Yamaha FZ 25 2021 Supplementary Service Manual page 215

Fault code No.
54 Hydraulic unit assembly (de-
fective ABS solenoid and
ABS motor power supply cir-
cuits)
55 Hydraulic unit assembly (de-
fective ABS ECU)
56 Hydraulic unit assembly (ab-
normal internal power sup-
ply)
63 Front wheel sensor power
supply (voltage of power
supply is low)
64 Rear wheel sensor power
supply (voltage of power
supply is low)
* The fault code number varies according to the vehicle conditions.
ABS (ANTI-LOCK BRAKE SYSTEM)
Item
Abnormality is detected in
the solenoid or motor power
supply circuit in the hydraulic
unit assembly.
Abnormal data is detected in
the hydraulic unit assembly.
Abnormality is detected in
the power supply circuit in
the hydraulic unit assembly.
Power voltage supplied from
the ABS ECU to the front
wheel sensor is too low.
Power voltage supplied from
the ABS ECU to the rear
wheel sensor is too low.
6-85
Symptom
• Defective battery
• Defective coupler between
• Open or short circuit in the
• Defective charging system
• Defective hydraulic unit as-
• Defective hydraulic unit as-
• Defective hydraulic unit as-
• Short circuit in the wire har-
• Defective front wheel sen-
• Defective hydraulic unit as-
• Short circuit in the wire har-
• Defective rear wheel sen-
• Defective hydraulic unit as-
ELEC
–
Check point
the battery and the hydrau-
lic unit assembly
wire harness between the
battery and the hydraulic
unit assembly
sembly
sembly
sembly
ness between the front
wheel sensor and the hy-
draulic unit assembly
sor
sembly
ness between the rear
wheel sensor and the hy-
draulic unit assembly
sor
sembly
+