2006 ACURA CSX sensor

(#'
)
DTCDetection Item ABS
Indicator Brake
System
Indicator VSA
Indicator VSA
Activation Indicator Note
19-100VSA System Components
DTC Troubleshooting Index
11 -13 Right-front Wheel Speed Sensor Circuit Malfunction ON ON/OFF ON ON (see page 19-117)
12 -11 Right-front Wheel Speed Sensor Electrical Noise or
Intermittent Interruption ON ON/OFF ON ON (see page 19-120)
-12 Right-front Wheel Speed Sensor Short to the Other Sensor Circuit ON ON/OFF ON ON (see page 19-121)
-21 Right-front Wheel Speed Sensor Installation Error ON ON/OFF ON ON (see page 19-123)
-22 Right-front Wheel Speed Sensor Installation Error (30 km/h (19 mph) or More) ON ON/OFF ON ON (see page 19-124)
-23 Right-front Wheel Speed Sensor Installation Error (0 to 15 km/h (0 to 9 mph)) ON ON/OFF ON ON (see page 19-124)
13 -13 Left-front Wheel Speed Sensor Circuit Malfunction ON ON/OFF ON ON (see page 19-117)
14 -11 Left-front Wheel Speed Sensor Electrical Noise or Intermittent Interruption ON ON/OFF ON ON (see page 19-120)
-12 Left-front Wheel Speed Sensor Short to the Other Sensor Circuit ON ON/OFF ON ON (see page 19-121)
-21 Left-front Wheel Speed Sensor Installation Error ON ON/OFF ON ON (see page 19-123)
-22 Left-front Wheel Speed Sensor Installation Error (30 km/h (19 mph) or More) ON ON/OFF ON ON (see page 19-124)
-23 Left-front Wheel Speed Sensor Installation Error (0 to 15 km/h (0 to 9 mph)) ON ON/OFF ON ON (see page 19-124)
15 -13 Right-rear Wheel Speed Sensor Circuit Malfunction ON ON/OFF ON ON (see page 19-117)
16 -11 Right-rear Wheel Speed Sensor Electrical Noise or Intermittent Interruption ON ON/OFF ON ON (see page 19-120)
-12 Right-rear Wheel Speed Sensor Short to the Other Sensor Circuit ON ON/OFF ON ON (see page 19-121)
-21 Right-rear Wheel Speed Sensor Installation Error ON ON/OFF ON ON (see page 19-123)
-22 Right-rear Wheel Speed Sensor Installation Error (30 km/h (19 mph) or More) ON ON/OFF ON ON (see page 19-124)
-23 Right-rear Wheel Speed Sensor Installation Error (0 to 15 km/h (0 to 9 mph)) ON ON/OFF ON ON (see page 19-124)
17 -13 Left-rear Wheel Speed Sensor Circuit Malfunction ON ON/OFF ON ON (see page 19-117)
18 -11 Left-rear Wheel Speed Sensor Electrical Noise or Intermittent Interruption ON ON/OFF ON ON (see page 19-120)
-12 Left-rear Wheel Speed Sensor Short to the Other Sensor Circuit ON ON/OFF ON ON (see page 19-121)
-21 Left-rear Wheel Speed Sensor Installation Error ON ON/OFF ON ON (see page 19-123)
-22 Left-rear Wheel Speed Sensor Installation Error (30 km/h (19 mph) or More) ON ON/OFF ON ON (see page 19-124)
-23 Left-rear Wheel Speed Sensor Installation Error (0 to 15 km/h (0 to 9 mph)) ON ON/OFF ON ON (see page 19-124)
21 -11 Right-front Magnetic Encoder (Wheel Bearing) Malfunction (Pulse Missing) ON ON/OFF ON ON (see page 19-125)
22 -11 Left-front Magnetic Encoder (Wheel Bearing) Malfunction (Pulse Missing) ON ON/OFF ON ON (see page 19-125)
23 -11 Right-rear Magnetic Encoder (Wheel Bearing) Malfunction (Pulse Missing) ON ON/OFF ON ON (see page 19-125)
24 -11 Left-rear Magnetic Encoder (Wheel Bearing) Malfunction (Pulse Missing) ON ON/OFF ON ON (see page 19-125)
1: Brake system indicator turns ON when two or more wheels fail.1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
08/08/21 15:04:51 61SNR030_190_0100
ProCarManuals.com
DYNOMITE -2009-

