2016 NISSAN NOTE Caliper

PRECAUTIONSBRC-5
< PRECAUTION > [VDC/TCS/ABS]
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Precaution for Brake Control SystemINFOID:0000000012430822
• Just after starting vehicle after ignition switch is ON, brake pedal may vibrate or motor operating noise may be heard from engine compartment. This is a normal condition.
• When an error is indicated by ABS or another warning lamp, collect all necessary information from customer
(what symptoms are present under what conditions) and check for simple causes before starting diagnostic
servicing. Besides electrical system inspection, c heck brake booster operation, brake fluid level and oil
leaks.
• If tire size and type are used in an improper combinati on or brake pads are not Genuine NISSAN parts, stop-
ping distance or steering stability may deteriorate.
• ABS might be out of order or malfunctions by putting a radio (wiring inclusive), an antenna and a lead-in wire
near the control unit.
• If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness pinches, open circuits, and improper wiring.
• VDC system may not operate normally or a VDC OFF indi cator lamp or SLIP indicator lamp may light.
- When replacing the following parts with parts other than genuine parts or making modifications: Suspension- related parts (shock absorber, spring, bushing, etc.), tire s, wheels (other than specified sizes), brake-related
parts (pad, rotor, caliper, etc.), engine-related parts (muffler, ECM, etc.) and body reinforcement-related parts
(roll bar, tower bar, etc.).
- When driving with worn or deteriorated suspension, tires and brake-related parts.
Precaution for Harness RepairINFOID:0000000012430823
• Solder the repair part, and wrap it with tape. [Twisted wire fray
must be 110 mm (4.33 in) or less.]
• Do not 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: August 2015 2016 Versa Note

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COMPONENT PARTSBRC-9
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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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.
Cut Valve 1, Cut Valve 2
Shuts off the ordinary brake line from master cylinder, when VDC function and TCS function are activated.
Suction Valve 1, Suction Valve 2
Supplies the brake fluid from master cylinder to the pump, when VDC function and TCS function are activated.
Return Check Valve
Returns the brake fluid from brake caliper and wheel cyli nder 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 decreases when
decreasing pressure of brake caliper and wheel cylinder.
Yaw rate/side/decel G sensor
Calculates the following information that affects the v ehicle, 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)
Pressure Sensor
Detects the brake fluid pressure and transmits signal to ABS actuator and electric unit (control unit).
Wheel Sensor and Sensor RotorINFOID:0000000012430829
NOTE:
• Wheel sensor of front wheel is installed on steering knuckle.
• Sensor rotor of front wheel is integrated in wheel hub assembly.
• Wheel sensor of rear wheel is installed on back plate of rear brake.
• Sensor rotor of rear wheel is installed on rear brake drum.
• 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 pr oportional to wheel speed.
Stop Lamp SwitchINFOID:0000000012430830
Detects the operation status of brake pedal and transmits converted electric signal to ABS actuator and elec-
tric unit (control unit).
Steering Angle SensorINFOID:0000000012430831
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
JPFIC0131GB
Revision: August 2015 2016 Versa Note

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SYSTEMBRC-11
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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SYSTEM
VDC/TCS/ABS
VDC/TCS/ABS : System DiagramINFOID:0000000012430835
VDC/TCS/ABS : Syst em DescriptionINFOID:0000000012430836
• The system switches fluid pressure of each brake caliper and each wheel cylinder 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, TCS, ABS and EBD functions.
• Fail-safe function is available for each function and is activated by each function when system malfunction
occurs.
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
ALFIA0331GB
Revision: August 2015 2016 Versa Note

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SYSTEMBRC-13
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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Front RH brake caliper
• 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 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 cont rolled separately from the right caliper.
Front LH brake caliper• 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 suppl ied 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.
Rear RH wheel cylinder
• 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 RH wheel cylinder through the ABS
IN valve. For the left wheel cylinder, brake fluid pressure is maintained because the pressurization is unnec-
essary. The pressurization for the left wheel cylinder is controlled separately from the right wheel cylinder.
Rear LH wheel cylinder• 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 s upplied to the rear LH wheel cylinder through the ABS
IN valve. For the right wheel cylinder, brake fluid pressure is maintained because the pressurization is
unnecessary. The pressurization for the right wheel cylinder is controlled separately from the left wheel cylin-
der.
VDC and TCS Functions Start Operating (Pressure Holds)
ABS OUT valve Power supply is not supplie d (close) Power supply is not supplied (close)
Each brake caliper and each wheel cylinder
(fluid pressure) —
Pressure increases
Name
Not activated Pressure increases
JSFIA0677GB
Revision: August 2015 2016 Versa Note

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BRC-14
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
Front RH brake caliper• Since the cut valve 1 and the suction valve 1 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.
Front LH brake caliper
• Since the cut valve 2 and the suction valve 2 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.
Rear RH wheel cylinder
• Since the cut valve 2 and the suction valve 2 are closed, the rear RH wheel cylinder, master cylinder, andreservoir are blocked. This maintains fluid pressure applied on the rear RH wheel cylinder. The pressuriza-
tion for the left wheel cylinder is controll ed separately from the right wheel cylinder.
Rear LH wheel cylinder• Since the cut valve 1 and the suction valve 1 are closed, the rear LH wheel cylinder, master cylinder, and
reservoir are blocked. This maintains fluid pressure applied on the rear LH wheel cylinder. The pressuriza-
tion for the right wheel cylinder is controlled separately from the left wheel cylinder.
VDC and TCS Functions Operating (Pressure Decreases)
Name Not activated 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 and wheel cylinder (fluid
pressure) —
Pressure holds
JSFIA0678GB
Revision: August 2015 2016 Versa Note

