Yamaha MBK X-MAX 300 2017 Service Manual page 397

Fault code No.
42 Rear wheel ABS (intermit-
47 tent wheel speed pulses or
incorrect depressurization)
43 Front wheel sensor (missing
pulses)
44 Rear wheel sensor (missing
pulses)
51 • Vehicle system power sup-
52 ply (voltage of ABS ECU
power supply is high) (for
fault code No. 51)
• Vehicle system power sup-
ply (voltage of wheel sen-
sor power supply is high)
(for fault code No. 52)
53 Vehicle system power supply
(voltage of ABS ECU power
supply is low)
ABS (ANTI-LOCK BRAKE SYSTEM)
Item
• Pulses from the rear wheel
sensor are received inter-
mittently while the vehicle
is traveling. (for fault code
No. 42)
• Rear wheel will not recover
from the locking tendency
even though the signal is
transmitted from the ABS
ECU to reduce the hydrau-
lic pressure.
Front wheel sensor signal is
not received properly. (Miss-
ing pulses are detected in
the signal while the vehicle is
traveling.)
Rear wheel sensor signal is
not received properly. (Miss-
ing pulses are detected in
the signal while the vehicle is
traveling.)
• Power voltage supplied to
the ABS ECU in the hy-
draulic unit assembly is too
high. (for fault code No. 51)
• Power voltage supplied to
the wheel sensor is too
high. (for fault code No. 52)
Power voltage supplied to
the ABS ECU in the hydrau-
lic unit assembly is too low.
8-92
Symptom
• Incorrect installation of the
• Incorrect rotation of the
• Rear brake dragging
• Defective hydraulic unit as-
• Foreign material adhered
• Incorrect installation of the
• Defective sensor rotor or
• Defective front wheel sen-
• Foreign material adhered
• Incorrect installation of the
• Defective sensor rotor or
• Defective rear wheel sen-
• Defective battery
• Disconnected battery ter-
• Defective charging system
• Defective battery
• Defective coupler between
• Open or short circuit in the
• Defective charging system
Check point
rear wheel sensor (for fault
code No. 42)
rear wheel
sembly
around the front wheel sen-
sor
front wheel
incorrect installation of the
rotor
sor or incorrect installation
of the sensor
around the rear wheel sen-
sor
rear wheel
incorrect installation of the
rotor
sor or incorrect installation
of the sensor
minal
the battery and the hydrau-
lic unit assembly
wire harness between the
battery and the hydraulic
unit assembly