Nissan Leaf. Manual - part 305

BRC-10

< SYSTEM DESCRIPTION >

[WITH VDC]

COMPONENT PARTS

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000010120019

ALFIA0456ZZ

Console body assembly

Inside motor room (right)

Inside motor room (left)

Steering knuckle

Brake pedal

Back of spiral cable assembly

Rear wheel hub assembly

COMPONENT PARTS

BRC-11

< SYSTEM DESCRIPTION >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

*: CAN communication line between electrically-driven intelligent brake unit and ABS actuator and electric unit

(control unit)

Wheel Sensor and Sensor Rotor

INFOID:0000000010120020

NOTE:

• Wheel sensor of front wheel is installed on steering knuckle.

• Sensor rotor of front wheel is integrated in wheel hub assembly.

No.

Component parts

Function

VCM

Mainly transmits the following signals to ABS actuator and electric 
unit (control unit) via CAN communication:
• Accelerator pedal position signal
• VCM control signal
• Shift position signal
Refer to 

EVC-15, "Component Parts Location"

 for detailed installa-

tion location.

Combination meter

Mainly transmits the following signals to ABS actuator and electric 
unit (control unit) via CAN communication:
• Brake fluid level switch signal
• Parking brake switch signal
Mainly receives the following signals from ABS actuator and electric 
unit (control unit) via CAN communication:
• ABS warning lamp signal
• VDC warning lamp signal
• Brake warning lamp signal
• Brake system warning lamp signal
• VDC OFF indicator lamp signal
Refer to 

MWI-6, "METER SYSTEM : Component Parts Location"

 

for detailed installation location.

VDC OFF switch

BRC-15, "VDC OFF Switch"

Yaw rate/side/decel G sensor

BRC-14, "Yaw Rate/Side/Decel G Sensor"

ABS actuator and electric unit (control unit)

BRC-12, "ABS Actuator and Electric Unit (Control Unit)"

Electrically-driven intelligent brake

Mainly transmits the following signals to ABS actuator and electric 
unit (control unit) via CAN communication and brake communica-
tion line*:
• Electrically-driven intelligent brake control signal
• Brake warning lamp request signal
• Brake system warning lamp request signal

Master cylinder pressure sensor

BRC-13, "Master Cylinder Pressure Sensor"

Front wheel sensor

BRC-11, "Wheel Sensor and Sensor Rotor"

Front sensor rotor

Stop lamp switch

BRC-13, "Stop Lamp Switch"

Brake pedal position switch

BRC-14, "Brake Pedal Position Switch"

Steering angle sensor

BRC-14, "Steering Angle Sensor"

Rear wheel sensor

BRC-11, "Wheel Sensor and Sensor Rotor"

Rear sensor rotor

JSFIA1140ZZ

BRC-12

< SYSTEM DESCRIPTION >

[WITH VDC]

COMPONENT PARTS

• Wheel sensor of rear wheel is installed on wheel hub assembly.

• Sensor rotor of rear wheel 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.

ABS Actuator and Electric Unit (Control Unit)

INFOID:0000000010120021

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 and brake assist

function.

ELECTRIC UNIT (CONTROL UNIT)

• Brake fluid pressure and traction motor 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

VDC function, TCS function, Brake limited slip differential (BLSD) function and brake assist function are in operation (during

pressure increases)

• Pressurized brake fluid from electrically-driven intelligent brake unit is supplied to each caliper.

ABS function and EBD function are in operation (during pressure decreases)

• Returns the brake fluid reserved in reservoir to electrically-driven intelligent brake unit by reducing pressure.

Motor

Activates the pump according to signals from control unit part.

Motor Relay

Operates the motor ON/OFF according to signals from control unit part.

Actuator Relay (Main Relay)

Operates each valve ON/OFF according to signals from control unit part.

JSFIA1141ZZ

JPFIC0131GB

JSFIA1142ZZ

COMPONENT PARTS

BRC-13

< SYSTEM DESCRIPTION >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

ABS IN Valve

Switches the fluid pressure line to increase or hold according to signals from control unit part.

NOTE:

Valve is a solenoid valve.

ABS OUT Valve

Switches the fluid pressure line to hold or decrease according to signals from control unit part.

NOTE:

Valve is a solenoid valve.

Cut Valve 1, Cut Valve 2

Shuts off the ordinary brake line from electrically-driven intelligent brake unit, when VDC function, TCS func-

tion, brake limited slip differential (BLSD) function and brake assist function are activated.

Suction Valve 1, Suction Valve 2

Supplies the brake fluid from electrically-driven intelligent brake unit to the pump, when VDC function, TCS

function, brake limited slip differential (BLSD) function and brake assist 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 electrically-driven intelligent brake unit by bypassing orifice of

each valve when brake is released.

Reservoir

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

decreasing pressure of brake caliper.

Master Cylinder Pressure Sensor

INFOID:0000000010120022

Detects the brake fluid pressure of master cylinder part and trans-

mits signal to ABS actuator and electric unit (control unit).

Stop Lamp Switch

INFOID:0000000010120023

Detects the operation status of brake pedal and transmits converted

electric signal to ABS actuator and electric unit (control unit).

JSFIA1133ZZ

JSFIA1143ZZ