Acura RSX Honda Integra. Manual - part 360

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０１

Ｓ６Ｍ６Ａ０６Ｄ１０６００００００００ＣＡＡＴ１０

ABS Modulator-Control Unit Inputs and Outputs for 25P Connector

Terminal

number

Terminal sign

(Terminal

name)

Terminals

Wire

color

Description

Measurement (Disconnect the ABS modulator-control

unit connector)

Conditions

Voltage

19-37

System Description

2

BLU

FRS (

)

(Front-right

sensor

negative)

Detects right-front
wheel sensor signal

2

18

Wheel

Spin wheel
at 1 turn/second

AC: 0.053 V or
above
Reference
Oscilloscope
0.15 V peak-to-
peak or above

3

BLU/

ORN

FLS (

)

(Front-left

sensor

positive)

Detects left-front
wheel sensor signal

3

12

4

WHT/

BLK

STOP

Detects brake switch
signal

4

GND

Brake pedal

Pressed

Battery
Voltage

Released

Below 0.3 V

5

YEL/

RED

RLS (

)

(Rear-left

sensor

positive)

Detects left-rear
wheel sensor signal

5

14

Wheel

Spin wheel
at 1 turn/second

AC: 0.053 V or
above
Reference
Oscilloscope
0.15 V peak-to-
peak or above

6

BLU/

YEL

RRS (

)

(Rear-right

sensor

negative)

Detects right-rear
wheel sensor signal

6

15

7

BLU/

RED

WALP

(Warning

lamp)

Drives ABS indicator

7

GND

ABS indicator
(Ignition switch ON
(II))

ON

About 6 V

OFF

Below 0.3 V

8

WHT/

GRN

FSR

B

(ABS fail-

safe relay

battery)

Power source for the
ABS fail-safe relay

8

GND

Every time

Battery
Voltage

9

WHT/

RED

MR

B

(Motor relay

battery)

Power source for the
motor relay

9

GND

Every time

Battery
Voltage

10

GRY

DLC

(Data link

connector)

Communicates with
the HDS

(cont’d)

Wire side of female terminals

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ABS Modulator-Control Unit Inputs and Outputs for 25P Connector (cont’d)

Terminal

number

Terminal sign

(Terminal

name)

Terminals

Wire

color

Description

Measurement (Disconnect the ABS modulator-control

unit connector)

Conditions

Voltage

19-38

ABS Components

System Description (cont’d)

12

BRN/

WHT

FLS (

)

(Front-left

sensor

negative)

Detects left-front
wheel sensor signal

12

3

Wheel

Spin wheel
at 1 turn/second

AC: 0.053 V or
above
Reference
Oscilloscope
0.15 V peak-to-
peak or above

13

BRN

SCS

(Service

check

signal)

Detects service check
connector signal
(DTC indication or
DTC clearing)

14

GRY/

RED

RLS (

)

(Rear-left

sensor

negative)

Detects left-rear
wheel sensor signal

14

5

Wheel

Spin wheel
at 1 turn/second

AC: 0.053 V or
above
Reference
Oscilloscope
0.15 V peak-to-
peak or above

15

GRN/

YEL

RRS (

)

(Rear-right

sensor

positive)

Detects right-rear
wheel sensor signal

15

6

16

BLK/
ORN

IG2

(Ignition 2)

Power source for
activating the system

16

GND

Ignition switch ON (II)

Battery
Voltage

18

GRN/

BLK

FRS (

)

(Front-right

sensor

positive)

Detects right-front
wheel sensor signal

18

2

Wheel

Spin wheel
at 1 turn/second

AC: 0.053 V or
above
Reference
Oscilloscope
0.15 V peak-to-
peak or above

24

BLK

GND1

(Ground 1)

Ground

25

BLK

GND2

(Ground 2)

Ground

Wire side of female terminals

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０１

Features

Grip Force of Tire and Road Surface

19-39

COEFFICIENT OF
FRICTION

TARGET SLIP RATE

ROTATIONAL
DIRECTION

RADIAL
DIRECTION
OF THE
ROTATIONAL
DIRECTION

SLIP RATE

When the brake pedal is pressed during driving, the wheels can lock before the vehicle comes to a stop. In such an
event, the maneuverability of the vehicle is reduced if the front wheels are locked, and the stability of the vehicle is
reduced if the rear wheels are locked, creating an extremely unstable condition. The ABS precisely controls the slip
rate of the wheels to ensure maximum grip force from the tires, thereby ensuring the maneuverability and stability of
the vehicle.
The ABS calculates the slip rate of the wheels based on the vehicle speed and the wheel speed, then it controls the
brake fluid pressure to reach the target slip rate.

(cont’d)

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０２

COMPONENTS

MAIN FUNCTION

19-40

ABS Components

System Description (cont’d)

SOLENOID VALVE
CONTROL

WHEEL
SENSOR
SIGNAL

SOLENOID VALVE
CONTROL

WHEEL
SENSOR
SIGNAL

WHEEL
SENSOR

RL

NO: Normally Open
NC: Normally Closed

WHEEL
SENSOR
SIGNAL

WHEEL
SENSOR

RR

ABS
CONTROL
UNIT

MASTER CYLINDER

NO

NO

NC

PUMP

MOTOR

PUMP

P

M

P

RESERVOIR

NC

NC

WHEEL
SENSOR

FL

WHEEL
SENSOR

FR

NC

NO

NO

RESERVOIR

MODULATOR
UNIT

ABS MODULATOR-
CONTROL UNIT

PROPORTIONING
CONTROL VALVE

WHEEL
SENSOR
SIGNAL

Wheel sensor

The wheel sensor outputs the speed signal to the ABS control unit
according to the pulser’s rotation speed.

ABS modulator-control
unit

ABS control unit

The ABS control unit processes the signal from the wheel sensor,
then outputs the ABS control signal to the modulator unit.

Modulator unit

The modulator unit receives the control signal, then controls brake
fluid pressure for each wheel.

Motor relay (inside of the ABS control unit)

The motor relay drives the ABS pump motor.

ABS fail-safe relay (inside of the ABS
control unit)

The ABS fail-safe relay cuts the power to the solenoid valve when
the problem is detected.

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