Yamaha FJR 1300 AE 2014 Service Manual

FEATURES1-19ABS block diagramET3P61051ABS COMPONENT FUNCTIONSWheel sensors and wheel sensor rotorsWheel sensors “1” detect the wheel rotation speed and transmit the wheel rotation signal to the ABSECU.Each wheel sensor contains a Hall IC. The wheel sensors are installed in the sensor housing for eachwheel.Sensor rotors “2” are installed on the inner side of the front and rear wheel hubs and rotate with thewheels.The front and rear sensor rotors each have 84 magnetic poles (42 pairs) and are installed close to thewheel sensors. As the sensor rotor rotates, the Hall element in the Hall IC installed in the wheel sensorgenerates pulses. The pulse frequency, which is proportional to the magnetic flux density, is convertedinto a wave in the Hall IC so that it can be output.The ABS ECU calculates the wheel rotation speed by detecting the pulse frequency.1011123414 47 7 78 9914151617256 6131. Rear brake master cylinder2. Hydraulic unit assembly3. Front brake master cylinder4. Inlet solenoid valve5. ABS motor6. Hydraulic pump7. Outlet solenoid valve8. ABS ECU9. Buffer chamber10. Proportioning valve11. Rear brake caliper12. Rear wheel sensor13. Metering valve14. ABS warning light15. Left front brake caliper16. Front wheel sensor17. Right front brake caliper