2021 YAMAHA MT-09 check engine

Periodic maintenance an d a djustment
7-35
7
EAU86420
En gine overheatin g
WARNING
EWAT1041
Do not remove the ra diator cap when the en gine an d ra diator are hot. Scal din g hot flui d an d steam may be
b lown out un der pressure, which coul d cause serious injury. Be sure to wait until the en gine has coole d.
 Place a thick ra g, like a towel, over the ra diator cap, an d then slowly rotate the cap counterclockwise to the
d etent to allow any resi dual pressure to escape. When the hissin g soun d has stoppe d, press d own on the cap
while turnin g it counterclockwise, an d then remove the cap.TIPIf coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended cool-
ant as soon as possible.
Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.Add coolant. (See TIP.)
Start the engine. If the engine overheats again,
have a
Yamaha dealer check
and repair the cooling system.
There is
leakage.
There is
no leakage.
UB7NE0E0.book Page 35 Friday, October 2, 2020 4:38 PM

Motorcycle care and stora ge
8-4
8 1. Make all necessary repairs and
perform any outstanding mainte-
nance.
2. Follow all instructions in the Care section of this chapter.
3. Fill up the fuel tank, adding fuel stabilizer according to product in-
structions. Run the engine for 5
minutes to distribute treated fuel
through the fuel system.
4. For vehicles equipped with a fuel cock: Turn the fuel cock lever to
the off position.
5. For vehicles with a carburetor: To prevent fuel deposits from build-
ing up, drain the fuel in the carbu-
retor float chamber into a clean
container. Retighten the drain bolt
and pour the fuel back into the fuel
tank.
6. Use a quality engine fogging oil according to product instructions
to protect internal engine compo-
nents from corrosion. If engine
fogging oil is not available, per-
form the following steps for each
cylinder:a. Remove the spark plug cap and spark plug. b. Pour a teaspoonful of engine
oil into the spark plug bore.
c. Install the spark plug cap onto the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several times with the starter. (This will
coat the cylinder wall with oil.)
WARNING! To prevent d am-
a g e or injury from sparkin g,
make sure to groun d the
spark plu g electro des while
turnin g the en gine over.
[EWA10952]
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap.
7. Lubricate all control cables, piv- ots, levers and pedals, as well as
the sidestand and centerstand (if
equipped).
8. Check and correct the tire air pressure, and then lift the vehicle
so that all wheels are off the
ground. Otherwise, turn the wheels a little once a month in or-
der to prevent the tires from be-
coming degraded in one spot.
9. Cover the muffler outlet with a plastic bag to prevent moisture
from entering it.
10. Remove the battery and fully char- ge it, or attach a maintenance
charger to keep the battery opti-
mally charged. NOTICE: Confirm
that the battery an d its char ger
are compati ble. Do not char ge a
VRLA battery with a convention-
al char ger.
[ECA26330]
TIP If the battery will be removed,
charge it once a month and store
it in a temperate location between
0-30 °C (32-90 °F).
 See page 7-28 for more informa-
tion on charging and storing the
battery.
UB7NE0E0.book Page 4 Friday, October 2, 2020 4:38 PM

Consumer information
10-2
10The model label is affixed to the frame
under the seat. (See page 4-24.) Re-
cord the information on this label in the
space provided. This information will
be needed when ordering spare parts
from a Yamaha dealer.
EAU69910
Dia
gnostic connectorThe diagnostic connector is located as
shown.
EAU85300
Vehicle data recor din gThis model’s ECU stores certain vehi-
cle data to assist in the diagnosis of
malfunctions and for research, statisti-
cal analysis and development purpos-
es.
Although the sensors and recorded
data will vary by model, the main data
points are:
 Vehicle status and engine perfor-
mance data
 Fuel-injection and emission-relat-
ed data
This data will be uploaded only when a
special Yamaha diagnostic tool is at-
tached to the vehicle, such as when
maintenance checks or service proce-
dures are performed.
Vehicle data uploaded will be handled
appropriately according to the follow-
ing Privacy Policy.
Privacy Policy
1. Diagnostic connector
111
https://www.yamaha-motor.eu/eu/
privacy/privacy-policy.aspx
UB7NE0E0.book Page 2 Friday, October 2, 2020 4:38 PM

