Yamaha Vmax VMX17C 2009 Service Manual page 22

• 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
10
1
30
11
28
29
27
26
25
24
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. Rear brake light switch
11. Tail/brake light
12. Hydraulic unit assembly
13. ABS ECU
14. Solenoid relay
15. ABS motor relay
16. Front brake inlet 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.
12
9
13
1-13
14 15
16 17 18 19
20
17. Front brake outlet solenoid
18. Rear brake inlet solenoid
19. Rear brake outlet solenoid
20. ABS motor
21. Meter assembly 1
22. ABS warning light
23. Speedometer
24. ABS test coupler
25. Rear wheel sensor
26. Front wheel sensor
27. Start switch
28. Starting circuit cut-off relay
29. Starter motor
30. Starter relay
31. ECU (engine control unit)
FEATURES
31
21
22
23