Nissan Altima HL32 Hybrid. Manual — part 114
ABS
BRC-21
< FUNCTION DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
Component Parts Location
INFOID:0000000004469725
![](/vehicles/gon/sttello/nita/ckintal.png)
BRC-22
< FUNCTION DIAGNOSIS >
[VDC/TCS/ABS]
ABS
ALFIA0001ZZ
![](/vehicles/gon/sttello/nita/ale.png)
ABS
BRC-23
< FUNCTION DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
Component Description
INFOID:0000000004212620
1.
ABS relay No.1
2.
ABS motor relay No.1
3.
ABS motor relay No.2
4.
ABS relay No.2
5.
Brake ECU
6.
Front RH wheel sensor
7.
Front LH wheel sensor
8.
Brake actuator
9.
Brake simulator
10. Brake warning buzzer
11. Brake stroke sensor
12. VDC warning lamp
13. SLIP indicator lamp
14. ABS warning lamp (For US)
15. ABS warning lamp (For CANADA)
16. Brake warning lamp (For US)
17. Brake warning lamp (For CANADA) 18. Electronically Controlled Brake
warning lamp
19. Steering angle sensor
20. Yaw rate/side/decel G sensor
21. Rear RH wheel sensor
22. Rear LH wheel sensor
23. Brake capacitor
A.
Engine room right side
B.
Engine room right side
C.
Steering knuckle (RH)
D.
Steering knuckle (LH)
E.
Engine room right side
F.
Engine room left side
G.
Cluster lid C
H.
Instrument driver panel lower
I.
Combination meter
J.
Spiral cable assembly
K.
Center Console
L.
Rear knuckle (RH)
M.
Rear knuckle
N.
Trunk room right side
AWFIA0495ZZ
![](/vehicles/gon/sttello/nita/whelor.png)
BRC-24
< FUNCTION DIAGNOSIS >
[VDC/TCS/ABS]
ABS
Components
Functions
Brake ECU
Processes the signals from each sensor to perform brake control for ABS, TCS, and VDC.
In addition, it communicates with the HV control ECU to output a control signal.
ABS main relay
(ABS relay No.1, 2)
Controlled by the brake ECU. In addition to supplying power to each solenoid, it supplies
power to the brake ECU.
ABS motor relay
(ABS motor relay No.1, 2)
Controlled by the brake ECU. Supplies power to the pump motor.
Wheel sensor
Detects the wheel speed and inputs the results to the brake ECU.
Stop lamp switch
Detects the brake operating conditions and inputs the result to the brake ECU. It supplies
power to the brake ECU.
Brake stroke sensor
Detects the brake pedal stroke volume and inputs the result to the brake ECU.
Brake capacitor
Provides the system with a supplementary power supply by discharging the electric charge
of the brake capacitor. It happens when an electric charge is accumulator in the brake capac-
itor in the unit and the vehicle power voltage (12 V) is reduced.
Brake warning buzzer
Sounds continuously to warm the driver of a reduction in accumulator hydraulic pressure in
the brake actuator, an abnormality in the power supply system, or a reduction in the vehicle
power voltage (12 V).
HV ECU
Controls the engine output during the operation of TCS and VDC by communicating with the
brake ECU.
Yaw rate/side/decel G sensor
Detects the yaw rate (axial rotation) and the forward and lateral acceleration, and inputs the
results to the brake ECU.
Steering angle sensor
Detects the steering angle and direction, and outputs the results to the brake ECU through
CAN communication.
Master cylinder
Generates pressure in accordance with the force of the brake operation.
Brake fluid reservoir
Stores brake fluid for the master cylinder system and power supply system.
Brake fluid level switch
Detects a reduction in the level of the brake fluid in the reservoir.
Brake simulator
Generates a natural pedal stroke in accordance with the pedal force of the driver during sys-
tem control.
Brake actuator
Controls the hydraulic pressure of each of the four wheel cylinders using the output signal of
the brake ECU.
Pump motor
Pumps up the brake fluid from the reservoir and supplies the accumulator with high hydraulic
pressure.
Accumulator
Accumulators for the hydraulic pressure that was generated by the pump.
Accumulator pressure sensor (PACC)
Built into the brake actuator to detect the accumulator hydraulic pressure.
Relief valve
Prevents excessive high pressure in the power supply system. It relieves the system by
sending brake fluid to the reservoir when the pump has operated continuously, for example,
during an accumulator hydraulic pressure sensor malfunction.
Master cylinder pressure sensor
(PMC1, PMC2)
Built into the brake actuator to detect the pressure of the master cylinder and input the results
to the brake ECU.
Wheel cylinder pressure sensor
(PFR, PFL, PRR, PRL)
Built into the brake actuator to detect the brake hydraulic pressure of each wheel cylinder.
Switching solenoid valve
(SMC1, SMC2)
Circuits from a master cylinder to a wheel cylinder are interrupted.
Linear solenoid valve
(SLA##, SLR##)
Controls the wheel cylinder hydraulic pressure during normal brake operation, ABS, TCS,
and VDC control. SLA## are solenoids for controlling pressure increases, while SLR## are
solenoids for controlling pressure decreases.
ABS warning lamp
Comes on to inform the driver that a malfunction in the ABS have occurred.
Brake warning lamp
• When a malfunction occurs in the oil pressure system.
• When EBD is not controlled.
Electronically Controlled Brake warning
lamp
Comes on to inform the driver that a malfunction in the Electronically Controlled Brake or de-
generative brake has occurred.
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