2014 NISSAN TEANA ABS

SYSTEMBRC-13
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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VALVE OPERATION (VDC AND TCS FUNCTIONS)
The control unit built in the ABS actuator and electric unit (control unit) controls fluid pressure of the brake cal-
ipers by operating each valve.
VDC and TCS Functions are Operating (Pressure Increases)
Component Signal description
Steering angle sensor Transmits the steering an
gle sensor signal to ABS actuator an d electric unit (control unit) via
CAN communication.
ECM Transmits the following signals to ABS actuator and electric unit (control unit) via CAN commu-
nication.
• Accelerator pedal position signal
• Engine speed signal
• Target throttle position signal
TCM Transmits the current gear positi
on signal to ABS actuator and electric unit (control unit) via
CAN communication.
Combination meter Transmits the following signals to ABS actuator and electric unit (control unit) via CAN commu-
nication.
• Brake fluid level switch signal
• Parking brake switch signal
Receives the foll owing signals from ABS actuator and elec tric unit (control unit) via CAN com-
munication.
• ABS warning lamp signal
• Brake warning lamp signal
• VDC OFF indicator lamp signal
• SLIP indicator lamp signal
ALFIA0309GB
Name Not activated 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 supp ly is not supplied (open) Power supp ly is not supplied (open)
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

BRC-14
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
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 s upplied 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.
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 supp lied 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 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 s upplied 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.
Rear LH 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 suppl ied to the rear 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.
VDC and TCS Functions Start Operating (Pressure Holds)
ABS OUT valve Power supply is not supplied (close) Power supply is not supplied (close)
Each brake caliper (fluid pressure) — Pressure increases Name Not activated Pressure increases
ALFIA0310GB
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)
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

SYSTEMBRC-15
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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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 clos ed, the front LH brake caliper, master cylinder, and res-
ervoir are blocked. This maintains fluid pressure app lied on the front LH brake caliper. The pressurization for
the right caliper is controlled separately from the left caliper.
Rear RH brake caliper
• Since the cut valve 2 and the suction valve 2 are clos ed, 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.
Rear LH brake caliper• Since the cut valve 1 and the suction valve 1 are closed, the rear LH brake caliper, master cylinder, and res- ervoir are blocked. This maintains fluid pressure app lied on the rear LH brake caliper. The pressurization for
the right caliper is controlled separately from the left caliper.
VDC and TCS Functions Operating (Pressure Decreases)
Suction valve 2 Power supply is not supplied (close) Power supply is not supplied (close)
ABS IN valve Power supp ly is not supplied (open) Power supp ly is not supplied (open)
ABS OUT valve Power supp ly is not supplied (close) Power supply is not supplied (close)
Each brake caliper (fluid pressure) — Pressure holds Name Not activated Pressure holds
ALFIA0311GB
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)
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

BRC-16
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
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 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 rear 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 2. The pressurization for the right caliper is con-
trolled separately from the left caliper.
Rear LH 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 rear LH brake cali per is reduced by supplying the fluid pressure to the
master cylinder via the ABS IN valve and the cut valve 1. The pressurization for the left caliper is controlled
separately from the right caliper.
Component Parts and Function
VALVE OPERATION (ABS AND EBD FUNCTIONS)
The control unit built into the ABS act uator and electric unit (control unit) controls fluid pressure of the brake
calipers by operating each valve.
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 Name Not activated During pressure decreases
Component Function
Pump Returns the brake fluid reserved in reservoir to master cylinder by reducing pressure.
Motor Activates the pu mp according to signals from ABS actuator and el ectric 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 li ne to increase, hold or decrease according to si gnals from control unit.
Return check valve Returns the brake fluid from brake caliper 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.
Pressure sensor Detects the brak e fluid pressure and transmits signal to ABS actuator and electric unit (control unit).
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

SYSTEMBRC-17
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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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 fluid 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 fl uid is supplied to the front LH brake caliper from
the master cylinder through the ABS IN valve. Brake fluid does not flow into the reservoir because the ABS
OUT valve is closed.
Rear RH brake caliper• When the cut valve 2 and the ABS IN valve opens, brake fluid is supplied to the rear RH brake caliper from the master cylinder through the ABS IN valve. Brake fluid does not flow into the reservoir because the ABS
OUT valve is closed.
Rear LH brake caliper
• When the cut valve 1 and the ABS IN valve opens, brake fl uid is supplied to the rear LH brake caliper from
the master cylinder through the ABS IN valve. Brake fluid does not flow into the reservoir because the ABS
OUT valve is closed.
ALFIA0312GB
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)
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 supp ly is not supplied (open) Power supp ly is not supplied (open)
ABS OUT valve Power supp ly is not supplied (close) Power supply is not supplied (close)
Each brake caliper (fluid pressure) — Pressure increases
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

