Nissan Juke (2012 year). Service Repair Manual — part 24
BRC-3
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Diagnosis Procedure . . . . . . . . . . . .
SYMPTOM DIAGNOSIS . . . . . . .
EXCESSIVE OPERATION FREQUENCY . .
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
UNEXPECTED BRAKE PEDAL REACTION ...
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
THE BRAKING DISTANCE IS LONG . . . ..
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
DOES NOT OPERATE . . . . . . . . . .
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
BRAKE PEDAL VIBRATION OR OPERA-
TION SOUND OCCURS . . . . . . . . ...
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
VEHICLE JERKS DURING . . . . . . . ..
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
NORMAL OPERATING CONDITION . . . ...
Description . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . .
WHEEL SENSOR . . . . . . . . . . . .
FRONT WHEEL SENSOR . . . . . . . . . ...
FRONT WHEEL SENSOR : Exploded View . . .
FRONT WHEEL SENSOR : Removal and Instal-
lation . . . . . . . . . . . . . . . . . ..
REAR WHEEL SENSOR . . . . . . . . . . .
REAR WHEEL SENSOR : Exploded View . . .
REAR WHEEL SENSOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . . .
SENSOR ROTOR . . . . . . . . . . .
FRONT SENSOR ROTOR . . . . . . . . . ...
FRONT SENSOR ROTOR : Removal and Instal-
lation . . . . . . . . . . . . . . . . . ..
REAR SENSOR ROTOR . . . . . . . . . . .
REAR SENSOR ROTOR : Removal and Installa-
tion . . . . . . . . . . . . . . . . . . .
ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT) . . . . . . . . . . ...
Exploded View . . . . . . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
YAW RATE/SIDE/DECEL G SENSOR . . ...
Exploded View . . . . . . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
STEERING ANGLE SENSOR . . . . . . .
Removal and Installation . . . . . . . . . ...
VDC OFF SWITCH . . . . . . . . . . ..
Removal and Installation . . . . . . . . . ...
Revision: 2011 October
2012 JUKE
BRC-4
< PRECAUTION >
[WITH VDC]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000007818162
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see “SRS AIR BAG”.
• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, never use air or electric power tools or strike near the sensor(s) with
a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Precaution for Procedure without Cowl Top Cover
INFOID:0000000007818163
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc to prevent damage to
windshield.
Precaution for Brake System
INFOID:0000000007576782
WARNING:
Since dust covering the front and rear brakes has an affect on human body, the dust must be removed
with a dust collector. Never splatter the dust with an air blow gun.
• Brake fluid use refer to
MA-10, "Fluids and Lubricants"
.
• Never reuse drained brake fluid.
• Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it off
immediately and wash with water if it gets on a painted surface.
• Always confirm the specified tightening torque when installing the brake pipes.
PIIB3706J
Revision: 2011 October
2012 JUKE
PRECAUTIONS
BRC-5
< PRECAUTION >
[WITH VDC]
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• After pressing the brake pedal more deeply or harder than normal driving, such as air bleeding, check the
each item of brake pedal. Adjust brake pedal if it is outside the standard value.
• Never use mineral oils such as gasoline or light oil to clean. They may damage rubber parts and cause
improper operation.
• Always loosen the brake tube flare nut with a flare nut wrench.
• Tighten the brake tube flare nut to the specified torque with a crow-
foot (A) and torque wrench (B).
• Turn the ignition switch OFF and disconnect the ABS actuator and
electric unit (control unit) harness connector or the battery negative
terminal before performing the work.
• Check that no brake fluid leakage is present after replacing the
parts.
Precaution for Brake Control system
INFOID:0000000007576783
• Always perform a pre-driving check to drive the vehicle.
• Always check speed and safety while driving the vehicle.
• To operate CONSULT while driving, more than one person is required to be in the vehicle to avoid interfer-
ence to driving and ensure safety.
• Slight vibrations are felt on the brake pedal and the operation noises occur, when VDC function, TCS func-
tion, ABS function EBD function or brake limited slip differential (BLSD) function operates. This is not a mal-
function because it is caused by VDC function, TCS function, ABS function EBD function or brake limited slip
differential (BLSD) function that is normally operated.