11-1
11
IndexAABS warning light ................................... 4-7
Air filter element .................................... 7-14
Auxiliary DC connectors ....................... 4-30
Auxiliary system warning light ................ 4-8BBattery .................................................. 7-28
BC ........................................................... 3-4
Brake and clutch levers, checking and
lubricating ........................................... 7-26
Brake and shift pedals, checking and lubricating ........................................... 7-25
Brake control system (BC) .................... 4-20
Brake fluid, changing ............................ 7-21
Brake fluid level, checking .................... 7-20
Brake lever ............................................ 4-19
Brake lever free play, checking............. 7-18
Brake light switches.............................. 7-19
Brake pedal........................................... 4-19CCables, checking and lubricating ......... 7-24
Canister................................................. 7-10
Care ........................................................ 8-1
Catalytic converter ................................ 4-24
Clutch lever ........................................... 4-18
Clutch lever free play, adjusting ........... 7-18
Coolant ................................................. 7-13DData recording, vehicle ......................... 10-2
Diagnostic connector............................ 10-2
Dimmer switch ........................................ 4-4
Display .................................................... 4-9
Display, menu screen ........................... 4-14
D-MODE ................................................. 3-1 Drive chain, cleaning and lubricating ... 7-24
Drive chain slack .................................. 7-22
EEngine break-in ...................................... 6-1
Engine idling speed, checking ............. 7-14
Engine oil .............................................. 7-10
Engine overheating ............................... 7-35
Engine serial number ............................ 10-1FFront and rear brake pads, checking ... 7-19
Front fork, adjusting ............................. 4-26
Front fork, checking ............................. 7-27
Fuel ....................................................... 4-22
Fuel consumption, tips for reducing ...... 6-4
Fuel level warning light ........................... 4-6
Fuel tank cap ........................................ 4-21
Fuel tank overflow hose ....................... 4-23
Fuses, replacing ................................... 7-30HHandlebar position, adjusting .............. 4-25
Handlebar switches ................................ 4-3
Hazard switch......................................... 4-4
High beam indicator light ....................... 4-6
Horn switch ............................................ 4-4IIdentification numbers .......................... 10-1
Ignition circuit cut-off system ............... 4-31
Immobilizer system ................................ 4-1
Immobilizer system indicator light .......... 4-7
Indicator lights and warning lights ......... 4-5LLicense plate light ................................ 7-32
Luggage strap holders ......................... 4-30
MMain switch/steering lock .......................4-2
Maintenance and lubrication, periodic....7-5
Maintenance, emission control
system ..................................................7-3
Malfunction indicator light (MIL)..............4-6
Manual TCS settings .............................4-15
Matte color, caution ................................8-1
Model label ...........................................10-1NNeutral indicator light ..............................4-6OOil pressure and Coolant temperature warning light .........................................4-8PParking ....................................................6-5
Part locations ..........................................2-1
Pass switch .............................................4-4QQSS .........................................................3-3RRider footrest position, adjusting ..........4-25SSafety information ...................................1-1
Seat .......................................................4-24
Shifting ....................................................6-3
Shift pedal .............................................4-18
Shock absorber assembly, adjusting ....4-28
Sidestand ..............................................4-30
Sidestand, checking and lubricating.....7-26
Spark plugs, checking ............................7-9
Special features ......................................3-1
Specifications .........................................9-1
Stability control indicator light ................4-7
UB7NE0E0.book Page 1 Friday, October 2, 2020 4:38 PM

Index
11-2
11
Starting the engine ................................. 6-2
Steering, checking ................................ 7-28
Stop/Run/Start switch ............................ 4-4
Storage ................................................... 8-3
Supporting the motorcycle ................... 7-32
Swingarm pivots, lubricating ................ 7-27TTCS-MODE............................................. 3-1
Throttle grip, checking and
lubricating........................................... 7-25
Tires ...................................................... 7-15
Tool kit .................................................... 7-2
Troubleshooting.................................... 7-33
Troubleshooting chart .......................... 7-34
Turn signal indicator lights ..................... 4-6
Turn signal switch................................... 4-4VValve clearance .................................... 7-15
Vehicle identification number ............... 10-1
Vehicle lights ........................................ 7-32WWheel bearings, checking .................... 7-28
Wheels .................................................. 7-17YYamalube.............................................. 7-12
UB7NE0E0.book Page 2 Friday, October 2, 2020 4:38 PM