Yamaha MTN850-A 2017 Service Manual page 503

Fault code No.
Item
Symptom
Order Item/components and probable cause
3 Defective hydraulic unit assembly
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
ABS (ANTI-LOCK BRAKE SYSTEM)
63
Front wheel sensor power supply (voltage of power supply is low)
Power voltage supplied from the ABS ECU to the front wheel sensor
is too low.
Check or maintenance job
Replace the hydraulic unit assembly.
Refer to "ABS (ANTI-LOCK BRAKE SYSTEM)" on page
4-49.
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 white
terminal "1" and the black terminal "2".
• Check that there is no short circuit between the
black/yellow terminal "3" and the white terminal "1".
• If there is a short circuit, the wire harness is defective.
Replace the wire harness.
4. ABS ECU
5. 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. Wheel sensor
8-146
2 1
3
4 5
2 1
3 4