Yamaha FZ 25 2021, Supplementary Service Manual

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6-97
– +
ELEC
ABS (ANTI-LOCK BRAKE SYSTEM)
Fault code No. 44
Fault code No. 51, 52
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.
2 Incorrect installation of the rear wheel Check the components for looseness, distortion, and
bends.
Refer to “CHECKING THE REAR WHEEL” in base ser-
vice manual B97-F8197-E0 on page 4-14.
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 4-8.
4 Defective rear 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 4-8.
Fault code No.
51
52
Item
• Vehicle system power supply (voltage of ABS ECU power supply is
high) (for fault code No. 51)
• Vehicle system power supply (voltage of wheel sensor power supply
is high) (for fault code No. 52)
Symptom
• Power voltage supplied to the ABS ECU in the hydraulic unit assem-
bly is too high. (for fault code No. 51)
• Power voltage supplied to the wheel sensor is too high. (for fault
code No. 52)
Order Item/components and probable cause Check or maintenance job
1 Defective battery Recharge or replace the battery.
Refer to “CHECKING AND CHARGING THE BATTERY”
in base service manual B97-F8197-E0 on page 7-62.
2 Disconnected battery terminal Check the connection. Replace or reconnect the termi-
nal if necessary.
3 Defective charging system Check the charging system.
Refer to “CHARGING SYSTEM” on page 6-10.
B9X-F8197-E0.book Page 97 Thursday, July 16, 2020 2:28 PM