Yamaha XVS950CU 2014 Service Manual page 516

ABS (ANTI-LOCK BRAKE SYSTEM) (for ABS models)
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)
Item
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.)
7-125
Symptom
• Blown ABS motor fuse
• Defective coupler be-
• Open or short circuit in
• Defective hydraulic unit
• Defective hydraulic unit
• Incorrect installation of
• Incorrect rotation of the
• Front brake dragging
• Defective hydraulic unit
• Incorrect installation of
• Incorrect rotation of the
• Rear brake dragging
• Defective hydraulic unit
• Foreign material ad-
• Incorrect installation of
• Defective sensor rotor or
• Defective front wheel
Check point
tween the battery and
the hydraulic unit assem-
bly
the wire harness be-
tween the battery and
the hydraulic unit assem-
bly
assembly
assembly
the front wheel sensor
front wheel
assembly
the rear wheel sensor
(for fault code No. 42)
rear wheel
assembly
hered around the front
wheel sensor
the front wheel
incorrect installation of
the rotor
sensor or incorrect in-
stallation of the sensor