Yamaha YZF-R1 Series Service Manual page 552

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC
57 Vehicle CAN communication
line or power source of vehi-
cle system
62 Power supply voltage failure
in pressure sensor
68 Defective hydraulic unit as-
sembly (defective front pres-
sure sensor)
89 CAN communication (be-
tween meter assembly and
hydraulic unit assembly)
90 CAN communication (be-
tween ECU and hydraulic
unit assembly)
91 CAN communication (be-
tween IMU and hydraulic unit
assembly)
* The DTC number varies according to the vehicle conditions.
Item
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 caliper side of hydrau-
lic unit assembly.
Transmitted data from the
meter cannot be normally re-
ceived.
Transmitted data from the FI
ECU cannot be normally re-
ceived.
Transmitted data from the
IMU cannot be normally re-
ceived.
9-55
Symptom
• Short-circuit in CAN com-
munication line
• Defective battery
• Defective coupler between
battery and hydraulic unit
assembly
• Wire harness between bat-
tery and hydraulic unit is in-
terrupted or has short-
circuited
• Defective charging system
• Defective hydraulic unit as-
sembly
In case of electrical interlock-
ing brake
• Defective front brake line
• Defective hydraulic unit as-
sembly
• Defective coupler between
meter assembly and hy-
draulic unit assembly
• Harness is broken or short-
circuit between meter as-
sembly and hydraulic unit
assembly
• Defective meter assembly
• Defective hydraulic unit as-
sembly
• Defective coupler between
FI ECU and hydraulic unit
assembly
• Harness is broken or short-
circuit between FI ECU and
hydraulic unit assembly
• Defective FI ECU
• Defective hydraulic unit as-
sembly
• Defective coupler between
IMU and hydraulic unit as-
sembly
• Harness is broken or short-
circuit between IMU and
hydraulic unit assembly
• Defective IMU
• Defective hydraulic unit as-
sembly
Check point