Nissan Qashqai J11. Manual - part 943

COMPONENT PARTS

BRC-9

< SYSTEM DESCRIPTION >

[WITH ESP]

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G

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BRC

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Wheel Sensor and Sensor Rotor

INFOID:0000000010329779

NOTE:

A

Steering column (view with steering 
wheel removed)

B

Right side of instrument panel (view 
with instrument panel removed)

C

Left side of engine compartment

D

Right side of engine compartment

E

Left front wheel area

F

Instrument panel area

G

Left side of instrument panel

H

Left rear wheel area

No.

Component parts

Function

1

Steering angle sensor

BRC-11, "Steering Angle Sensor"

2

Chassis control module

Mainly transmits the following signals to ABS actuator and electric unit (con-
trol unit) via CAN communication.
• Drive mode signal
• Active Trace Control signal
• Brake hold status signal
• Brake hold request signal
Refer to 

GI-4, "Components"

 for detailed installation location.

3

Brake fluid level switch

BRC-11, "Brake Fluid Level Switch"

4

Vacuum sensor

BRC-12, "Vacuum Sensor"

5

ABS actuator and electric unit (control unit)

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

6

Front LH wheel sensor

BRC-9, "Wheel Sensor and Sensor Rotor"

7

Parking brake switch

BRC-12, "Parking Brake Switch"

8

VDC OFF switch

BRC-12, "VDC OFF Switch"

9

Parking sonar switch

BRC-12, "Parking Brake Switch"

10

Rear LH wheel parking brake actuatorsensor

PB-11, "Parking Brake Actuator"

11

Rear LH wheel sensor

BRC-9, "Wheel Sensor and Sensor Rotor"

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BRC-10

< SYSTEM DESCRIPTION >

[WITH ESP]

COMPONENT PARTS

• Wheel sensor of front wheel is installed on steering knuckle.
• Sensor rotor of front wheel is integrated in wheel hub assembly.
• Wheel sensor of rear wheel is installed on rear final drive.
• Sensor rotor of rear wheel is installed on drive shaft (rear final drive

side).

• Never measure resistance and voltage value using a tester

because sensor is active sensor.

• 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.

ABS Actuator and Electric Unit (Control Unit)

INFOID:0000000010329780

Electric unit (control unit) is integrated with actuator and comprehen-
sively controls VDC function, TCS function, ABS function, EBD func-
tion, Brake limited slip differential (BLSD) function, Brake assist
function, hill start assist function and Brake force distribution func-
tion.

ELECTRIC UNIT (CONTROL UNIT)

• Brake fluid pressure, engine and transmission 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

Returns the brake fluid reserved in reservoir to master cylinder by reducing pressure.

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

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

ABS IN Valve and ABS OUT Valve

Increases, holds or decreases the fluid pressure of each caliper according to signals from ABS actuator and
electric unit (control unit).

Pressure Sensor

Detects the brake fluid pressure and transmits signal to ABS actuator and electric unit (control unit).

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JPFIC0131GB

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COMPONENT PARTS

BRC-11

< SYSTEM DESCRIPTION >

[WITH ESP]

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Cut Valve 1 (Primary Line), Cut Valve 2 (Secondary Line)

Shuts off the ordinary brake line from master cylinder, when VDC function, TCS function, Brake limited slip dif-
ferential (BLSD) function, Brake assist function, hill start assist function and Brake force distribution function
are activated.

Yaw Rate/Side/Decel G Sensor

Calculates the following information that affects the vehicle, and transmits a signal to ABS actuator and elec-
tric unit (control unit). [Yaw rate/side/decel G sensor is integrated in ABS actuator and electric unit (control
unit).]
• Vehicle rotation angular velocity (yaw rate signal)
• Vehicle lateral acceleration (side G signal)
• Vehicle longitudinal acceleration (decel G signal)

Stop Lamp Switch

INFOID:0000000010329781

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

Steering Angle Sensor

INFOID:0000000010329782

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

Brake Fluid Level Switch

INFOID:0000000010329783

Detects the brake fluid level in reservoir tank and transmits con-
verted 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.

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BRC-12

< SYSTEM DESCRIPTION >

[WITH ESP]

COMPONENT PARTS

Vacuum Sensor

INFOID:0000000010329784

Detects the vacuum in brake booster and transmits converted elec-
tric signal to ABS actuator and electric unit (control unit).

Parking Brake Switch

INFOID:0000000010329785

Detects the operation status of parking brake switch and transmits
converted electric signal from combination meter to ABS actuator
and electric unit (control unit).

VDC OFF Switch

INFOID:0000000010329786

• 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
- Active trace control 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).

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