DTCDetection Item ABS
Indicator Brake
System
Indicator VSA
Indicator VSA
Activation Indicator Note
19-101
25 Yaw Rate Sensor Internal Circuit Malfunction
(Initial) OFF OFF ON ON (see page 19-126)
-12 Yaw Rate Sensor Internal Circuit Malfunction (Open, Short) OFF OFF ON ON (see page 19-126)
-13 Yaw Rate Sensor Communication Error OFF OFF ON ON (see page 19-126) Yaw Rate/Lateral Acceleration Sensor Circuit High
Voltage OFF OFF ON ON (see page 19-127)
Yaw Rate/Lateral Acceleration Sensor Circuit Low
Voltage OFF OFF ON ON (see page 19-127)
Yaw Rate/Lateral Acceleration Sensor Internal
Circuit Malfunction (Keep Alive Memory (KAM)
Error) OFF OFF ON ON (see page 19-126)
Yaw Rate/Lateral Acceleration Sensor Power
Source Voltage Malfunction OFF OFF ON ON (see page 19-127)
Yaw Rate/Lateral Acceleration Sensor Internal
Circuit Malfunction OFF OFF ON ON (see page 19-126)
Yaw Rate/Lateral Acceleration Sensor Startup Time
Malfunction OFF OFF ON ON (see page 19-127)
-21 Yaw Rate Sensor Neutral Position Malfunction OFF OFF ON ON (see page 19-126)
-22 Yaw Rate Sensor Stuck OFF OFF ON ON (see page 19-128)
-23 Yaw Rate Sensor Circuit Intermittent Interruption OFF OFF ON ON (see page 19-127)
-24 Yaw Rate Sensor Gain Low OFF OFF ON ON (see page 19-128)
-25 Yaw Rate Sensor Gain High OFF OFF ON ON (see page 19-128)
26 Lateral Acceleration Sensor Internal Circuit Malfunction (Initial) OFF OFF ON ON (see page 19-126)
-12 Lateral Acceleration Sensor Internal Circuit Malfunction (Open, Short) OFF OFF ON ON (see page 19-126)
-13 Lateral Acceleration Sensor Communication Error OFF OFF ON ON (see page 19-126)
-21 Lateral Acceleration Sensor Neutral Position Malfunction OFF OFF ON ON (see page 19-129)
-22 Lateral Acceleration Sensor Stuck OFF OFF ON ON (see page 19-129)
-23 Lateral Acceleration Sensor Circuit Intermittent Interruption OFF OFF ON ON (see page 19-129)
-24 Lateral Acceleration Sensor Gain Low OFF OFF ON ON (see page 19-128)
-25 Lateral Acceleration Sensor Gain High OFF OFF ON ON (see page 19-128)
27 -11 Steering Angle Sensor DIAG Signal Error (Initial) OFF OFF ON ON (see page 19-130) -21 Steering Angle Sensor Stuck Neutral Position OFF OFF ON ON (see page 19-132)
-22 Steering Angle Sensor Stuck Offset Position OFF OFF ON ON (see page 19-132)
-23 Steering Angle Sensor Counter Malfunction OFF OFF ON ON (see page 19-135)
-24 Steering Angle Sensor Exchange Malfunction OFF OFF ON ON (see page 19-135)
-26 Steering Angle Sensor DIAG Signal Error (Main) OFF OFF ON ON (see page 19-130)
31 -01 ABS Right-front Inlet Solenoid Valve Malfunction (Solenoid Initial Pulse) ON ON ON ON (see page 19-136)
-21 ABS Right-front Inlet Solenoid Valve Malfunction (Solenoid Pulse) ON ON ON ON (see page 19-136)
-22 ABS Right-front Inlet Solenoid Valve Malfunction (Solenoid Speculative) ON ON ON ON (see page 19-136)
-23 ABS Right-front Inlet Solenoid Valve Malfunction (Solenoid Stuck ON) ON ON ON ON (see page 19-136)
32 -01 ABS Right-front Outlet Solenoid Valve Malfunction (Solenoid Initial Pulse) ON ON ON ON (see page 19-136)
-21 ABS Right-front Outlet Solenoid Valve Malfunction (Solenoid Pulse) ON ON ON ON (see page 19-136)
-22 ABS Right-front Outlet Solenoid Valve Malfunction (Solenoid Speculative) ON ON ON ON (see page 19-136)
-23 ABS Right-front Outlet Solenoid Valve Malfunction (Solenoid Stuck ON) ON ON ON ON (see page 19-136)
2: ’07-08 models
3: ’09 model
(cont’d)-11
-14
-15
-16
-17
-18
-19
-112
2
2
2
3
3
3
2
08/08/21 15:04:51 61SNR030_190_0101
ProCarManuals.com
DYNOMITE -2009-

