Yamaha R15 2022, Service Manual

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8-130
ABS (ANTI-LOCK BRAKE SYSTEM)
– + ELEC
Fault code No. 43
Fault code No. 44
4 Defective hydraulic unit assembly If the above items were performed and no malfunctions
were found, replace the hydraulic unit assembly.
Refer to “ABS (ANTI-LOCK BRAKE SYSTEM)” on page
8-101.
Fault code No. 43
Item Front wheel sensor (missing pulses)
Symptom
Front wheel sensor signal is not received properly. (Missing pulses
are detected in the signal while the vehicle is traveling.)
Order Item/components and probable cause Check or maintenance job
1 Foreign material adhered around the front
wheel sensor 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.
2 Incorrect installation of the front wheel Check the components for looseness, distortion, and
bends.
Refer to “CHECKING THE FRONT WHEEL” on page
4-15.
3 Defective sensor rotor or incorrect instal-
lation of the rotor Check the surface of the sensor rotor for damage. Re-
place the sensor rotor if there is visible damage.
Refer to “MAINTENANCE OF THE WHEEL SENSOR
AND SENSOR ROTOR” on page 4-16.
4 Defective front wheel sensor or incorrect
installation of the sensor 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 WHEEL SENSOR
AND SENSOR ROTOR” on page 4-16.
Fault code No. 44
Item Rear wheel sensor (missing pulses)
Symptom
Rear wheel sensor signal is not received properly. (Missing pulses
are detected in the signal while the vehicle is traveling.)
Order Item/components and probable cause Check or maintenance job
1 Foreign material adhered around the rear
wheel sensor 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.
Fault code No.
42
47
Item
Rear wheel ABS (intermittent wheel speed pulses or incorrect depres-
surization)
Symptom
• Pulses from the rear wheel sensor are received intermittently while
the vehicle is traveling. (for fault code No. 42)
• Rear wheel will not recover from the locking tendency even though
the signal is transmitted from the ABS ECU to reduce the hydraulic
pressure.
Order Item/components and probable cause Check or maintenance job
BCWF8197E0.book Page 130 Thursday, November 18, 2021 9:18 AM