Nissan Leaf. Manual — part 305
BRC-10
< SYSTEM DESCRIPTION >
[WITH VDC]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
INFOID:0000000010120019
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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]
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*: 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
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
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
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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.
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COMPONENT PARTS
BRC-13
< SYSTEM DESCRIPTION >
[WITH VDC]
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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).
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