Honda Ridgeline. Manual — part 327
―――
―――
―――
―――
―――
―――
−
―――
―――
―――
+
−
+
−
+
−
−
Terminal
number
Wire
color
Terminal
sign
Description
Measurement (Disconnect the VSA
control unit 46P connector)
Terminal
Conditions
Voltage
19-45
26
WHT/
RED
FLP
Sends left-front
wheel speed
28
LT
GRN
FRP
Sends right-front
wheel speed
33
WHT
CAN-H
F-CAN
communication
circuit
40
GRN/
WHT
IG1
Power source for
activating the system
40
GND
Ignition switch ON (II)
Battery
voltage
41
RED
RL-GND
Detect left-rear wheel
sensor signal
42
BLU/
WHT
FL
B
Detect left-front
wheel sensor signal
43
BLK
GND2
Ground for the VSA
modulator-control
unit
43
GND
At all time
0.1 V or less
44
WHT/
RED
B SOL
Power source for the
valve relay
44
GND
At all time
Battery
voltage
45
WHT
B MOT
Power source for the
motor relay
45
GND
At all time
Battery
voltage
46
BLK
GND1
Ground for the pump
motor
46
GND
At all time
0.1 V or less
(cont’d)
*01
System Outline
19-46
VSA System Components
System Description (cont’d)
GAUGE CONTROL UNIT
YAW RATE-LATERAL
ACCELERATION
SENSOR
STEERING ANGLE
SENSOR
PCM
WHEEL SENSOR
VTM-4 CONTROL
UNIT
• VSA OFF switch signal
• Parking brake switch signal
• TPMS indicator signal
• Yaw rate signal
• Lateral acceleration signal
Steering angle signal
• Engine torque control request
• Shift control request
• Control mode signal
Indicators drive signal
• VSA control enable/disable
• Throttle open angle signal
• Engine revolution signal
• Gear position signal
• Brake pedal position switch signal
• Service check signal
Wheel rotation pulse signal
Wheel speed
signal
Tire low pressure
signal
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
BRAKE
PEDAL
POSITION
SWITCH
This system is composed of the VSA modulator-control unit, the wheel sensor, steering angle sensor, and yaw rate-
lateral acceleration sensor, and takes charge of the ABS, EBD, TCS, VSA, and brake assist control by controlling the
brake pressure of each wheel and the engine torque.
03
04
ABS Features
EBD Features
Grip force of tire and road surface
19-47
COEFFICIENT OF
FRICTION
TARGET SLIP RATE
ROTATIONAL
DIRECTION
RADIAL
DIRECTION
OF THE
ROTATIONAL
DIRECTION
SLIP RATE
REAR WHEEL BRAKE PRESSURE
With EBD under HEAVY LOAD
at REAR WHEEL
With EBD under LIGHT LOAD
at REAR WHEEL
Without EBD
FRONT WHEEL BRAKE PRESSURE
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. The ABS 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 speed, then it controls the brake
fluid pressure to reach the target slip rate.
The electronic brake distribution (EBD) helps control vehicle braking by adjusting the rear brake force in accordance
with rear wheel load before the ABS operates. Based on wheel sensor signals, the ABS control unit uses the
modulator to control the rear brakes individually. When the rear wheel speed is less than the front wheel speed, the
VSA modulator-control unit retains the current rear brake fluid pressure by closing the inlet valve in the modulator. As
the rear wheel speed increases and approaches the front wheel speed, the VSA modulator-control unit increases the
rear brake fluid pressure by momentarily opening the inlet valve. This whole process is repeated very rapidly. While
this is happening, there is kickback at the brake pedal.
(cont’d)
05
TCS Features
19-48
VSA System Components
System Description (cont’d)
ANTI-POWER of BRAKE FORCE
TOTAL TRACTION
DRIVING POWER
TOTAL TRACTION
BRAKE FORCE
SLIPPERY ROAD SURFACE
NORMAL ROAD SURFACE
When a drive wheel loses traction on a slippery road surface and starts to spin, the VSA modulator-control unit applies
brake pressure to the spinning wheel and sends an engine torque control request to the PCM to slow the spinning
wheel and keep traction.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст