check engine light YAMAHA TMAX 2021 Owners Manual

Table of contentsSafety information ............................ 1-1
Further safe-riding points ............... 1-5
Description ....................................... 2-1
Left view ......................................... 2-1
Right view ....................................... 2-2
Controls and instruments ............... 2-3
Smart key system ........................... 3-1
Smart key system ........................... 3-1
Operating range of the smart key system......................................... 3-2
Handling of the smart key and mechanical key ........................... 3-3
Smart key ....................................... 3-5
Replacing the smart key battery..... 3-6
Powering on the vehicle ................. 3-7
Powering off the vehicle ................. 3-8
How to lock the steering ................ 3-9
How to lock the centerstand ........ 3-10
Storage compartment and fuel tank access ............................... 3-11
Parking mode ............................... 3-13
Special features ............................... 4-1
Cruise control system..................... 4-1
D-mode (drive mode)...................... 4-3
Traction control system .................. 4-4
Instrument an d control functions ... 5-1
Handlebar switches ........................ 5-1 Indicator lights and warning
lights ............................................ 5-2
Speedometer .................................. 5-4
Tachometer ..................................... 5-5
Multi-function display...................... 5-5
Front brake lever ........................... 5-17
Rear brake lever ............................ 5-18
Rear brake lock lever .................... 5-18
Anti-lock brake system (ABS) ....... 5-19
Fuel tank cap ................................ 5-20
Fuel ............................................... 5-20
Fuel tank overflow hose ................ 5-22
Catalytic converter ........................ 5-22
Storage compartments ................. 5-23
Rear view mirrors .......................... 5-24
Shock absorber assembly ............ 5-25
Auxiliary DC jack ........................... 5-26
Sidestand ...................................... 5-27
Ignition circuit cut-off system ....... 5-28
For your safety – pre-operation
checks ............................................... 6-1
Operation an d important ri din g
points ................................................. 7-1
Engine break-in ............................... 7-1
Starting the engine .......................... 7-2
Starting off ...................................... 7-3
Acceleration and deceleration ........ 7-3
Braking ............................................ 7-3 Tips for reducing fuel
consumption ............................... 7-4
Parking............................................ 7-4
Perio dic maintenance an d
a d justment ........................................ 8-1
Tool kit ............................................ 8-2
Periodic maintenance charts .......... 8-3
Periodic maintenance chart for the emission control system ............. 8-3
General maintenance and
lubrication chart .......................... 8-5
Removing and installing panels ...... 8-9
Checking the spark plugs ............. 8-11
Canister ........................................ 8-12
Engine oil and oil filter cartridge ... 8-12
Why Yamalube.............................. 8-15
Coolant ......................................... 8-15
Replacing the engine air filter element and cleaning the
check hose ................................ 8-17
V-belt air filter elements ................ 8-18
Checking the engine idling speed ........................................ 8-18
Checking the throttle grip free play ............................................ 8-19
Valve clearance............................. 8-19
Tires .............................................. 8-19
Cast wheels .................................. 8-21
Checking the front and rear brake lever free play .................. 8-22UB3TE1E0.book Page 1 Friday, September 11, 2020 8:48 AM

Smart key system
3-8
3
If the steering continues to be
locked and will not release, the
smart key system indicator light
will flash slowly. Move the handle-
bar gently to the left and right to
help release the steering lock and
then press the “ON/ ” switch
again.
 The smart key system indicator
light will flash if the centerstand
lock cannot automatically release
itself. Gently rock the vehicle for-
ward or backward and then press
the “ON/ ” switch one more
time.
 If the centerstand continues to be
locked and will not release, the
smart key system indicator light
will flash slowly. Rock the vehicle
forward and backward to help re-
lease the centerstand lock and
then press the “ON/ ” switch
again.
NOTICE
ECA15826
If the steerin g lock or centerstan d
lock will not release an d the smart
key system in dicator li ght is flash-
in g, have a Yamaha d ealer check the
smart key system.3. The power of the vehicle is turned on when all locks have been re-
leased. The multi-function display
will come on.
4. The engine can now be started. (See page 7-2.)TIPSee page 8-39 for information about
emergency mode and how to turn the
vehicle power on without the smart
key.
EAU78033
Powerin g off the vehicleTo turn the vehicle power off and stop
the engine if it is running, press the
“OFF/LOCK” switch.
Upon authentification of the smart key,
the beeper will sound once to confirm
that the vehicle power has been suc-
cessfully turned off and the storage
compartment and fuel tank cap lid
locks will be released.TIP The rider must turn off the power
of the vehicle manually.
 The power of the vehicle will not
turn off automatically even if the
smart key is moved out of operat-
ing range of the smart key system.1. “OFF/LOCK” switch
1
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Special features
4-4
4
EAU88851
Traction control systemThe traction control system (TCS)
helps maintain traction when acceler-
ating on slippery surfaces, such as un-
paved or wet roads. If sensors detect
that the rear wheel is starting to slip
(uncontrolled spinning), the traction
control system assists by regulating
engine power as needed until traction
is restored.
When traction control has engaged,
the “ ” indicator light will flash. You
may notice changes in engine re-
sponse or exhaust sounds.
WARNING
EWA18860
The traction control system is not a
substitute for ri din g appropriately
for the con ditions. Traction control
cannot prevent loss of traction d ue
to excessive spee d when enterin g
turns, when acceleratin g har d at a
sharp lean an gle, or while b raking,
an d cannot prevent front wheel slip-
pin g. As with any vehicle, approach
surfaces that may be slippery with
caution an d avoi d especially slip-
pery surfaces.
Settin g the traction control system
When the vehicle is turned on, traction
control is automatically turned on.
To turn the traction control system off,
see page 5-11.TIP Turn the traction control system
off to help free the rear wheel if the
vehicle gets stuck in mud, sand, or
other soft surfaces.
 When the vehicle is on the center-
stand, do not rev the engine for an
extended period of time. Other-
wise, the traction control system
will automatically disable and
need to be reset.
NOTICE
ECA16801
Use only the specifie d tires. (See
pa ge 8-19.) Usin g different size d
tires will prevent the traction control
system from controllin g tire rotation
accurately.Resettin g the traction control sys-
tem
The traction control system will auto-
matically disable under certain condi-
tions; such as when a sensor fault is
detected, or when only one wheel is al-
lowed to rotate for more than a few
seconds. Should this happen,
the “ ” indicator light will come on.
If the traction control system automat-
ically disables, reset it by riding under
normal conditions.TIPIf the Ž indicator light remains on,
the vehicle may still be ridden; howev-
er, have a Yamaha dealer check the
vehicle as soon as possible.
1. Traction control system indicator light Ž
1 1 1
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Instrument and control functions
5-3
5
EAU88690
Hi gh beam in dicator li ght “ ”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU77551
Cruise control in dicator li ghts
See page 4-1 for an explanation of
these indicator lights.
EAU88711
Malfunction in dicator li ght
(MIL) “ ”
This light comes on or flashes if a prob-
lem is detected in the engine or other
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 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 vehicle pow-
er on, or if the light remains on, have a
Yamaha dealer check the vehicle.
NOTICE
ECA26820
If the MIL starts flashin g, re duce en-
g ine spee d to prevent exhaust sys-
tem damag e.TIPThe engine is sensitively controlled for
the on-board diagnostic system to de-
tect deterioration and malfunction of
the emission control system. Due to
this specification, the MIL may come
on or flash for vehicle modifications,
lack of maintenance, or excessive or
improper use of the vehicle. To prevent
this, observe these precautions.
 Do not attempt to modify the soft-
ware of the engine control unit.
 Do not add any electrical acces-
sories that interfere with engine
control.
 Do not use aftermarket accesso-
ries or parts such as suspension,
spark plugs, injectors, exhaust
system, etc.
 Do not change drivetrain specifi-
cations (chain, sprockets, wheels,
tires, etc.). 
Do not remove or alter the O2 sen-
sor, air induction system, or ex-
haust parts (catalysts or EXUP,
etc.).
 Maintain proper V-belt and drive
belt (if equipped).
 Maintain correct tire pressure.
 Do not operate the vehicle in an
extreme manner. For example, re-
peated or excessive opening and
closing of the throttle, racing,
burnouts, wheelies, etc.
EAU77075
ABS warnin g li ght “ ”
This warning light comes on when a
problem is detected with the ABS. (See
page 5-19.)
When the vehicle power is turned on,
this light will come on and then go off
after reaching a traveling speed of 10
km/h (6 mi/h). If the warning light:  does not come on when the vehi-
cle power is turned on
 does not go off after traveling at a
speed of 10 km/h (6 mi/h) or high-
er
 comes on or flashes while riding
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Instrument and control functions
5-4
5
the anti-lock brake system may not
work correctly. Have a Yamaha dealer
check the vehicle as soon as possible.
WARNING
EWA16043
If the ABS warnin
g li ght does not
turn off after reachin g 10 km/h (6
mi/h), or if the warnin g lig ht comes
on while ri din g:
 Use extra caution to avoi d pos-
si ble wheel lock durin g emer-
g ency brakin g.
 Have a Yamaha dealer check
the vehicle as soon as possi ble.TIPThe ABS warning light may come on
when revving the engine with the
scooter on its centerstand, but this
does not indicate a malfunction.
EAU88700
Traction control system in dicator
lig ht “ ”
This indicator light will flash when trac-
tion control has engaged.
If the traction control system is turned
off, this indicator light will come on.
TIPWhen the vehicle is turned on, the light
should 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.
EAU78083
Smart key system in dicator
li g ht “ ”
This indicator light will flash when com-
munication between the vehicle and
smart key takes place and when cer-
tain smart key system operations are
carried out.
The indicator light may also flash when
there is an error in the smart key sys-
tem.TIPWhen the vehicle is turned on, the light
should 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.
EAU77131
Spee dometerThe speedometer shows the vehicle’s
traveling speed.
When the vehicle power is turned on,
the speedometer needle will sweep
across the speed range and return to
zero in order to test the electrical cir-
cuit.1. Speedometer
1 1 1
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Instrument and control functions
5-28
5
EAU63612
Ig nition circuit cut-off systemThe ignition circuit cut-off system
(comprising the sidestand switch and
brake light switches) has the following
functions.
 It prevents starting when the side-
stand is up, but neither brake is applied.
 It prevents starting when either
brake is applied, but the sidestand
is still down.
 It cuts the running engine when
the sidestand is moved down.
Periodically check the operation of the
ignition circuit cut-off system accord-
ing to the following procedure.
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Operation and important rid ing points
7-2
7
EAU88770
Startin g the eng ineThe ignition circuit cut-off system will
enable starting when the sidestand is
up.
To start the engine1. With the smart key turned on, ap-
proach the vehicle.
2. Push the “ON/ ” switch and set the engine stop switch to the run
position.
Upon authentication of the smart
key, the beeper will sound twice
and the centerstand and steering
locks (if applied) will be released.
3. Confirm the indicator and warning light(s) come on for a few sec-
onds, and the go off. (See page
5-2.)TIPDo not start the engine if the mal-
function indicator light remains on.
 The ABS warning light should
come on and stay on until the ve-
hicle reaches a speed of 10 km/h
(6 mi/h).
NOTICE
ECA24110
If a warnin g or in dicator li ght does
not work as d escribed a bove, have a
Yamaha dealer check the vehicle.4. Close the throttle completely.
5. While applying the front or rear
brake, push the “ON/ ” switch.
6. Release the “ON/ ” switch when the engine starts, or after 5 sec-
onds. Wait 10 seconds before
pressing the switch again to allow
battery voltage to restore.NOTICE
ECA11043
For maximum en gine life, never ac-
celerate har d when the en gine is
col d!
