Yamaha R1 Series 2015 Service Manual page 618

Fault code
No.
90 CAN communication
(between FI ECU and
hydraulic unit assembly)
91 CAN communication
(between IMU and hydraulic
unit assembly)
* The fault code number varies according to the vehicle conditions.
Fault code No. 11
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Foreign material adhered around the front
wheel sensor
2 Incorrect installation of the front wheel
3 Defective sensor rotor or incorrect instal-
lation of the rotor
4 Defective front wheel sensor or incorrect
installation of the sensor
TIP
If the rear wheel continues to turn for more than 20 seconds after the front wheel has stopped, this will
be recorded.
Item
Transmitted data from the FI
ECU cannot be normally
received.
Transmitted data from the
IMU cannot be normally
received.
11
Front wheel sensor (intermittent pulses or no pulses)
Front wheel sensor signal is not received properly. (Pulses are not
received or are received intermittently while the vehicle is travel-
ing.)
8-137
ABS (Anti-lock Brake System)
Symptom
Check or maintenance job
Check the surface of the sensor rotor and wheel sensor
for foreign material, such as metal particles.
Clean the sensor rotor and wheel sensor if necessary.
Check the components for looseness, distortion, and
bends.
Refer to "CHECKING THE FRONT WHEEL" on page
4-27.
Check the surface of the sensor rotor for damage.
Replace the sensor rotor if there is visible damage.
Refer to "MAINTENANCE OF THE FRONT WHEEL
SENSOR AND SENSOR ROTOR" on page 4-29.
Check the wheel sensor for damage and the installed
condition of the sensor. Repair or replace the wheel
sensor if necessary.
Refer to "MAINTENANCE OF THE FRONT WHEEL
SENSOR AND SENSOR ROTOR" on page 4-29.
Check point
• Defective coupler between
FI ECU and hydraulic unit
assembly
• Harness is broken or short-
circuit between FI ECU and
hydraulic unit assembly
• Defective FI ECU
• Defective hydraulic unit
assembly
• Defective coupler between
IMU and hydraulic unit
assembly
• Harness is broken or short-
circuit between IMU and
hydraulic unit assembly
• Defective IMU
• Defective hydraulic unit
assembly