Yamaha FZ 25 2021 Supplementary Service Manual page 231

Fault code No. 64
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Short circuit in the wire harness between
the rear wheel sensor and the hydraulic
unit assembly
2 Defective rear wheel sensor
3 Defective hydraulic unit assembly
ABS (ANTI-LOCK BRAKE SYSTEM)
64
Rear wheel sensor power supply (voltage of power supply is low)
Power voltage supplied from the ABS ECU to the rear wheel sensor is
too low.
Check or maintenance job
• Check that there is no short circuit between the yellow
terminal "1" and the brown terminal "2".
• Check that there is no short circuit between the black
terminal "3" and the yellow terminal "1".
• If there is a short circuit, the wire harness is defective.
Replace the wire harness.
4. ABS ECU
5. Rear wheel sensor
• Check that there is no short circuit between the black
terminal "1" and the white terminal "2".
• If there is a short circuit, the wheel sensor is defective.
Repair or replace the wheel sensor.
3. ABS ECU
4. Rear wheel sensor
Replace the hydraulic unit assembly.
Refer to "ABS (ANTI-LOCK BRAKE SYSTEM)" on page
6-71.
6-101
ELEC
3
G R Br Y W/L W
B
R
R/L
B
G/Y Br W/B L/B B/W
G R Br Y W/L W
R B
R/L
B
G/Y Br W/B L/B B/W
– +
2
1
Br Y W B
5
4
1
2
Br Y W B
4
3