2021 YAMAHA NMAX 155 Owners Manual

Smart key system
3-7
3
2. Remove the battery.
TIPDispose of the removed battery in ac-
cordance with local regulations.3. Install a new battery as shown. Note the polarity of the battery. 4. Gently snap the smart key case
closed.
EAUN2100
Main switchThe main switch is used to turn the ve-
hicle power on and off, lock and unlock
the steering, and open the seat. After
pushing the main switch knob (and
confirmation with the smart key has
1. Battery
1
Specified b attery:
CR2032
1. Battery
1
1. Main switch knob
1. Smart key system indicator light Ž
1
1
UBBDE0E0.book Page 7 Wednesday, June 2, 2021 2:57 PM

Smart key system
3-8
3taken place), the main switch can be
turned while the smart key system indi-
cator light is on (approximately 4 sec-
onds).
WARNING
EWA18720
Never turn the main switch to
“OFF”, “ ”, or “OPEN” while the ve-
hicle is movin
g. Otherwise the elec-
trical systems will b e switched off,
which may result in loss of control or
an acci dent.TIPDo not push the main switch knob re-
peatedly or turn the main switch back
and forth excessively (beyond normal
use). To protect the main switch from
damage, the smart key system will
temporarily disable, and the smart key
system indicator light will flash. If this
occurs, wait until the indicator light
stops flashing, and then operate the
main switch.The main switch positions are de-
scribed below.
EAU76502
ON
All electrical circuits are supplied with
power, and the engine can be started.
To turn the vehicle power on1. Turn the smart key on and bring it
within operating range.
2. Push the main switch knob and the smart key indicator light will
come on for approximately 4 sec-
onds.
3. While the smart key system indi- cator light is on, turn the main
switch to “ON”. All of the turn sig-
nal lights will flash twice and the
vehicle power will turn on.
TIPIf the vehicle battery voltage is
low, the turn signal lights will not
flash.
 See “Emergency mode” on page
9-38 for information on turning the
vehicle power on without the
smart key.
EAU76511
OFF
All electrical systems are off.
To turn the vehicle power off1. With the smart key turned on and
within operating range, turn the
main switch to “OFF”.
1. Push.
2. Turn.1 2
1. Turn.
1
UBBDE0E0.book Page 8 Wednesday, June 2, 2021 2:57 PM

Smart key system
3-9
3
2. The turn signal lights flash once
and the vehicle power turns off.
TIPWhen the main switch is turned to

confirmed (the smart key is either out-
side operation range or has been
turned off), the beeper will sound for 3
seconds and the smart key system in-
dicator light will flash for 30 seconds. During this 30 seconds, the main
switch can be freely operated.
 After 30 seconds, the vehicle
power will turn off automatically.
 To turn the vehicle power off im-
mediately, push the main switch
knob four times within 2 seconds.
EAU76534
OPEN
The fuel tank cap lid and the seat can
be opened:
1. With the smart key on and within operating range, push the main
switch knob.
2. While the smart key system indi- cator light is on, turn the main
switch to “OPEN”. To open the fuel tank cap li
d
Push the “FUEL” button to open the
fuel tank cap lid.
After refueling, push the fuel tank cap
lid until it is closed.
TIP See page 6-14 for fuel tank cap re-
moval and installation procedures.To open the seat
Push the “SEAT” button, and then lift
the rear of the seat.
To close the seat, push down on the
rear to lock it in position.TIP Make sure that the seat is securely
closed before starting off.
 The seat can also be opened with
the mechanical key. (See page
6-19.)
1. Push.
2. Turn.
1. “FUEL” button1
2
1
1.
1
UBBDE0E0.book Page 9 Wednesday, June 2, 2021 2:57 PM

Smart key system
3-10
3Open position remin
der
To prevent you from accidentally leav-
ing the vehicle unlocked by walking
away with the main switch still in the
“OPEN” position, the smart key system
beeper will sound under the following
conditions.  When the main switch has been in
the open position for 3 minutes
 If the smart key is turned off while
the main switch is in the open po-
sition
 If you walk out of range of the
smart key system with the main
switch in the open position
If the beeper sounds after 3 minutes,
turn the main switch to “OFF” or “ ”. If
the beeper sounds because the smart
key was turned off or moved out of
range, turn the smart key on and walk
back into range.
TIP The beeper will turn off after 1
minute.
EAU76521
“ ” (lock)
The steering is locked and all electrical
systems are off.
To lock the steering1. Turn the handlebar all the way to
the left.
2. With the smart key turned on and within operating range, push the
main switch knob.
3. While the smart key system indi- cator light is on, push and turn the
main switch to “ ”.
TIPIf the steering will not lock, try turning
the handlebar back to the right slightly.To unlock the steering1. With the smart key turned on andwithin operating range, push the
main switch knob.
2. While the smart key system indi- cator light is on, push and turn the
main switch to the desired posi-
tion.
1. Push.
2. Turn.1 2
1. Push.
2. Turn.12
UBBDE0E0.book Page 10 Wednesday, June 2, 2021 2:57 PM