• When starting engine or when starting vehicle just after starting engine, brake pedal may vibrate or motor
operating noise may be heard from engine compartment. This is normal condition.
• Brake stopping distance may become longer than models without ABS function depending on the road con-
ditions, when ABS function is operated on slippery road like rough road, gravel road or snowy road.
• When a malfunction is indicated, always collect information from the customer about conditions of occur-
rence, estimate cause and perform operation. Check brake booster operation, brake fluid level and brake
fluid leakage, as well as electrical system.
• The optimum performance is achieved by control for VDC function, TCS function, ABS function EBD func-
tion and brake limited slip differential (BLSD) function when all of brakes, suspensions and tires installed on
the vehicle are the specified size and parts. Brake performance and controllability may be negatively
affected when other parts than the specified are installed.
• Brake stopping distance may become longer and steering stability may be negatively affected, when tires in
different size and combination or other parts than the specified are used.
• When a radio (including wiring), antenna and antenna lead line are located near ABS actuator and electric
unit (control unit), a malfunction or improper operation may occur for the control of VDC function, TCS func-
tion, ABS function EBD function and brake limited slip differential (BLSD) function.
• When the following items are replaced by other parts than genuine parts or modified, ABS warning lamp,
brake warning lamp and VDC warning lamp may turn ON, and the control may not operate normally for VDC
function, TCS function, ABS function EBD function and brake limited slip differential (BLSD) function.
- Suspension component parts (shock absorber, spring, bushing and others)
- Tire and wheel (other than the specified size)
- Brake component parts (brake pad, disc rotor, brake caliper and others)
- Engine component parts (ECM, muffler and others)
- Body reinforcement component parts (rollover bar, tower bar and others)
• When suspension, tire and brake component parts are excessively worn or deteriorated and the vehicle is
driven, ABS warning lamp, brake warning lamp and VDC warning lamp may turn ON, and the control may
not operate normally for VDC function, TCS function, ABS function EBD function and brake limited slip differ-
ential (BLSD) function.
• ABS warning lamp, brake warning lamp and VDC warning lamp may turn ON, when only front wheel or rear
wheel is rotated using a free roller. This is not a malfunction, because it is caused by wheel speed difference
between wheel that is rotated and wheel that is not rotated. In this case, perform self-diagnosis, check self-
diagnosis results, and erase memory.
• When power supply voltage is not normal, ABS warning lamp, brake warning lamp and VDC warning lamp
turn ON. ABS actuator and electric unit (control unit) stops control for VDC function, TCS function, ABS func-
JPFIA0001ZZ
Revision: 2011 October
2012 JUKE
BRC-6
< PRECAUTION >
[WITH VDC]
PRECAUTIONS
tion EBD function and brake limited slip differential (BLSD) function. Ordinary brake operates. After power
supply returns to normal, ABS warning lamp, brake warning lamp and VDC warning lamp turn OFF. The con-
trol becomes operative for VDC function, TCS function, ABS function EBD function and brake limited slip dif-
ferential (BLSD) function.
• Brake pedal vibrates and operation sound occurs during sudden acceleration and cornering, when VDC
function, TCS function or brake limited slip differential (BLSD) function is operated. This is not a malfunction
because it is caused by VDC function, TCS function or brake limited slip differential (BLSD) function that is
operated normally.
• VDC warning lamp may turn ON and VDC function, TCS function and brake limited slip differential (BLSD)
function may not normally operate, when driving on a special road the is extremely slanted (bank in a circuit
course). This is not a malfunction if the status returns to normal for VDC function, TCS function and brake
limited slip differential (BLSD) function after the engine is started again. In this case, perform self-diagnosis,
check self-diagnosis results, and erase memory.
• A malfunction in yaw rate/side/decel G sensor system may be detected when the vehicle sharply turns dur-
ing a spin turn, acceleration turn or drift driving while VDC function, TCS function and brake limited slip dif-
ferential (BLSD) function are OFF (VDC OFF switch is pressed and VDC OFF indicator lamp is in ON
status). This is not a malfunction if the status returns to normal for VDC function, TCS function and brake
limited slip differential (BLSD) function after the engine is started again. In this case, perform self-diagnosis,
check self-diagnosis results, and erase memory.
