Yamaha MT-09 2021 Service Manual page 504

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC
43* Front wheel sensor (miss-
45* ing pulses)
44* Rear wheel sensor (miss-
46* ing pulses)
51 Vehicle system power
supply (voltage of ABS
ECU power supply is high)
53 Vehicle system power
supply (voltage of ABS
ECU power supply is low)
55 Hydraulic unit assembly
(defective ABS ECU)
56 Hydraulic unit assembly
(abnormal internal circuit)
Item
Front wheel sensor signal
is not received properly.
(Missing pulses are de-
tected in the signal while
the vehicle is traveling.)
Rear wheel sensor signal
is not received properly.
(Missing pulses are de-
tected in the signal while
the vehicle is traveling.)
Power voltage supplied to
the ABS ECU in the hy-
draulic unit assembly is
too high.
Power voltage supplied to
the ABS ECU in the hy-
draulic unit assembly is
too low.
Abnormal data is detected
in the hydraulic unit as-
sembly.
Abnormality detected in of
hydraulic unit assembly.
Symptom
9-74
Check point
• 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
• Foreign material ad-
hered around the rear
wheel sensor
• Incorrect installation of
the rear wheel
• Defective sensor rotor or
incorrect installation of
the rotor
• Defective rear wheel
sensor or incorrect in-
stallation of the sensor
• Defective battery
• Disconnected battery
terminal
• Defective charging sys-
tem
• Defective battery
• Defective coupler be-
tween the battery and the
hydraulic unit assembly
• Open or short circuit in
the wire harness be-
tween the battery and the
hydraulic unit assembly
• Defective charging sys-
tem
• Defective hydraulic unit
assembly
• Defective hydraulic unit
assembly