Yamaha FZ 25 2021 Supplementary Service Manual page 228

Fault code No. 53
TIP
Turn the main switch to "OFF" before disconnecting or connecting a coupler.
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Defective battery
2 Defective coupler between the battery
and the hydraulic unit assembly
3 Open or short circuit in the wire harness
between the battery and the hydraulic unit
assembly
4 Defective charging system
Fault code No. 54
Turn the main switch to "OFF" before disconnecting or connecting a coupler.
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Defective battery
2 Defective coupler between the battery
and the hydraulic unit assembly
3 Open or short circuit in the wire harness
between the battery and the hydraulic unit
assembly
ABS (ANTI-LOCK BRAKE SYSTEM)
53
Vehicle system power supply (voltage of ABS ECU power supply is
low)
Power voltage supplied to the ABS ECU in the hydraulic unit assem-
bly is too low.
Check or maintenance job
Recharge or replace the battery.
Refer to "CHECKING AND CHARGING THE BATTERY"
in base service manual B97-F8197-E0 on page 7-62.
• Check the coupler for any pins that may be pulled out.
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect the cou-
pler securely.
See TIP.
• Replace if there is an open or short circuit.
• Between ABS ECU coupler and ABS control unit fuse.
(brown–brown)
Check the charging system.
Refer to "CHARGING SYSTEM" on page 6-10.
54
Hydraulic unit assembly (defective ABS solenoid and ABS motor
power supply circuits)
Abnormality is detected in the solenoid or motor power supply circuit
in the hydraulic unit assembly.
Check or maintenance job
Recharge or replace the battery.
Refer to "CHECKING AND CHARGING THE BATTERY"
in base service manual B97-F8197-E0 on page 7-62.
• Check the coupler for any pins that may be pulled out.
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect the cou-
pler securely.
See TIP.
• Replace if there is an open or short circuit.
• Between ABS ECU coupler and ABS motor fuse.
(red/blue–red/blue)
• Between ABS ECU coupler and ABS solenoid fuse.
(red–red)
6-98
ELEC
– +