Precaution for Harness Repair
INFOID:0000000007576784
• Solder the repair part, and wrap it with tape. [Twisted wire fray
must be 110 mm (4.33 in) or less.]
• Never bypass the repair point with wire. (If it is bypassed, the turn-
out point cannot be separated and the twisted wire characteristics
are lost.)
SKIB8766E
SKIB8767E
Revision: 2011 October
2012 JUKE
PREPARATION
BRC-7
< PREPARATION >
[WITH VDC]
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PREPARATION
PREPARATION
Commercial Service Tool
INFOID:0000000007576785
Tool name
Description
Power tool
Loosening bolts and nuts
PBIC0190E
Revision: 2011 October
2012 JUKE
BRC-8
< SYSTEM DESCRIPTION >
[WITH VDC]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
INFOID:0000000007576786
2WD
1.
TROL SYSTEM :
Component Parts Location"
.
2.
TCM
*
Refer to
SYSTEM : Component Parts Loca-
tion"
.
3.
Yaw rate/side/decel G sensor
4.
ABS actuator and electric unit (con-
trol unit)
5.
Front wheel sensor
6.
Stop lamp switch
7.
Brake pedal position switch
8.
Steering angle sensor
9.
Rear wheel sensor
A.
Under floor carpet (front seat right
side)
B.
Inside engine room
C.
Steering knuckle
JSFIA0643ZZ
Revision: 2011 October
2012 JUKE
COMPONENT PARTS
BRC-9
< SYSTEM DESCRIPTION >
[WITH VDC]
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*: Models with CVT
AWD
D.
Brake pedal
E.
ABS warning lamp, brake warning
lamp, VDC warning lamp, VDC OFF
indicator lamp (in combination
meter)
F.
Back of spiral cable assembly
G.
Rear wheel hub and bearing assem-
bly
1.
TROL SYSTEM :
Component Parts Location"
.
2.
TCM
Refer to
SYSTEM : Component Parts Loca-
tion"
.
3.
4.
Yaw rate/side/decel G sensor
5.
ABS actuator and electric unit (con-
trol unit)
6.
Front wheel sensor
7.
Stop lamp switch
8.
Brake pedal position switch
9.
Steering angle sensor
10. Rear wheel sensor
JSFIA0644ZZ
Revision: 2011 October
2012 JUKE
BRC-10
< SYSTEM DESCRIPTION >
[WITH VDC]
COMPONENT PARTS
Component Description
INFOID:0000000007576787
*1: Models with CVT
*2: AWD models
Wheel Sensor and Sensor Rotor
INFOID:0000000007576788
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 wheel hub and bearing assembly. (2WD)
• Wheel sensor of rear wheel is installed on axle housing. (AWD)
• Sensor rotor of rear wheel is integrated in wheel hub and bearing assembly. (2WD)
• Sensor rotor of rear wheel is integrated on drive shaft. (AWD)
• Never measure resistance and voltage value using a tester because sensor is active sensor.
A.
Under floor carpet (front seat right
side)
B.
Inside engine room
C.
Steering knuckle
D.
Brake pedal
E.
ABS warning lamp, brake warning
lamp, VDC warning lamp, VDC OFF
indicator lamp (in combination
meter)
F.
Back of spiral cable assembly
G.
Rear axle housing
Component
Reference/Function
ABS actuator and electric unit (control unit)
BRC-11, "ABS Actuator and Electric Unit (Control Unit)"
Wheel sensor
BRC-10, "Wheel Sensor and Sensor Rotor"
Stop lamp switch
Brake pedal position switch
BRC-12, "Brake Pedal Position Switch"
Steering angle sensor
BRC-12, "Steering Angle Sensor"
Yaw rate/side/decel G sensor
BRC-12, "Yaw Rate/Side/Decel G Sensor"
VDC OFF switch
Brake fluid level switch
BRC-12, "Brake Fluid Level Switch"
Parking brake switch
BRC-12, "Parking Brake Switch"
VDC warning lamp
ABS warning lamp
Brake warning lamp
VDC OFF indicator lamp
ECM
Mainly transmits the following signals to ABS actuator and elec-
tric 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
TCM
*1
Mainly transmits the following signals to ABS actuator and elec-
tric unit (control unit) via CAN communication.
