Abs Component Functions - Yamaha FJR1300A Service Manual

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ABS block diagram
1. Rear brake master cylinder
2. Hydraulic unit
3. Front brake master cylinder
4. ABS motor
5. Hydraulic pump
6. Buffer chamber
7. Hydraulic control valve
8. Proportioning valve
9. Rear brake caliper
ET3P61051

ABS COMPONENT FUNCTIONS

Wheel sensors and wheel sensor rotors
Wheel sensors "1" detect the wheel speed and transmit the rotation signal to the ABS ECU.
Each wheel sensor is composed of a permanent magnet and a coil. The wheel sensors are installed in
the sensor housing for each wheel. Sensor rotors "2" are pressed in the inner side of the front and rear
wheel hubs and rotate with the wheels. The wheel sensor rotors have 42 serrations inside and are in-
stalled close to the wheel sensors. As the distance changes between the top and bottom of the serra-
tions with the rotation of the wheels, inductive electromotive force is generated in the wheel sensors.
Wheel speed is detected based on the frequency of this alternating voltage.
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7 7
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16
10. Rear wheel sensor
11. Metering valve
12. ABS ECU
13. Left front brake caliper
14. Front wheel sensor
15. Right front brake caliper
16. ABS warning light
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1-10
FEATURES
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6
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