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SYSTEMBRC-15
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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Front RH brake caliper• Since the suction valve 1 and the ABS OUT valve are closed and the cut valve 1 and the ABS IN valve are open, the fluid pressure applied on the front RH brake ca liper is reduced by supplying the fluid pressure to
the master cylinder via the ABS IN valve and the cut valv e 1. The pressurization for the right caliper is con-
trolled separately from the left caliper.
Front LH brake caliper
• Since the suction valve 2 and the ABS OUT valve are closed and the cut valve 2 and the ABS IN valve are 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 valv e 2. The pressurization for the left caliper is con-
trolled separately from the right caliper.
Rear RH wheel cylinder• Since the suction valve 2 and the ABS OUT valve are closed and the cut valve 2 and the ABS IN valve are open, the fluid pressure applied on the rear RH wheel cylinder is reduced by supplying the fluid pressure to
the master cylinder via the ABS IN valve and the cut va lve 2. The pressurization for the right wheel cylinder
is controlled separately from the left wheel cylinder.
Rear LH wheel cylinder• Since the suction valve 1 and the ABS OUT valve are closed and the cut valve 1 and the ABS IN valve are open, the fluid pressure applied on the rear LH wheel cylinder is reduced by supplying the fluid pressure to
the master cylinder via the ABS IN valve and the cut valv e 1. The pressurization for the left wheel cylinder is
controlled separately from the right wheel cylinder.
Component Parts and Function
VALVE OPERATION (ABS AND EBD FUNCTIONS)
The control unit built into the ABS actuator and electric unit (control unit) controls fluid pressure of the brake
calipers by operating each valve.
Name Not activatedDuring 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 supp ly is not supplied (open)
ABS OUT valve Power supply is not supplie d (close) Power supply is not supplied (close)
Each brake caliper and each wheel cylinder
(fluid pressure) —
Pressure decreases
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.
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.
Pressure sensor Detects the brake fluid pressure and tr ansmits signal to ABS ac tuator and electric unit (control unit).
Revision: August 2015 2016 Versa Note

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BRC-16
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
Brake Pedal Applied or ABS Function
Operating (Pressure Increases)
Front RH brake caliper• When the cut valve 1 and the ABS IN valve opens, brake fluid is supplied to the front RH brake caliper from
the master cylinder through the ABS IN valve. Brake fl uid does not flow into the reservoir because the ABS
OUT valve is closed.
Front LH brake caliper• When the cut valve 2 and the ABS IN valve opens, brake fluid is supplied to the front LH brake caliper from the master cylinder through the ABS IN valve. Brake fl uid does not flow into the reservoir because the ABS
OUT valve is closed.
Rear RH wheel cylinder
• When the cut valve 2 and the ABS IN valve opens, brake fluid is supplied to the rear RH wheel cylinder from the master cylinder through the ABS IN valve. Brake fl uid does not flow into the reservoir because the ABS
OUT valve is closed.
Rear LH wheel cylinder
• When the cut valve 1 and the ABS IN valve opens, brake fl uid is supplied to the rear LH wheel cylinder from
the master cylinder through the ABS IN valve. Brake fl uid does not flow into the reservoir because the ABS
OUT valve is closed.
JSFIA0679GB
Name Not activatedDuring 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)
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 and each wheel cylinder
(fluid pressure) —
Pressure increases
Revision: August 2015 2016 Versa Note

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SYSTEMBRC-17
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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ABS Function Starts Oper
ating (Pressure Holds)
Front RH brake caliper• Since the ABS IN valve and the ABS OUT valve are closed, the front RH brake caliper, master cylinder, and
reservoir are blocked. This maintains fluid pressure applied on the front RH brake caliper.
Front LH brake caliper• Since the ABS IN valve and the ABS OUT valve are cl osed, the front LH brake caliper, master cylinder, and
reservoir are blocked. This maintains fluid pressure applied on the front LH brake caliper.
Rear RH wheel cylinder• Since the ABS IN valve and the ABS OUT valve are cl osed, the rear RH wheel cylinder, master cylinder, and
reservoir are blocked. This maintains fluid pressure applied on the rear RH wheel cylinder.
Rear LH wheel cylinder• Since the ABS IN valve and the ABS OUT valve are cl osed, the rear LH wheel cylinder, master cylinder, and
reservoir are blocked. This maintains fluid pressure applied on the rear LH wheel cylinder.
JSFIA0680GB
Name Not activatedDuring pressure holds
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) Po wer supply is supplied (close)
ABS OUT valve Power supply is not supplie d (close) Power supply is not supplied (close)
Each brake caliper and each wheel cylinder
(fluid pressure) —
Pressure holds
Revision: August 2015 2016 Versa Note

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