• N range signal
• P range signal
• R range signal
• Current gear position signal
AWD control module
*2
Mainly transmits the following signals to ABS actuator and elec-
tric unit (control unit) via CAN communication.
• Current AWD mode signal
Revision: 2011 October
2012 JUKE
COMPONENT PARTS
BRC-11
< SYSTEM DESCRIPTION >
[WITH VDC]
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• 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:0000000007576789
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
Returns the brake fluid reserved in reservoir to master cylinder by reducing pressure.
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
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.
JPFIC0131GB
Revision: 2011 October
2012 JUKE
BRC-12
< SYSTEM DESCRIPTION >
[WITH VDC]
COMPONENT PARTS
Reservoir
Temporarily reserves the brake fluid drained from brake caliper, so that pressure efficiently decreases when
decreasing pressure of brake caliper.
Stop Lamp Switch
INFOID:0000000007576790
Detects the operation status of brake pedal and transmits converted electric signal to ABS actuator and elec-
tric unit (control unit).
Brake Pedal Position Switch
INFOID:0000000007576791
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:0000000007576792
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/Decel G Sensor
INFOID:0000000007576793
Calculates the following information that affects the vehicle, and transmits a signal to ABS actuator and elec-
tric unit (control unit) via communication lines.
• Vehicle rotation angular velocity (yaw rate signal)
• Vehicle lateral acceleration (side G signal) and longitudinal acceleration (decel G signal)
VDC OFF Switch
INFOID:0000000007576794
• 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
NOTE:
Brake limited slip differential (BLSD) function control operates.
- TCS function
• 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).
Brake Fluid Level Switch
INFOID:0000000007576795
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.
Parking Brake Switch
INFOID:0000000007576796
Detects the operation status of parking brake switch and transmits converted electric signal from combination
meter to ABS actuator and electric unit (control unit).
Revision: 2011 October
2012 JUKE
SYSTEM
BRC-13
< SYSTEM DESCRIPTION >
[WITH VDC]
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SYSTEM
System Description
INFOID:0000000007576797
• The system switches fluid pressure of each brake caliper to increase, to hold or to decrease according to
signals from control unit in ABS actuator and electric unit (control unit). This control system is applied to
VDC function, TCS function, ABS function, EBD function and brake limited slip differential (BLSD) function.
• Fail-safe function is available for each function and is activated by each function when system malfunction
occurs.
SYSTEM DIAGRAM
NOTE:
• TCM is CVT models only.
• AWD control module is AWD models only.
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
JSFIA0645GB
Revision: 2011 October
2012 JUKE
BRC-14
< SYSTEM DESCRIPTION >
[WITH VDC]
SYSTEM
VDC function, TCS function, ABS function, EBD function, Brake limited slip differential (BLSD) function
*1: Communication line between yaw rate/side/decel G sensor and ABS actuator and electric unit (control unit)
*2: Models with CVT
*3: AWD models
VALVE OPERATION [VDC FUNCTION, TCS FUNCTION AND BRAKE LIMITED SLIP DIFFEREN-
TIAL (BLSD) FUNCTION
The control unit built in the ABS actuator and electric unit (control unit) controls fluid pressure of the brake cal-
ipers, respectively, by operating each valve.
When VDC Function, TSC Function and Brake Limited Slip Differential (BLSD) Function is in Operation (During Pres-
Component
Signal description
Steering angle sensor
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Steering angle sensor signal
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
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
TCM
*2
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• N range signal
• P range signal
• R range signal
• Current gear position signal
AWD control module
*3
Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN
communication.
• Current AWD mode signal
Combination meter
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN
communication.
• Brake fluid level switch signal
• ABS warning lamp signal
• Brake warning lamp signal
• VDC warning lamp signal
• VDC OFF indicator lamp signal
Revision: 2011 October
2012 JUKE
SYSTEM
BRC-15
< SYSTEM DESCRIPTION >
[WITH VDC]
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sure Increases)
During pressure front RH brake caliper increases
• Brake fluid is conveyed to the pump from the master cylinder through suction valve 2 and is pressurized by
the pump operation. The pressurized brake fluid is supplied to the front RH brake caliper through the ABS IN
valve. For the left caliper, brake fluid pressure is maintained because the pressurization is unnecessary. The
pressurization for the left caliper is controlled separately from the right caliper.
