Yamaha MT-09 2021 - Self-Diagnostic Function Table (for Fuel Injection System)

9-53
SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
EAS33028
SELF-DIAGNOSTIC FUNCTION TABLE (FOR FUEL INJECTION SYSTEM)
TIP
For details of the DTC, refer to “BASIC PROCESS FOR TROUBLESHOOTING” on page 9-16.
DTC Item
Probable cause of
malfunction
Vehicle symptom
Fail-safe system
operation
30_EVEN
T
Overturn detected. • The vehicle has
overturned.
• Installed condition
of IMU.
• Defective IMU.
• Malfunction in
ECU.
——
70_EVEN
T
Engine forcibly
stops when the ve-
hicle is left idling for
a long period.
• Allow to idle for a
long period of time.
• Malfunction in
ECU.
——
C0520 ECU: no normal sig-
nals or malfunction
signals are received
from the IMU.
• Defective IMU
coupler or ECU
coupler.
• Open or short cir-
cuit in wire har-
ness between IMU
and ECU.
• Improperly in-
stalled IMU.
• Malfunction in
IMU.
• Malfunction in
ECU.
Engine cannot be
started (depending
on the circumstanc-
es).
Engine cannot be
started (depending
on the circumstanc-
es).
P0030 O
2
sensor heater:
defective heater
controller detected.
• Open circuit in wire
harness.
• Disconnected cou-
pler.
• Defective O
2
sen-
sor heater control-
ler (Malfunction in
ECU).
• Broken or discon-
nected lead in O
2
sensor heater.
(When the O
2
sen-
sor does not oper-
ate because the
exhaust tempera-
ture is low)
Increased exhaust
emissions.
Fuel learning cannot
be carried out.
Display only (If the
O
2
sensor does not
operate, O
2
feed-
back is not carried
out.)
Cruise control sys-
tem cannot be oper-
ated. (for
MTN890D)