DTCDetection Item ABS
Indicator Brake
System
Indicator VSA
Indicator VSA
Activation Indicator Note
19-103
61 -01 VSA Modulator-control Unit Initial IG Low Voltage ON ON ON ON (see page 19-143)
-21 VSA Modulator-control Unit Power Source LowVoltage 1 ON ON ON ON (see page 19-143)
-22 VSA Modulator-control Unit Power Source Low Voltage 2 ON OFF ON ON (see page 19-143)
-23 VSA Modulator-control Unit Power Source Low Voltage 3 ON ON ON ON (see page 19-143)
62 -21 VSA Modulator-control Unit IG High Voltage ON ON ON ON (see page 19-144)
64 -11 Steering Angle Sensor Power Circuit Short OFF OFF ON ON (see page 19-144) -12 Steering Angle Sensor Power Circuit Open OFF OFF ON ON (see page 19-145)
65 -21 Brake Fluid Level Stuck ON OFF OFF ON ON (see page 19-147)
66 -11 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-148)
-12 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-148)
-13 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-148)
-14 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-148)
-15 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-149)
-16 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-148)
68 -21 Brake Pedal Position Switch Stuck OFF OFF OFF ON ON (see page 19-149) -22 Brake Pedal Position Switch Stuck ON OFF OFF ON ON (see page 19-151)
71 -21 Right-front or Left-rear Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-22 Left-front or Right-rear Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-23 Right-front and Right-rear Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-24 Left-front and Left-rear Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-25 Right-front and Left-front Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-26 Right-rear and Left-rear Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-27 Right-front or Left-rear Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
-28 Left-front or Right-rear Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
-29 Right-front and Right-rear Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
-2A Left-front and Left-rear Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
-2B Right-front and Left-front Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
-2C Right-rear and Left-rear Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
81 -01 ON ON ON ON (see page 19-153) -02 ON ON ON ON (see page 19-153)
-03 ON ON ON ON (see page 19-153)
-05 ON ON ON ON (see page 19-153)
-06 ON ON ON ON (see page 19-153)
-07 ON ON ON ON (see page 19-153)
-08 ON ON ON ON (see page 19-153)
-11 ON ON ON ON (see page 19-153)
-12 ON ON ON ON (see page 19-153)
-13 ON ON ON ON (see page 19-153)
-14 ON ON ON ON (see page 19-153)
-21 ON ON ON ON (see page 19-153)
-22 ON ON ON ON (see page 19-153)
-23 ON ON ON ON (see page 19-153)
(cont’d)
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
08/08/21 15:04:52 61SNR030_190_0103
ProCarManuals.com
DYNOMITE -2009-

DTCDetection Item ABS
Indicator Brake
System
Indicator VSA
Indicator VSA
Activation Indicator Note
19-104VSA System Components
DTC Troubleshooting Index (cont’d)
81 -31
ON ON ON ON (see page 19-153)
-32 ON ON ON ON (see page 19-153)
-33 ON ON ON ON (see page 19-153)
-35 ON ON ON ON (see page 19-153)
-36 ON ON ON ON (see page 19-153)
-37 ON ON ON ON (see page 19-153)
-38 ON ON ON ON (see page 19-153)
-39 ON ON ON ON (see page 19-153)
-3A ON ON ON ON (see page 19-153)
-3C ON ON ON ON (see page 19-153)
-3D ON ON ON ON (see page 19-155)
-3E ON ON ON ON (see page 19-155)
-40 ON ON ON ON (see page 19-153)
-41 ON ON ON ON (see page 19-153)
-42 ON ON ON ON (see page 19-153)
-51 ON ON ON ON (see page 19-154)
-52 ON ON ON ON (see page 19-153)
-53 ON ON ON ON (see page 19-154)
-54 ON ON ON ON (see page 19-153)
-55 ON ON ON ON (see page 19-154)
-56 ON ON ON ON (see page 19-153)
-57 ON ON ON ON (see page 19-154)
-58 ON ON ON ON (see page 19-153)
-59 ON ON ON ON (see page 19-155)
-61 ON ON ON ON (see page 19-153)
-71 ON OFF ON ON (see page 19-153)
-80 ON ON ON ON (see page 19-153)
83 -13 ECM/PCM Communication Error OFF OFF ON ON (see page 19-155)
-14 ECM/PCM Communication Error OFF OFF ON ON (see page 19-155)
84 -21 VSA Sensor Neutral Position Not Writing OFF OFF ON ON (see page 19-156)
86 -01 F-CAN Bus-off Malfunction OFF OFF ON ON (see page 19-156)
-11 F-CAN Communication with ECM/PCM Malfunction OFF OFF ON ON (see page 19-157)
-21 F-CAN Communication with Engine Malfunction OFF OFF ON ON (see page 19-157)
-22 F-CAN Communication with Engine Malfunction OFF OFF ON ON (see page 19-157)
-23 F-CAN Communication with Engine Malfunction OFF OFF ON ON (see page 19-157)
-24 F-CAN Communication with Engine Malfunction OFF OFF ON ON (see page 19-157)
-25 F-CAN Communication with Engine Malfunction OFF OFF ON ON (see page 19-157)
-31 F-CAN Communication with Gauge Control Module Malfunction OFF OFF ON ON (see page 19-159)
F-CAN Communication with EAT Malfunction OFF OFF ON ON (see page 19-157)
-71 F-CAN Communication with Yaw Rate-Lateral Acceleration Sensor Malfunction OFF OFF ON ON (see page 19-160)
107 -22 Central Processing Unit (CPU) Internal Circuit Malfunction OFF OFF OFF ON (see page 19-162)
108 -21 Steering Angle Sensor Malfunction OFF OFF OFF ON (see page 19-162)
112 -01 Central Processing Unit (CPU) Internal Circuit Malfunction ON ON ON ON (see page 19-163)
121 -01 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-02 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-11 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-21 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-24 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
122 -01 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-21 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-22 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-23 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
123 -01 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-02 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-11 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-21 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-24 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
124 -01 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-21 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-22 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-23 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
4: A/TCentral Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
-414
08/08/21 15:04:52 61SNR030_190_0104
ProCarManuals.com
DYNOMITE -2009-

