Yamaha MBK X-MAX 300 2017, Service Manual

Page: 406 / 462

ABS (ANTI-LOCK BRAKE SYSTEM)
8-101
Fault code No. 31
TIP
Turn the main switch to “OFF” before disconnecting or connecting a coupler.
Fault code No. 32
Fault code No. 33
TIP
Turn the main switch to “OFF” before disconnecting or connecting a coupler.
Fault code No. 31
Item Hydraulic unit assembly (abnormal ABS solenoid power supply)
Symptom
Power is not supplied to the solenoid circuit in the hydraulic unit as-
sembly.
Order Item/components and probable cause Check or maintenance job
1 Blown ABS solenoid fuse Check the ABS solenoid fuse. If the ABS solenoid fuse
is blown, replace the fuse and check the wire harness.
Refer to “CHECKING THE FUSES” on page 8-128.
2 Defective coupler between the battery
and the hydraulic unit assembly • Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect the cou-
pler securely.
See TIP.
3 Open or short circuit in the wire harness
between the battery and the hydraulic unit
assembly • Replace if there is an open or short circuit.
• Between ABS ECU coupler and ABS solenoid fuse.
(red–red)
4 Defective hydraulic unit assembly 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
4-63.
Fault code No. 32
Item
Hydraulic unit assembly (short circuit in ABS solenoid power supply
circuit)
Symptom
Short circuit is detected in the solenoid power supply circuit in the hy-
draulic unit assembly.
Order Item/components and probable cause Check or maintenance job
1 Defective hydraulic unit assembly Replace the hydraulic unit assembly.
Refer to “ABS (ANTI-LOCK BRAKE SYSTEM)” on page
4-63.
Fault code No. 33
Item Hydraulic unit assembly (abnormal ABS motor power supply)
Symptom
Power is not supplied to the motor circuit in the hydraulic unit assem-
bly.
Order Item/components and probable cause Check or maintenance job
1 Blown ABS motor fuse Check the ABS motor fuse. If the ABS motor fuse is
blown, replace the fuse and check the wire harness.
Refer to “CHECKING THE FUSES” on page 8-128.