Yamaha FZ 25 2021 Supplementary Service Manual page 223

Fault code No.
Item
Symptom
Order Item/components and probable cause
4 Defective hydraulic unit assembly
Fault code No. 31
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 Blown ABS solenoid fuse
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 hydraulic unit assembly
Fault code No. 32
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Defective hydraulic unit assembly
ABS (ANTI-LOCK BRAKE SYSTEM)
24
Brake light switch or tail/brake light
Brake light signal is not received properly while the vehicle is travel-
ing (Brake light circuit, or front or rear brake light switch circuit).
Check or maintenance job
If the above items were performed and no malfunctions
were found, replace the hydraulic unit assembly.
Refer to "ABS (ANTI-LOCK BRAKE SYSTEM)" on page
6-71.
31
Hydraulic unit assembly (abnormal ABS solenoid power supply)
Power is not supplied to the solenoid circuit in the hydraulic unit as-
sembly.
Check or maintenance job
Check the ABS solenoid fuse. If the ABS solenoid fuse
is blown, replace the fuse and check the wire harness.
Refer to "CHECKING THE SWITCHES" on page 6-105.
• 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 solenoid fuse.
(red–red)
If the above items were performed and no malfunctions
were found, replace the hydraulic unit assembly.
Refer to "ABS (ANTI-LOCK BRAKE SYSTEM)" on page
6-71.
32
Hydraulic unit assembly (short circuit in ABS solenoid power supply
circuit)
Short circuit is detected in the solenoid power supply circuit in the hy-
draulic unit assembly.
Check or maintenance job
Replace the hydraulic unit assembly.
Refer to "ABS (ANTI-LOCK BRAKE SYSTEM)" on page
6-71.
6-93
ELEC
– +