Yamaha MBK XMAX 2014 Service Manual page 422

Fault code
No.
33 Hydraulic unit assembly
(abnormal ABS motor
power supply)
34 Hydraulic unit assembly
(short circuit in ABS motor
power supply circuit)
41 Front wheel ABS (intermit-
tent wheel speed pulses
or incorrect depressuriza-
tion)
42 Rear wheel ABS (intermit-
47 tent wheel speed pulses
or incorrect depressuriza-
tion)
43 Front wheel sensor (miss-
ing pulses)
ABS (ANTI-LOCK BRAKE SYSTEM) (for YP250RA)
Item Symptom
Power is not supplied to
the motor circuit in the hy-
draulic unit assembly.
Short circuit is detected in
the motor power supply
circuit in the hydraulic unit
assembly.
• Pulses from the front
wheel sensor are re-
ceived intermittently
while the vehicle is trav-
eling.
• Front wheel will not re-
cover from the locking
tendency even though
the signal is transmitted
from the ABS ECU to re-
duce the hydraulic pres-
sure.
• Pulses from the rear
wheel sensor are re-
ceived intermittently
while the vehicle is trav-
eling. (For fault code No.
42)
• Rear wheel will not re-
cover from the locking
tendency even though
the signal is transmitted
from the ABS ECU to re-
duce the hydraulic pres-
sure.
Front wheel sensor signal
is not received properly.
(Missing pulses are de-
tected in the signal while
the vehicle is traveling.)
8-105
Check point
• Blown ABS motor fuse
• Defective coupler be-
tween the battery and
the hydraulic unit assem-
bly
• Open or short circuit in
the wire harness be-
tween the battery and
the hydraulic unit assem-
bly
• Defective hydraulic unit
assembly
• Defective hydraulic unit
assembly
• Incorrect installation of
the front wheel sensor
• Incorrect rotation of the
front wheel
• Front brake dragging
• Defective hydraulic unit
assembly
• Incorrect installation of
the rear wheel sensor
(for fault code No. 42)
• Incorrect rotation of the
rear wheel
• Rear brake dragging
• Defective hydraulic unit
assembly
• Foreign material ad-
hered around the front
wheel sensor
• Incorrect installation of
the front wheel
• Defective sensor rotor or
incorrect installation of
the rotor
• Defective front wheel
sensor or incorrect in-
stallation of the sensor