Yamaha FJR1300A(X), Service Manual, Page: 23 / 754

FEATURES
1-14
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.
NOTE:
• Some types of malfunctions are not recorded in the memory of the ABS ECU (e.g., a blown ABS ECU
fuse).
• The ABS performs a self-diagnosis test for a few seconds each time the vehicle first starts off after the
main switch was turned on. During this test, a “clicking” noise can be heard from under the seat, and
if the brake lever or brake pedal are even slightly applied, a vibration can be felt at the lever and pedal,
but these do not indicate a malfunction.
29. Front wheel sensor
30. Start switch
31. Starting circuit cut-off relay
32. Starter motor
33. Starter relay
34. MCU (motor control unit) (FJR1300AS only)
35. ECU (engine control unit)
2
1
3
4
5
6
7
8
1. Software operation flow
2. Main switch “ON”
3. Initialize
4. Self-diagnosis (when static)
5. Self-diagnosis (when riding)
6. Receive signals
7. Control operation
8. Depressurize/pressurize