Front Wheel Abs (Intermittent Wheel Speed Pulses); Front Wheel Sensor (Missing Pulses); Rear Wheel Sensor (Missing Pulses); Voltage Of Abs Ecu Power Supply Is High - Yamaha R1 Series 2015 Service Manual

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 depressurization)
42 Rear wheel ABS (intermit-
tent wheel speed pulses or
incorrect depressurization)
43* Front wheel sensor (missing
45* pulses)
44* Rear wheel sensor (missing
46* pulses)
51 Vehicle system power supply
(voltage of ABS ECU power
supply is high)
Item
Power is not supplied to the
motor circuit in the hydraulic
unit assembly.
Short circuit is detected in
the motor power supply cir-
cuit in the hydraulic unit
assembly.
• Pulses from the front wheel
sensor are received inter-
mittently 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 hydrau-
lic pressure.
• Pulses from the rear wheel
sensor are received inter-
mittently while the vehicle
is traveling.
• 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 hydrau-
lic unit assembly is too high.
8-135
ABS (Anti-lock Brake System)
Symptom
• Blown ABS motor fuse
• Defective coupler between
• Open or short circuit in the
• Defective hydraulic unit
• Defective hydraulic unit
• Incorrect installation of the
• Incorrect rotation of the
• Front brake dragging
• Defective hydraulic unit
• Incorrect installation of the
• Incorrect rotation of the
• Rear brake dragging
• Defective hydraulic unit
• 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
Check point
the battery and the hydrau-
lic unit assembly
wire harness between the
battery and the hydraulic
unit assembly
assembly
assembly
front wheel sensor
front wheel
assembly
rear wheel sensor
rear wheel
assembly
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