Yamaha MTN690-U Owner's Manual page 19

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light remains on after adding oil,
stop the engine and have a Yamaha
dealer check the vehicle.
Coolant temperature warning
light "
"
This warning light comes on when the
engine is overheating. If this occurs,
stop the engine immediately and allow
the engine to cool. (See page 6-36.)
For vehicles with a radiator fan, the ra-
diator fan(s) automatically switch on or
off according to the coolant tempera-
ture.
TIP
When the vehicle is turned on, the light
will come on for a few seconds, and
then go off. If the light does not come
on, or if the light remains on, have a
Yamaha dealer check the vehicle.
NOTICE
Do not continue to operate the en-
gine if it is overheating.
Malfunction indicator light
(MIL) "
"
This light comes on or flashes if a prob-
lem is detected in the engine or other
EAU88880
vehicle control system. If this occurs,
have a Yamaha dealer check the on-
board diagnostic system. The electri-
cal circuit of the warning light can be
checked by turning the vehicle power
on. The light should come on for a few
seconds, and then go off. If the light
does not come on initially when the ve-
hicle power is turned on, or if the light
remains on, have a Yamaha dealer
check the vehicle.
NOTICE
If the MIL starts flashing, reduce en-
gine speed to prevent exhaust sys-
tem damage.
TIP
ECA10022
The engine is sensitively monitored by
the on-board diagnostic system to de-
tect deterioration or malfunction of the
emission control system. Therefore the
MIL may come on or flash due to vehi-
cle modifications, lack of maintenance,
Instrument and control functions
or excessive/improper use of the mo-
EAU91840
torcycle. To prevent this, observe
these precautions.
 Do not attempt to modify the soft-
 Do not add any electrical acces-
 Do not use aftermarket accesso-
 Do not change the drivetrain
 Do not remove or alter the O2 sen-
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 Maintain the drive chain properly.
 Maintain correct tire pressure.
 Maintain
 Do not operate the vehicle in an
3-4
ware of the engine control unit.
sories that interfere with engine
control.
ries or parts such as suspension,
spark plugs, injectors, exhaust
system, etc.
specifications (chain, sprockets,
wheels, tires, etc.).
sor, air induction system, or ex-
haust parts (catalysts or EXUP,
etc.).
proper
brake
height to prevent rear brake from
dragging.
extreme manner. For example, re-
peated or excessive opening and
3
pedal

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