Yamaha R15 2022, Service Manual

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8-135
ABS (ANTI-LOCK BRAKE SYSTEM)
– + ELEC
Fault code No. 64
Fault code No. 64
Item Rear wheel sensor power supply (voltage of power supply is low)
Symptom
Power voltage supplied from the ABS ECU to the rear wheel sensor is
too low.
Order Item/components and probable cause Check or maintenance job
1 Short circuit in the wire harness between
the rear wheel sensor and the hydraulic
unit assembly • 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/
white 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
2 Defective 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
3 Defective hydraulic unit assembly Replace the hydraulic unit assembly.
Refer to “ABS (ANTI-LOCK BRAKE SYSTEM)” on page
8-101.
3
1 2
4
5
B
R
R/L B/W L/B L/R Br/W
B/W
W/B Y W Br R G
Gy
W/L
Y Br B W
1
2
3
4
B
R
R/L
B/W L/B L/R Br/W
B/W
W/B Y W Br R G
Gy
W/L
Y Br B W
BCWF8197E0.book Page 135 Thursday, November 18, 2021 9:18 AM