Nissan Quest E52. Instruction — part 229
COMPONENT PARTS
BRC-9
< SYSTEM DESCRIPTION >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
INFOID:0000000009651349
A.
Back of spiral cable assembly
B.
Inside instrument stay cover
C.
Inside engine room (RH side)
D.
ABS warning lamp, brake warning
lamp, VDC warning lamp, VDC OFF
indicator lamp (in combination
meter)
E.
Brake pedal
F.
Steering knuckle
G.
Rear axle housing
JSFIA0965ZZ
BRC-10
< SYSTEM DESCRIPTION >
[WITH VDC]
COMPONENT PARTS
ABS Actuator and Electric Unit (Control Unit)
INFOID:0000000009651350
Electric unit (control unit) is integrated with actuator and comprehensively controls VDC function, TCS func-
tion, ABS function, EBD function and brake limited slip differential (BLSD) function.
ELECTRIC UNIT (CONTROL UNIT)
• Brake fluid pressure, engine and transaxle 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
Feeds brake fluid by the motor.
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 (Main Relay)
Operates each valve ON/OFF according to signals from ABS actuator and electric unit (control unit).
ABS IN Valve
Switches the fluid pressure line to increase or hold according to signals from control unit.
NOTE:
Valve is a solenoid valve.
ABS OUT Valve
Switches the fluid pressure line to increase, hold or decrease according to signals from control unit.
NOTE:
Valve is a solenoid valve.
Cut Valve 1, Cut Valve2
Shuts off the ordinary brake line from master cylinder, when VDC function, TCS function and brake limited slip
differential (BLSD) function are activated.
Suction Valve 1, Suction Valve 2
No.
Components
Function
1.
TCM
Mainly transmits the following signals to ABS actuator and electric unit (control
unit) via CAN communication.
• Shift position signal
• Current gear position signal
• P range signal
• R range signal
• N range signal
2.
ECM
Mainly transmits the following signals to ABS actuator and electric 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
3.
VDC OFF switch
4.
Steering angle sensor
BRC-11, "Steering Angle Sensor"
5.
Yaw rate/side G sensor
BRC-11, "Yaw Rate/Side G Sensor"
6.
ABS actuator and electric unit (control unit)
BRC-10, "ABS Actuator and Electric Unit (Control Unit)"
7.
Stop lamp switch
8.
Front wheel sensor
BRC-11, "Wheel Sensor and Sensor Rotor"
9.
Rear wheel sensor
COMPONENT PARTS
BRC-11
< SYSTEM DESCRIPTION >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
Supplies the brake fluid from master cylinder to the pump, when VDC function, TCS function and brake limited
slip differential (BLSD) 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 master cylinder by bypassing orifice of each valve when brake is
released.
Pressure sensor
Detects the brake fluid pressure and transmits signal to control unit.
Reservoir
Temporarily reserves the brake fluid drained from brake caliper, so that pressure efficiently decreases when
decreasing pressure of brake caliper.
Damper
Reduces the vibrations travelling to the brake pedal during the operation of the VDC function, TCS function,
ABS function, EBD function, or brake limited slip differential (BLSD) function.
Wheel Sensor and Sensor Rotor
INFOID:0000000009651351
NOTE:
• Wheel sensor of front wheel is installed on steering knuckle.
• Sensor rotor of front wheel is integrated in wheel hub and bearing assembly.
• Wheel sensor of rear wheel is installed on axle housing.
• Sensor rotor of rear wheel is integrated in wheel hub and bearing 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:0000000009651352
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:0000000009651353
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 G Sensor
INFOID:0000000009651354
Calculates the following information that affects the vehicle, and transmits a signal to ABS actuator and elec-
tric unit (control unit) via communication lines.
JPFIC0131GB
BRC-12
< SYSTEM DESCRIPTION >
[WITH VDC]
COMPONENT PARTS
• Vehicle rotation angular velocity (yaw rate signal)
• Vehicle lateral acceleration (side G signal)
Brake Fluid Level Switch
INFOID:0000000009651355
Detects the brake fluid level in reservoir tank and transmits converted electric signal from combination meter to
ABS actuator and electric unit (control unit) via CAN communication, when brake fluid level is the specified
level or less.
VDC OFF Switch
INFOID:0000000009651356
• 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
- TCS function
NOTE:
ABS function, EBD function and Brake limited slip differential (BLSD) function control operates.
• 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).
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