BRC-18
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
ABS Function Starts Operating (Pressure Holds)
Front RH brake caliper
• Since the ABS IN valve and the ABS OUT valve are cl
osed, 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 brake caliper
• Since the ABS IN valve and the ABS OUT valve are cl osed, the rear RH brake caliper, master cylinder, and
reservoir are blocked. This maintains fluid pressure applied on the rear RH brake caliper.
Rear LH brake caliper
• Since the ABS IN valve and the ABS OUT valve are cl osed, the rear LH brake caliper, master cylinder, and
reservoir are blocked. This maintains fluid pressure applied on the rear LH brake caliper.
ALFIA0313GB
Name Not activated During 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) Power supply is supplied (close)
ABS OUT valve Power supply is not supplied (close) Power supply is not supplied (close)
Each brake caliper (fluid pressure) — Pressure holds
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

SYSTEMBRC-19
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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ABS Function Operating
(Pressure Decreases)
Front RH brake caliper
• Since the ABS IN valve is closed and the ABS OUT valve is opened, fluid pressure applied on the front RH
brake caliper is supplied to the reservoir through the ABS OUT valve. This fluid pressure decreases when
sent to the master cylinder by the pump.
Front LH brake caliper• Since the ABS IN valve is closed and the ABS OUT valve is opened, fluid pressure applied on the front LH
brake caliper is supplied to the reservoir through the ABS OUT valve. This fluid pressure decreases when
sent to the master cylinder by the pump.
Rear RH brake caliper• Since the ABS IN valve is closed and the ABS OUT valve is opened, fluid pressure applied on the rear RH
brake caliper is supplied to the reservoir through the ABS OUT valve. This fluid pressure decreases when
sent to the master cylinder by the pump.
Rear LH brake caliper
• Since the ABS IN valve is closed and the ABS OUT valve is opened, fluid pressure applied on the rear LH
brake caliper is supplied to the reservoir through the ABS OUT valve. This fluid pressure decreases when
sent to the master cylinder by the pump.
ALFIA0314GB
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 supp ly is not supplied (open) Power supply is supplied (close)
ABS OUT valve Power supp ly is not supplied (close) Power supp ly is supplied (open)
Each brake caliper (fluid pressure) — Pressure decreases
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

BRC-20
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
ABS Function Operating
(Pressure Increases)
Front RH brake caliper
• Brake fluid is supplied to the front RH brake caliper from the master cylinder through the cut valve 1 and the
ABS IN valve. Since the suction valve 1 and the ABS OU T valve is closed, the fluid does not flow into the
reservoir. The amount of brake fluid supplied to the fr ont RH brake caliper from the master cylinder is con-
trolled according to time that the ABS IN valve is not energized (time that the ABS IN valve is open).
Front LH brake caliper• Brake fluid is supplied to the front LH brake caliper from the master cylinder through the cut valve 2 and the
ABS IN valve. Since the suction valve 2 and the ABS OU T valve is closed, the fluid does not flow into the
reservoir. The amount of brake fluid supplied to the fr ont LH brake caliper from the master cylinder is con-
trolled according to time that the ABS IN valve is not energized (time that the ABS IN valve is open).
Rear RH brake caliper• Brake fluid is supplied to the rear RH brake caliper from the master cylinder through the cut valve 2 and the
ABS IN valve. Since the suction valve 2 and the ABS OU T valve is closed, the fluid does not flow into the
reservoir. The amount of brake fluid supplied to the r ear RH brake caliper from the master cylinder is con-
trolled according to time that the ABS IN valve is not energized (time that the ABS IN valve is open).
Rear LH brake caliper
• Brake fluid is supplied to the rear LH brake caliper from the master cylinder through the cut valve 1 and the
ABS IN valve. Since the suction valve 1 and the ABS OU T valve is closed, the fluid does not flow into the
ALFIA0312GB
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)
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 increases
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM