Yamaha MBK XMAX 2014 Service Manual page 427

Fault code No.
Item
Symptom
Item/components and probable
Order
cause
3 Defective sensor rotor or incorrect in-
stallation of the rotor
4 Defective rear wheel sensor or incor-
rect installation of the sensor
TIP
If pulse gaps are detected when the vehicle is traveling at a speed of 30 km/h (19 mph) or more, fault
code No. 18 will be recorded. If the vehicle is traveling at a speed of 29 km/h (18 mph) or less, fault
code No. 46 will be recorded first and fault code No. 18 will be recorded if the condition continues.
Fault code No.
Item
Symptom
Item/components and probable
Order
cause
1 Defective hydraulic unit assembly
Fault code No.
Item
Symptom
Item/components and probable
Order
cause
1 Defective signaling system (tail/brake
light or brake light switch)
2 Defective coupler between the signal-
ing system (tail/brake light or brake
light switch) and the hydraulic unit as-
sembly
ABS (ANTI-LOCK BRAKE SYSTEM) (for YP125RA)
18
46
Rear wheel sensor (missing pulses)
Rear wheel sensor signal is not received properly. (Missing
pulses are detected in the signal while the vehicle is traveling.)
21
Hydraulic unit assembly (defective solenoid drive circuit)
Solenoid drive circuit in the hydraulic unit assembly is open or
short-circuited.
24
Brake light switch or tail/brake light
Brake light signal is not received properly while the vehicle is
traveling (brake light circuit, or front or rear brake light switch
circuit).
Check or maintenance job
Check the surface of the sensor rotor for damage.
Replace the sensor rotor if there is visible damage.
Refer to "MAINTENANCE OF THE REAR WHEEL
SENSOR ROTOR (for YP125RA)" on page 4-29.
Check the wheel sensor for damage and the in-
stalled condition of the sensor. Repair or replace
the wheel sensor if necessary.
Refer to "MAINTENANCE OF THE REAR WHEEL
SENSOR (for YP125RA)" on page 4-87.
Check or maintenance job
Replace the hydraulic unit assembly.
Refer to "ABS (ANTI-LOCK BRAKE SYSTEM) (for
YP125RA)" on page 4-62.
Check or maintenance job
Check the tail/brake light and brake light switches.
Refer to "CHECKING THE SWITCHES" on page
8-131.
• 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
coupler securely.
8-114