function,
ABS function, EBD function, or brake limited slip differential (BLSD) function.

Wheel Sensor and Sensor Rotor

INFOID:0000000009651351

NOTE:
• Wheel sensor of front wheel is installed on steering knuckle.
• Sensor rotor of front wheel is integrated in wheel hub and bearing assembly.
• Wheel sensor of rear wheel is installed on axle housing.
• Sensor rotor of rear wheel is integrated in wheel hub and bearing assembly.
• Never measure resistance and voltage value using a tester because sensor is active sensor.
• Downsize and weight reduction is aimed. IC for detection portion

and magnet for sensor rotor are adopted.

• Power supply is supplied to detection portion so that magnetic field

line is read. Magnetic field that is detected is converted to current
signal.

• When sensor rotor rotates, magnetic field changes. Magnetic field

change is converted to current signals (rectangular wave) and is
transmitted to ABS actuator and electric unit (control unit). Change
of magnetic field is proportional to wheel speed.

Stop Lamp Switch

INFOID:0000000009651352

Detects the operation status of brake pedal and transmits converted electric signal to ABS actuator and elec-
tric unit (control unit).

Steering Angle Sensor

INFOID:0000000009651353

Detects the following information and transmits steering angle signal to ABS actuator and electric unit (control
unit) via CAN communication.
• Steering wheel rotation amount
• Steering wheel rotation angular velocity
• Steering wheel rotation direction

Yaw Rate/Side G Sensor

INFOID:0000000009651354

Calculates the following information that affects the vehicle, and transmits a signal to ABS actuator and elec-
tric unit (control unit) via communication lines.

JPFIC0131GB

BRC-12

< SYSTEM DESCRIPTION >

[WITH VDC]

COMPONENT PARTS

• Vehicle rotation angular velocity (yaw rate signal)
• Vehicle lateral acceleration (side G signal)

Brake Fluid Level Switch

INFOID:0000000009651355

Detects the brake fluid level in reservoir tank and transmits converted electric signal from combination meter to
ABS actuator and electric unit (control unit) via CAN communication, when brake fluid level is the specified
level or less.

VDC OFF Switch

INFOID:0000000009651356

• This is an integrated switch with switches for other functions.
• Non-operational status or standby status of the following functions can be selected using VDC OFF switch.

VDC OFF indicator lamp indicates the operation status of function. (ON: Non-operational status, OFF:
Standby status)

- VDC function
- TCS function
NOTE:
ABS function, EBD function and Brake limited slip differential (BLSD) function control operates.
• VDC OFF indicator lamp turns OFF (standby status) when the engine is started again after it is stopped once

while VDC OFF indicator lamp is ON (non-operational status).