•••
•••
´
´
´

(#'
)
VSA Modulator-Control Unit Inputs and Outputs for 37P Connector (Connector Disconnected)
TerminalnumberWire color Terminal sign Description Signal
19-106VSA System Components
System Description
NOTE: Standard battery voltage is about 12 V.
1 RED CAN-L F-CAN communication circuit
3 BLU STR-D Detects steering angle sensor signal
6 PNK FR-GND Detects right-front wheel speed sensor signal
7 ORN SVCC Power source for the steering angle sensor With ignition switch ON (II): about 5.0 V
8 PUR RL-GND Detects left-rear wheel speed sensor signal
9 LT GRN RR B Detects right-rear wheel speed sensor signal
10 BRN SGND Ground for the steering angle sensor
11 RED FL-GND Detects left-front wheel speed sensor signal
13 WHT FSR B Power source for the fail-safe relay Battery voltage at all times
14 RED MR B Power source for the motor relay Battery voltage at all times
Wire side of female terminals
08/08/21 15:04:53 61SNR030_190_0106
ProCarManuals.com
DYNOMITE -2009-

•••
´
´
´
•••
TerminalnumberWire color Terminal sign Description Signal
19-107
NOTE: Standard battery voltage is about 12 V.
15 WHT CAN-H F-CAN communication circuit
17 PUR STR-B Detects steering angle sensor signal
19 GRN FR B Detects right-front wheel speed sensor signal
20 YEL RL B Detects left-rear wheel speed sensor signal
21 BLU RR-GND Detects right-rear wheel speed sensor signal
22 WHT FL B Detects left-front wheel speed sensor signal
26 LT BLU K-LINE Communication with HDS
28 GRY IG1 Power source for activating the system With ignition switch ON (II): about battery
voltage
34 GRN STR-A Detects steering angle sensor signal
36 BLK GND Ground for the VSA modulator- control unit Continuity to ground
37 BLK MR-GND Ground for the pump motor Continuity to ground
(cont’d)
08/08/21 15:04:53 61SNR030_190_0107
ProCarManuals.com
DYNOMITE -2009-

Î
System Outline
19-108VSA System Components
System Description (cont’d)
CONTROL UNIT
MODULATOR UNIT VSA MODULATOR-
CONTROL UNIT
Brake pressure
signal
 Solenoid control
 Motor control
Communication via F-CAN
VSA
OFF
SWITCH
PARKING
BRAKE
SWITCH BRAKE
FLUID
LEVEL
SWITCH
WHEEL SPEED SENSOR
 Engine torque control request
 Control mode signal
 VSA control enable/disable
 Throttle open angle signal
 Engine revolution signal
 Brake pedal
position switch signal
 Service check signal
 Gear position signal
Wheel rotation
pulse signal
ECM/PCM
BRAKE
PEDAL
POSITION
SWITCH
GAUGE CONTROL MODULE (TACH)
YAW RATE-LATERAL
ACCELERATION
SENSORSTEERING ANGLE
SENSOR
VSAOFFswitchsignal
 Parking brake switch signal
 Brake fluid level switch signal
 Yaw rate signal
 Lateral acceleration signal Steering angle signal
 Indicator drive signal
 Buzzer request signal*
*: ’09 model
This system is composed of the VSA modulator-control unit, the wheel speed sensors, the steering angle sensor, the
yaw rate-lateral acceleration sensor, and the system indicators in the gauge control module (tach). The VSA
modulator-control unit controls the ABS, EBD, TCS, VSA, and brake assist with the brake pressure of each wheel and
reduces engine torque.
08/08/21 15:04:53 61SNR030_190_0108
ProCarManuals.com
DYNOMITE -2009-



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-