Nissan Leaf. Instruction — 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
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]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
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
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]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
*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
.
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
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