2006 ACURA CSX Service Repair Manual

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Page 1601 of 2893

ACURA CSX 2006 Service Repair Manual

ABS Features
Anti-lock control
Grip force of tire and road surface
Main Control
19-109
COEFFICIENT OF
FRICTIONTARGET SLIP RATE
ROTATIONAL
DIRECTION
RADIAL
DIRECTION
OF THE
ROTATIONAL
DIRECTI

ABS Features
Anti-lock control
Grip force of tire and road surface
Main Control
19-109
COEFFICIENT OF
FRICTIONTARGET SLIP RATE
ROTATIONAL
DIRECTION
RADIAL
DIRECTION
OF THE
ROTATIONAL
DIRECTION
SLIP RATE
LEFT-REAR
WHEEL SPEED
SENSOR RIGHT-REAR
WHEEL SPEED
SENSOR
LEFT-FRONT
WHEEL SPEED
SENSOR RIGHT-FRONT
WHEEL SPEED
SENSOR Select Low
Speed Wheel
Detect
Vehicle Speed
Drive
SolenoidRIGHT-REAR
SOLENOID
LEFT-REAR
SOLENOID
RIGHT-FRONT
SOLENOID
LEFT-FRONT
SOLENOID
CONTROL UNIT
ABS
Control
Reference
Slip Rate
Drive
Solenoid
ABS
Control
Drive
Solenoid
ABS
Control
Drive
Solenoid
ABS
Control
RIGHT-FRONT
LEFT-FRONT
Detect
Wheel Speed
Detect
Slip Rate
RIGHT-REAR
LEFT-REAR Detect
Slip Rate
Detect
Slip Rate
Detect
Slip Rate
Detect
Wheel Speed
Detect
Wheel Speed
Detect
Wheel Speed
Without ABS, when the brake pedal is pressed while driving, the wheels sometimes 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. With ABS, the system
precisely controls the slip rate of the wheels to ensure maximum grip force from the tires, and it thereby ensures
maneuverability and stability of the vehicle. The ABS calculates the slip rate of the wheels based on the four wheel
speeds, and then it controls the brake fluid pressure to reach the target slip rate.
The control unit detects the wheel speed based on the wheel speed sensor signals it receives, then it calculates the
vehicle speed based on the detected wheel speed. The control unit detects the vehicle speed during deceleration
based on the wheel speeds.
The control unit calculates the slip rate of each wheel, and transmits the control signal to the modulator unit solenoid
valve when the slip rate is high.
The hydraulic control has three modes: Pressure intensifying, pressure reducing, and pressure retaining.
(cont’d)
08/08/21 15:04:53 61SNR030_190_0109
ProCarManuals.com
DYNOMITE -2009-

Page 1602 of 2893

ACURA CSX 2006 Service Repair Manual

EBD Features
TCS Features
19-110VSA System Components
System Description (cont’d)
REAR WHEEL
BRAKE PRESSURE
With EBD under HEAVY LOAD
at REAR WHEELS
With EBD under LIGHT LOAD
at REAR WHEEL

Page 1603 of 2893

ACURA CSX 2006 Service Repair Manual

VSA System Features
Oversteer control
Understeer control
19-111
with VSAwithout VSA The brake makes the yaw rate opposite
to the turning direction
with VSA
without VSA
The brake increases th

Page 1604 of 2893

ACURA CSX 2006 Service Repair Manual
Brake Assist Features
19-112VSA System Components
System Description (cont’d)
Pressure
Threshold
Brake Assist
Begins
Time
Threshold Brake Pedal
Effort Reduced
PanicStopwithBrakeAssist
Time
Pres

Page 1605 of 2893

ACURA CSX 2006 Service Repair Manual

Modulator Unit
Mode VSA NOValveVSA NC
Valve Inlet
Solenoid Valve Outlet
Solenoid Valve Brake Fluid
Pressure
intensifying
mode
Pressure
retaining
mode
Pressure
reducing
mode
Pressure
adding
mode
1

Page 1606 of 2893

ACURA CSX 2006 Service Repair Manual Î(#
)
´ ´
19-114VSA System Components
Circuit Diagram
UNDER-DASH
FUSE/RELAY BOX
No. 4 (7.5 A)
IGNITION SWITCH
IG1 HOT in ON (II) and START (III)

Page 1607 of 2893

ACURA CSX 2006 Service Repair Manual Î
´´
´
´ ´
´
´
19-115
VSA MODULATOR-CONTROL UNIT
CONTROL UNIT
5V
REGULATOR MODULATOR UNIT
VSA1
VSA2
LEFT-FRONT
RIGHT-FRONT LEFT-REAR
RIGHT-REAR
PUMP MOTOR
G202 PRESSURE
SENSOR
SOLE

Page 1608 of 2893

ACURA CSX 2006 Service Repair Manual
19-116VSA System Components
Circuit Diagram (cont’d)
BRAKE PEDAL POSITION
SWITCH 4P CONNECTOR
PARKING BRAKE SWITCH
1P CONNECTOR
DATA LINK CONNECTOR (DLC) VSA OFF SWITCH
5P CONNECTOR
YAW RATE-LA

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