Nissan Leaf. Manual - part 311

BRC-34

< SYSTEM DESCRIPTION >

[WITH VDC]

SYSTEM

EBD FUNCTION
EBD FUNCTION : System Description

INFOID:0000000010120035

• By preventing rear wheel slip increase through rear wheel brake force (brake fluid pressure) control that is

electronically controlled when slight skip on front and rear wheels are detected during braking, stability dur-

ing braking is improved.

• EBD function is expanded and developed from conventional ABS function and corrects rear wheel brake

force to appropriate level by electronic control according to load weight (number of passengers).

• During braking, control unit portion compares slight slip on front

and rear wheels by wheel speed sensor signal, transmits drive sig-

nal to actuator portion when rear wheel slip exceeds front wheel

slip for the specified value or more, and controls rear wheel brake

force (brake fluid pressure) so that increase of rear wheel slip is

prevented and slips on front wheel and rear wheel are nearly

equalized. ABS control is applied when slip on each wheel

increases and wheel speed is the threshold value of ABS control or

less.

• CONSULT can be used to diagnose the system diagnosis.

• Fail-safe function is adopted. When a malfunction occurs in EBD

function, the control is suspended for VDC function, TCS function,

ABS function, EBD function, brake limited slip differential (BLSD)

function and brake assist function. The vehicle status becomes the

same as models without VDC function, TCS function, ABS func-

tion, EBD function, brake limited slip differential (BLSD) function

and brake assist function. Refer to 

BRC-53, "Fail-safe"

.

Component

Signal description

Combination meter

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

JPFIC0142GB

JPFIC0143GB

SYSTEM

BRC-35

< SYSTEM DESCRIPTION >

[WITH VDC]

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BRC

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SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table.

BRAKE LIMITED SLIP DIFFERENTIAL (BLSD) FUNCTION
BRAKE LIMITED SLIP DIFFERENTIAL (BLSD) FUNCTION : System Description

INFOID:0000000010120036

• LH and RH driving wheel spin is always monitored. If necessary, appropriate brake force is independently

applied to LH or RH driving wheel so that one-sided wheel spin is avoided and traction is maintained. Mainly

starting ability is improved.

• Brake limited slip differential (BLSD) function operates while VDC function is in non-operational status (OFF)

by VDC OFF switch.

• VDC warning lamp blinking while brake limited slip differential (BLSD) function is in operation and indicates

to the driver that the function is in operation.

• Slight vibrations are felt on the brake pedal and the operation noises occur, when brake limited slip differen-

tial (BLSD) function operates. This is not a malfunction because it is caused by brake limited slip differential

(BLSD) function that is normally operated.

• Fail-safe function is adopted. When a malfunction occurs in brake limited slip differential (BLSD) function,

the control is suspended for VDC function, TCS function, brake limited slip differential (BLSD) function and

brake assist function. The vehicle status becomes the same as models without VDC function, TCS function,

brake limited slip differential (BLSD) function and brake assist function. However, ABS function and EBD

function are operated normally. Refer to 

BRC-53, "Fail-safe"

.

JPFIC0144GB

Component

Signal description

Combination meter

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

BRC-36

< SYSTEM DESCRIPTION >

[WITH VDC]

SYSTEM

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table.

JSFIA2065GB

Component

Signal description

Yaw rate/side/decel G sensor

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via com-
munication line

*1

:

• Yaw rate signal
• Side G sensor signal
• Decel G sensor signal

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

Electrically-driven intelligent brake

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication line

*2

:

• Electrically-driven intelligent brake control signal
• Brake warning lamp request signal
• Brake system warning lamp request signal

Steering angle sensor

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

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

SYSTEM

BRC-37

< SYSTEM DESCRIPTION >

[WITH VDC]

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*1: Communication line between yaw rate/side/decel G sensor and ABS actuator and electric unit (control unit)

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

unit (control unit)

BRAKE ASSIST FUNCTION
BRAKE ASSIST FUNCTION : System Description

INFOID:0000000010120037

• When the driver brakes hard in an emergency, the stopping distance is reduced by increasing brake fluid

pressure.

• Fail-safe function is adopted. When a malfunction occurs in brake assist function, the control is suspended

for VDC function, TCS function, brake limited slip differential (BLSD) function and brake assist function. The

vehicle status becomes the same as models without VDC function, TCS function, brake limited slip differen-

tial (BLSD) function and brake assist function. However, ABS function and EBD function are operated nor-

mally. Refer to 

BRC-53, "Fail-safe"

.

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table.

JSFIA2065GB

Component

Signal description

Yaw rate/side/decel G sensor

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via com-
munication line

*1

:

• Yaw rate signal
• Side G sensor signal
• Decel G sensor signal

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