Yamaha R1 Series 2015 Service Manual page 617

Fault code
No.
53 Vehicle system power supply
(voltage of ABS ECU power
supply is low)
55 Hydraulic unit assembly
(defective ABS ECU)
56 Hydraulic unit assembly
(internal circuit abnormal)
57 Vehicle CAN communication
line or power source of vehi-
cle system
62 Power supply voltage failure
in pressure sensor
63 Defective front pressure sen-
sor
64 Defective rear pressure sen-
sor
68 Hydraulic unit assembly
(Defective front pressure
sensor)
69 Hydraulic unit assembly
(Defective rear pressure sen-
sor)
89 CAN communication
(between meter assembly
and hydraulic unit assembly)
Item
Power voltage supplied to
the ABS ECU in the hydrau-
lic unit assembly is too low.
Abnormal data is detected in
the hydraulic unit assembly.
Abnormality detected in of
hydraulic unit assembly.
Short-circuit in CAN commu-
nication line or the voltage
that supplies the hydraulic
unit assembly is too low.
Abnormality detected in
pressure sensor power sup-
ply circuit of hydraulic unit
assembly.
Abnormality detected in
pressure sensor circuit at
front master cylinder side of
hydraulic unit assembly.
Abnormality detected in
pressure sensor circuit at
rear master cylinder side of
hydraulic unit assembly.
Abnormality detected in
pressure sensor circuit at
front caliper side of hydrau-
lic unit assembly.
Abnormality detected in
pressure sensor circuit of
hydraulic unit assembly.
Transmitted data from the
meter cannot be normally
received.
8-136
ABS (Anti-lock Brake System)
Symptom
• Defective battery
• Defective coupler between
• Open or short circuit in the
• Defective charging system
• Defective hydraulic unit
• Defective hydraulic unit
• Short-circuit in CAN com-
• Defective battery
• Defective coupler between
• Wire harness between bat-
• Defective charging system
• Defective hydraulic unit
• Defective front brake line
• Defective hydraulic unit
• Defective rear brake line
• Defective hydraulic unit
In case of electrical interlock-
ing brake
• Defective front brake line
• Defective hydraulic unit
• Defective rear brake line
• Defective hydraulic unit
• Defective coupler between
• Harness is broken or short-
• Defective meter assembly
• Defective hydraulic unit
Check point
the battery and the hydrau-
lic unit assembly
wire harness between the
battery and the hydraulic
unit assembly
assembly
assembly
munication line
battery and hydraulic unit
assembly
tery and hydraulic unit is
interrupted or has short-cir-
cuited
assembly
assembly
assembly
assembly
assembly
meter assembly and
hydraulic unit assembly
circuit between meter
assembly and hydraulic
unit assembly
assembly