EAU88780
TIPThis model is equipped with:
 a lean angle sensor. This sensor
stops the engine in case of a vehi-
cle turnover. If this happens, the
malfunction indicator light will
come on, but this is not a malfunc-
tion. Turn the vehicle power off
and then back on again to cancel
the indicator light. Failing to do so
will prevent the engine from start-
ing even though the engine will
crank when pushing the start
switch.
 an engine auto-stop system. The
engine stops automatically if left
idling for 20 minutes. If the engine
stops, simply push the start
switch to restart the engine.
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Periodic maintenance an d a djustment
8-8
8
EAU72781
TIPAir filters
 The engine air filter uses a disposable oil-coated paper el ement. This element cannot be cleaned with compressed air,
doing so will only damage it.
 If you often ride in the rain or in dusty areas, have the engine air filter and V-belt air filter elements serviced more fre-
quently.
Hydraulic brake service  Regularly check the brake fluid levels in the reservoirs, and refill as necessary.
 Replace the internal components of the brake master cylinders and calipers, and change the brake fluid every 2 years.
 Replace the brake hoses every 4 years, or sooner if cracked or damaged.30 *Throttle g
rip hous-
in g an d ca ble • Check operation and free play.
• Adjust the throttle cable free play
if necessary.
• Lubricate the throttle grip housing and cable. √√√√√
31 *Li
ghts, si gnals an d
switches • Check operation.
• Adjust headlight beam.
√√√√√√
NO. ITEM CHECK OR MAINTENANCE JOB
ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 10000 km
(6000 mi) 20000 km
(12000 mi) 30000 km
(18000 mi) 40000 km
(24000 mi)
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Periodic maintenance an d a djustment
8-11
8 To install the panel
Place the panel in the original position,
and then install the screws.
EAU19643
Checkin
g the spark plu gsThe spark plugs are important engine
components, which should be
checked periodically, preferably by a
Yamaha dealer. Since heat and depos- its will cause any spark plug to slowly
erode, they should be removed and
checked in accordance with the peri-
odic maintenance and lubrication
chart. In addition, the condition of the
spark plugs can reveal the condition of
the engine.
The porcelain insulator around the
center electrode of each spark plug
should be a medium-to-light tan (the
ideal color when the vehicle is ridden
normally), and all spark plugs installed
in the engine should have the same
color. If any spark plug shows a dis-
tinctly different color, the engine could
be operating improperly. Do not at-
tempt to diagnose such problems
yourself. Instead, have a Yamaha deal-
er check the vehicle.
If a spark plug shows signs of elec-
trode erosion and excessive carbon or
other deposits, it should be replaced. Before installing a spark plug, the
spark plug gap should be measured
with a wire thickness gauge and, if
necessary, adjusted to specification.
Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the spark
plug threads.
1. Screw
2. Panel C
1
2
Specifie d spark plu g:
NGK/LMAR7G1. Spark plug gapSpark plu g g ap:
0.7–0.8 mm (0.028–0.031 in)
Ti ghtenin g torque:
Spark plug: 13 N·m (1.3 kgf·m, 9.6 lb·ft)
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Periodic maintenance an d a djustment
8-12
8
TIPIf a torque wrench is not available
when installing a spark plug, a good
estimate of the correct torque is 1/4–
1/2 turn past finger tight. However, the
spark plug should be tightened to the
specified torque as soon as possible.
EAU36112
CanisterThis model is equipped with a canister
to prevent the discharging of fuel vapor
into the atmosphere. Before operating
this vehicle, make sure to check the
following:
 Check each hose connection.
 Check each hose and canister for
cracks or damage. Replace if
damaged.
 Make sure that the canister
breather is not blocked, and if
necessary, clean it.
EAU77364
Engine oil an d oil filter car-
tri dgeThe engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil filter car-
tridge replaced at the intervals speci-
fied in the periodic maintenance and
lubrication chart.
To check the en gine oil level
1. Place the vehicle on the center- stand. A slight tilt to the side can
result in a false reading.
2. Start the engine, warm it up for two minutes, and then turn it off.
3. Wait two minutes until the oil level settles.
4. Check the oil level through the check window located at the bot-
tom-left side of the crankcase.TIPThe engine oil should be between the
minimum and maximum level marks.
1. Canister
2. Canister breather
12
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