Yamaha R15 2022 Service Manual page 461

Fault code No.
Item
Symptom
Order Item/components and probable cause
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. 34
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Defective hydraulic unit assembly
Fault code No. 41
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Incorrect installation of the front wheel
sensor
ABS (ANTI-LOCK BRAKE SYSTEM)
33
Hydraulic unit assembly (abnormal ABS motor power supply)
Power is not supplied to the motor circuit in the hydraulic unit assem-
bly.
34
Hydraulic unit assembly (short circuit in ABS motor power supply cir-
cuit)
Short circuit is detected in the motor power supply circuit in the hy-
draulic unit assembly.
41
Front wheel ABS (intermittent wheel speed pulses or incorrect de-
pressurization)
• Pulses from the front wheel sensor are received intermittently while
the vehicle is traveling.
• Front wheel will not recover from the locking tendency even though
the signal is transmitted from the ABS ECU to reduce the hydraulic
pressure.
Check or maintenance job
• 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 ground.
(black–black)
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
8-101.
Check or maintenance job
Replace the hydraulic unit assembly.
Refer to "ABS (ANTI-LOCK BRAKE SYSTEM)" on page
8-101.
Check or maintenance job
Check the components for looseness, distortion, and
bends.
Refer to "CHECKING THE FRONT WHEEL" on page
4-15.
8-128
ELEC – +