Total System Block Diagram; Composition Of Parts - Yamaha YP250A 1999 Supplementary Service Manual

TOTAL SYSTEM BLOCK DIAGRAM

Rear master cylinder
1
Hydraulic unit
2
Silencer chamber
3
Hydraulic pump
4
Electric motor
5
Buffer chamber
6
Hydraulic control valve
7

COMPOSITION OF PARTS

Component
Wheel sensor
ABS warning light
Fail-safe relay
Hydraulic unit (HU)
Electronic control unit (ECU)
ABS OUTLINE
Front master cylinder
8
Rear brake caliper
9
Front brake caliper
10
Electronic control unit
11
Rear wheel sensor
12
Front wheel sensor
13
ABS warning light
14
Detects each wheel rotation pulse of front and rear wheels
and inputs them to the electronic control unit.
Warns the ABS system failure to the rider.
Supplies the power to the solenoid valve and motor of hy-
draulic unit.
Controls the brake fluid pressure of front and rear wheels ac-
cording to the output signal sent from the electronic control
unit.
S Outputs the operation signal to the hydraulic unit so that the
unit controls matching the road conditions according to the
wheel rotation pulses transmitted from front and rear wheel
sensors.
S In case of ABS system failure, the unit activates the ABS
warning light and shuts off the power to hydraulic unit and
deactivates the ABS operation.
4
GEN
INFO
Function