During pressure front LH brake caliper increases
• Brake fluid is conveyed to the pump from the master cylinder through suction valve 1 and is pressurized by
the pump operation. The pressurized brake fluid is supplied to the front LH brake caliper through the ABS IN
valve. For the right caliper, brake fluid pressure is maintained because the pressurization is unnecessary.
The pressurization for the right caliper is controlled separately from the left caliper.
During pressure rear RH brake caliper increases
• Brake fluid is conveyed to the pump from the master cylinder through suction valve 1 and is pressurized by
the pump operation. The pressurized brake fluid is supplied to the rear RH brake caliper through the ABS IN
valve. For the left caliper, brake fluid pressure is maintained because the pressurization is unnecessary. The
pressurization for the left caliper is controlled separately from the right caliper.
During pressure rear LH brake caliper increases
• Brake fluid is conveyed to the pump from the master cylinder through suction valve 2 and is pressurized by
the pump operation. The pressurized brake fluid is supplied to the rear LH brake caliper through the ABS IN
JSFIA0646GB
Name
Not activated
During pressure increases
Cut valve 1
Power supply is not supplied (open)
Power supply is supplied (close)
Cut valve 2
Power supply is not supplied (open)
Power supply is supplied (close)
Suction valve 1
Power supply is not supplied (close)
Power supply is supplied (open)
Suction valve 2
Power supply is not supplied (close)
Power supply is supplied (open)
ABS IN valve
Power supply is not supplied (open)
Power supply is not supplied (open)
ABS OUT valve
Power supply is not supplied (close)
Power supply is not supplied (close)
Each brake caliper (fluid pressure)
—
Pressure increases
Revision: 2011 October
2012 JUKE
BRC-16
< SYSTEM DESCRIPTION >
[WITH VDC]
SYSTEM
valve. For the right caliper, brake fluid pressure is maintained because the pressurization is unnecessary.
The pressurization for the right caliper is controlled separately from the left caliper.
When VDC Function, TSC Function and Brake Limited Slip Differential (BLSD) Function is Starts Operating (During
Pressure Holds)
During pressure front RH brake caliper holds
• Since the cut valve 2 and the suction valve 2 are closed, the front RH brake caliper, master cylinder, and res-
ervoir are blocked. This maintains fluid pressure applied on the front RH brake caliper. The pressurization for
the left caliper is controlled separately from the right caliper.
During pressure front LH brake caliper holds
• Since the cut valve 1 and the suction valve 1 are closed, the front LH brake caliper, master cylinder, and res-
ervoir are blocked. This maintains fluid pressure applied on the front LH brake caliper. The pressurization for
the right caliper is controlled separately from the left caliper.
During pressure rear RH brake caliper holds
• Since the cut valve 1 and the suction valve 1 are closed, the rear RH brake caliper, master cylinder, and res-
ervoir are blocked. This maintains fluid pressure applied on the rear RH brake caliper. The pressurization for
the left caliper is controlled separately from the right caliper.
During pressure rear LH brake caliper holds
JSFIA0647GB
Name
Not activated
During pressure holds
Cut valve 1
Power supply is not supplied (open)
Power supply is supplied (close)
Cut valve 2
Power supply is not supplied (open)
Power supply is supplied (close)
Suction valve 1
Power supply is not supplied (close)
Power supply is not supplied (close)
Suction valve 2
Power supply is not supplied (close)
Power supply is not supplied (close)
ABS IN valve
Power supply is not supplied (open)
Power supply is not supplied (open)
ABS OUT valve
Power supply is not supplied (close)
Power supply is not supplied (close)
Each brake caliper (fluid pressure)
—
Pressure holds
Revision: 2011 October
2012 JUKE
SYSTEM
BRC-17
< SYSTEM DESCRIPTION >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
• Since the cut valve 2 and the suction valve 2 are closed, the rear LH brake caliper, master cylinder, and res-
ervoir are blocked. This maintains fluid pressure applied on the rear LH brake caliper. The pressurization for
the right caliper is controlled separately from the left caliper.
