Yamaha Tenere 700 2020, Service Manual

Page: 466 / 472

EVENT CODE TABLE
9-13
240 O
2
sensor
(Correction value re-
mains at upper limit)
Correction value re-
mains at upper limit
during O
2
feedback
• Open or short circuit
in the wire harness
between the sensor
and the ECU
gray/green–gray/
green
pink/black–pink/black
black/blue–black/blue
• Low fuel pressure
• Clogged fuel injector
• Sensor malfunction
• Defective ECU
• Defective fuel injec-
tion system
• If a fault code is indi-
cated, perform the
checks and mainte-
nance jobs for the
fault code first.
* Event code number
240 may be indicated
even if the system is
normal.
241 O
2
sensor
(Correction value re-
mains at lower limit)
Correction value re-
mains at lower limit
during O
2
feedback
• Open or short circuit
in the wire harness
between the sensor
and the ECU
gray/green–gray/
green
pink/black–pink/black
black/blue–black/blue
• Low fuel pressure
• Clogged fuel injector
• Sensor malfunction
• Defective ECU
• Defective fuel injec-
tion system
• If a fault code is indi-
cated, perform the
checks and mainte-
nance jobs for the
fault code first.
* Event code number
241 may be indicated
even if the system is
normal.
242 ISC (idle speed con-
trol)
(Correction value re-
mains at upper limit) Correction value re-
mains at upper limit
while the engine is
idling Low engine idling
speed
• Clogged throttle body
• Improperly adjusted
throttle cable
• Improperly adjusted
clutch cable
• Defective fuel injec-
tion system
• Dirty or worn spark
plug
• Defective battery
• Defective ECU
• Execute the diagnos-
tic mode (diagnostic
code number 67) and
check the ISC main-
tenance require-
ments.
• If a fault code is indi-
cated, perform the
checks and mainte-
nance jobs for the
fault code first.
* Event code number
242 may be indicated
even if the system is
normal.
243 ISC (idle speed con-
trol)
(Correction value re-
mains at lower limit) Correction value re-
mains at lower limit
while the engine is
idling High engine idling
speed
• Improperly adjusted
throttle cable
• Improperly adjusted
clutch cable
• Defective fuel injec-
tion system
• Dirty or worn spark
plug
• Defective battery
• Defective ECU
• If a fault code is indi-
cated, perform the
checks and mainte-
nance jobs for the
fault code first.
* Event code number
243 may be indicated
even if the system is
normal.
No. Item Symptom Possible cause Remarks