Nissan Pathfinder. Instruction - part 237

COMPONENT PARTS

BRC-7

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000009177233

ALFIA0326ZZ

BRC-8

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

COMPONENT PARTS

Component Description

INFOID:0000000009177234

ABS Actuator and Electric Unit (Control Unit)

INFOID:0000000009177235

Electric unit (control unit) is integrated with actuator and motor/accumulator assembly and comprehensively

controls VDC function, TCS function, ABS function and EBD function.

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.

1.

IPDM E\R

2.

ABS actuator and electric unit (con-
trol unit) 

3.

Brake fluid level switch (part of brake 
fluid reservoir) 

4.

Vacuum sensor (attached to lower 
side of brake booster)

5.

Front wheel sensor LH (RH similar)

6.

Rear wheel sensor LH (RH similar)

7.

VDC OFF switch

8.

Steering angle sensor (view with 
steering wheel and steering column 
covers removed) 

9.

Yaw rate/side/decel G sensor (view 
with the center console removed) 

10. Stop lamp switch 

11. Combination meter 

12. Parking brake switch

13. Stop lamp relay 

Component

Reference/Function

ABS actuator and electric unit 
(control unit)

Pump/motor

BRC-8, "ABS Actuator and Electric Unit (Control Unit)"

Motor relay

Actuator relay (main relay)

ABS IN valve

ABS OUT valve

Cut valve 1

Cut valve 2

Pressure sensor

Wheel sensor

BRC-9, "Wheel Sensor and Sensor Rotor"

Stop lamp switch

BRC-9, "Stop Lamp Switch"

Steering angle sensor

BRC-9, "Steering Angle Sensor"

Yaw rate/side/decel G sensor

BRC-9, "Yaw Rate/Side/Decel G Sensor"

Vacuum sensor

BRC-10, "Vacuum Sensor"

Brake fluid level switch

BRC-10, "Brake Fluid Level Switch"

Parking brake switch

BRC-10, "Parking Brake Switch"

VDC OFF switch

BRC-10, "VDC OFF Switch"

ECM

Mainly transmits the following signals to ABS actuator and elec-
tric 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

TCM

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

ABS warning lamp

BRC-11, "System Description"

Brake warning lamp

VDC OFF indicator lamp

SLIP indicator lamp

COMPONENT PARTS

BRC-9

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

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).

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

Shuts off the ordinary brake line from master cylinder when VDC function, TCS function and hill start assist

function are activated.

Wheel Sensor and Sensor Rotor

INFOID:0000000009177236

NOTE:

• Wheel sensor and sensor rotor is integrated in wheel hub 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:0000000009177237

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:0000000009177238

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/Decel G Sensor

INFOID:0000000009177239

Calculates the following information that affects the vehicle and transmits a signal to ABS actuator and electric

unit (control unit) via communication lines:

• Vehicle rotation angular velocity (yaw rate signal)

• Vehicle lateral acceleration (side G signal) / longitudinal acceleration (decel G signal)

JPFIC0131GB

BRC-10

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

COMPONENT PARTS

Brake Fluid Level Switch

INFOID:0000000009177240

Detects the brake fluid level in reservoir tank and transmits converted electric signal from ABS actuator and

electric unit (control unit) when brake fluid level is the specified level or less.

Vacuum Sensor

INFOID:0000000009177241

Detects the vacuum in brake booster and transmits converted electric signal to ABS actuator and electric unit

(control unit).

Parking Brake Switch

INFOID:0000000009177242

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:0000000009177243

• 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

NOTE:

Brake limited slip differential (BLSD) control operates.

- TCS function

• 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).