When VDC Function, TSC Function and Brake Limited Slip Differential (BLSD) Function is in Operation (During Pres-
sure Decreases)
During pressure front RH brake caliper decreases
• Since the suction valve 2 and the ABS OUT valve close and the cut valve 2 and the ABS IN valve open, the
fluid pressure applied on the front RH brake caliper is reduced by supplying the fluid pressure to the master
cylinder via the ABS IN valve and the cut valve 2. The pressurization for the right caliper is controlled sepa-
rately from the left caliper.
During pressure front LH brake caliper decreases
• Since the suction valve 1 and the ABS OUT valve close and the cut valve 1 and the ABS IN valve open, the
fluid pressure applied on the front LH brake caliper is reduced by supplying the fluid pressure to the master
cylinder via the ABS IN valve and the cut valve 2. The pressurization for the left caliper is controlled sepa-
rately from the right caliper.
During pressure rear RH brake caliper decreases
• Since the suction valve 1 and the ABS OUT valve close and the cut valve 1 and the ABS IN valve open, the
fluid pressure applied on the rear RH brake caliper is reduced by supplying the fluid pressure to the master
cylinder via the ABS IN valve and the cut valve 2. The pressurization for the right caliper is controlled sepa-
rately from the left caliper.
JSFIA0648GB
Name
Not activated
During pressure decreases
Cut valve 1
Power supply is not supplied (open)
Power supply is not supplied (open)
Cut valve 2
Power supply is not supplied (open)
Power supply is not supplied (open)
Suction valve 1
Power supply is not supplied (close)
Power supply is not supplied (close)
Suction valve 2
Power supply is not supplied (close)
Power supply is not supplied (close)
ABS IN valve
Power supply is not supplied (open)
Power supply is not supplied (open)
ABS OUT valve
Power supply is not supplied (close)
Power supply is not supplied (close)
Each brake caliper (fluid pressure)
—
Pressure decreases
Revision: 2011 October
2012 JUKE
BRC-18
< SYSTEM DESCRIPTION >
[WITH VDC]
SYSTEM
During pressure rear LH brake caliper decreases
• Since the suction valve 2 and the ABS OUT valve close and the cut valve 2 and the ABS IN valve open, the
fluid pressure applied on the rear LH brake caliper is reduced by supplying the fluid pressure to the master
cylinder via the ABS IN valve and the cut valve 2. The pressurization for the left caliper is controlled sepa-
rately from the right caliper.
Component Parts and Function
VALVE OPERATION (ABS FUNCTION AND EBD FUNCTION)
The control unit built in the ABS actuator and electric unit (control unit) controls fluid pressure of the brake cal-
ipers, respectively, by operating each valve.
When Brake Pedal is Applied or ABS Function is in Operation (During Pressure Increases)
Component
Function
Pump
Returns the brake fluid reserved in reservoir to master cylinder by reducing pressure.
Motor
Activates the pump according to signals from ABS actuator and electric unit (control unit).
Cut valve 1
Cut valve 2
Shuts off the ordinary brake line from master cylinder.
Suction valve 1
Suction valve 2
Supplies the brake fluid from master cylinder to the pump.
ABS IN valve
Switches the fluid pressure line to increase or hold according to signals from control unit.
ABS OUT valve
Switches the fluid pressure line to increase, hold or decrease according to signals from control unit.
Inlet valve
Brake fluid sucked from the reservoir by the pump does not backflow.
Outlet valve
Brake fluid discharged from the pump does not backflow.
Return check valve
Returns the brake fluid from brake caliper and wheel cylinder to master cylinder by bypassing orifice
of each valve when brake is released.
Reservoir
Temporarily reserves the brake fluid drained from brake caliper, so that pressure efficiently decreas-
es when decreasing pressure of brake caliper and wheel cylinder.
JSFIA0649GB
Name
Not activated
During pressure increases
Cut valve 1
Power supply is not supplied (open)
Power supply is not supplied (open)
Cut valve 2
Power supply is not supplied (open)
Power supply is not supplied (open)
Revision: 2011 October
2012 JUKE
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