Yamaha FJR13AY 2009 Service Manual page 23

• ABS ECU
The ABS ECU is integrated with the hydraulic unit to achieve a compact and lightweight design.
As shown in the block following diagram, the ABS ECU receives wheel sensor signals from the front
and rear wheels and also receives signals from other monitor circuits.
8
7
4 5
6
2
3
1
10
33
11
31
32
30
29
28
27
1. Battery
2. AC magneto
3. Rectifier/regulator
4. Main fuse
5. Main switch
6. ABS ECU fuse
7. ABS motor fuse
8. ABS solenoid fuse
9. Front brake light switch
10. Brake light relay
11. Tail/brake light
12. Rear brake light switch
13. Hydraulic unit assembly
14. ABS ECU
15. Solenoid relay
16. ABS motor relay
17. Front brake inlet solenoid
18. Front brake outlet solenoid
The necessary actions are confirmed using the monitor circuit and control signals are transmitted to
the hydraulic unit assembly.
ABS control operation
The ABS control operation performed in the ABS ECU is divided into the following two parts.
• Hydraulic control
• Self-diagnosis
When a malfunction is detected in the ABS, a fault code is stored in the memory of the ABS ECU for
easy problem identification and troubleshooting.
13
9
12
14
15 16
17 18
19 20 21 22
19. Rear brake inlet solenoid
20. Rear brake outlet solenoid
21. Unified brake system inlet solenoid
22. Unified brake system outlet solenoid
23. ABS motor
24. Meter assembly
25. ABS warning light
26. Speedometer
27. ABS test coupler
28. Rear wheel sensor
29. Front wheel sensor
30. Start switch
31. Starting circuit cut-off relay
32. Starter motor
33. Starter relay
34. MCU (motor control unit) (FJR13AE only)
35. ECU (engine control unit)
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FEATURES
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24
25
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