Stop and Start System
4-1
4
EAU76825
Stop an d Start SystemThe Stop and Start System stops the
engine automatically when the vehicle
is stopped in order to prevent noise,
control exhaust emissions, and reduce
fuel consumption.
When the rider turns the throttle grip
slightly, the engine restarts automati-
cally and the vehicle starts off.NOTICE
ECA23961
When parkin g the vehicle or leavin g
the vehicle unatten ded , be sure to
turn the main switch off. If the Stop
an d Start System is left turne d on,
the battery could become dis- char
ged an d it may not be possi ble
to restart the en gine due to insuffi-
cient battery volta ge.
TIP Although the engine normally
stops at the same time as the ve-
hicle, there may be a delay when
operating the vehicle under 10
km/h, such as in heavy traffic.
 If you think the battery voltage is
low because the engine cannot be
started using the starter switch or
for some other reason, do not turn
on the Stop and Start System.
 Have a Yamaha dealer check the
battery at the intervals specified in
the periodic maintenance chart.
EAU76671
Stop an d Start System opera-
tion
EAU76687
Activatin g the Stop an d Start Sys-
tem 1. Turn the main switch on.
2. Set the Stop and Start System switch to “ ”.
1. Stop and Start System indicator light “ ”
1
ON
A
AAA
UBBDE0E0.book Page 1 Wednesday, June 2, 2021 2:57 PM

Stop and Start System
4-2
4 3. The Stop and Start System acti-
vates and the indicator light
comes on when the following con-
ditions are met: The Stop and Start System
switch is set to “ ”.
 After the engine was warmed
up, the engine was left idling
for a certain period.
 The vehicle has traveled at a
speed of 10 km/h or higher.
4. To turn off the Stop and Start Sys- tem, set the Stop and Start Sys-
tem switch to “ ”.
TIPTo preserve battery power, the
Stop and Start System may not
activate.
 If the Stop and Start System does
not activate, have a Yamaha deal-
er check the battery.
EAU76832
Stop the en gine
The engine will stop automatically
when the following conditions are met:  The Stop and Start System switch
is set to “ ”.
 The “ ” indicator light on the
multi-function meter is on.
 The vehicle is stopped with the
throttle grip fully returned. At this time, the “ ” indicator light
starts flashing to indicate that the en-
gine is currently stopped by the Stop
and Start System.
EAU76704
Restart the en
gine
If the throttle grip is turned while the
Stop and Start System indicator light is
flashing, the engine will automatically
restart and the “ ” indicator light will
stop flashing.
1. On
A1
A
AAA
A
A
1. On
2. Flashing
A
1
2
A
UBBDE0E0.book Page 2 Wednesday, June 2, 2021 2:57 PM

Stop and Start System
4-3
4
WARNING
EWA18731
Do not turn the throttle g rip too
much or too quickly when the Stop
an d Start System is activate d an d
the en gine is stoppe d. Otherwise,
the vehicle coul d start movin g unex-
pected ly after the en gine restarts.
TIP When the sidestand is lowered,
the Stop and Start System is de-
activated.
 If the Stop and Start System does
not operate correctly, have a
Yamaha dealer check the vehicle.
EAU76711
Precautions when usin g the Stop
an d Start System
In order to prevent accidents due to
improper operation, carefully read and
observe the following precautions.
WARNING
EWA18741
When walkin g while pushin g the ve-
hicle, be sure to turn the main switch
off. If the vehicle is pushe d while the Stop an
d Start System is left turned
on, the en gine coul d start an d the
vehicle coul d start movin g if the
throttle grip is turne d acci dentally.
WARNING
EWA18751
When placin g the vehicle on the
centerstan d, be sure to turn the
main switch off. If the vehicle is
placed on the centerstand while the
Stop an d Start System is left turned
on, the en gine coul d start an d the
vehicle coul d start movin g if the
throttle grip is turne d acci dentally.
1. Flashing
2. Off
1
2
A
OFF
UBBDE0E0.book Page 3 Wednesday, June 2, 2021 2:57 PM

Stop and Start System
4-4
4
WARNING
EWA18771
 When leavin g the vehicle unat-
ten ded , b e sure to turn the main
switch off.
 Do not leave the Stop an d Start
System turne d on when parkin g
the vehicle. Otherwise, the en-
g ine coul d start an d the vehicle
coul d start movin g if the throttle
g rip is turne d acci dentally.
WARNING
EWA18781
Before performin g maintenance, b e
sure to turn the main switch off. If
maintenance is performed while the
Stop an d Start System is turne d on,
the en gine coul d start an d the vehi-
cle coul d start movin g if the throttle
g rip is turne d.
OFF
OFFOFF
UBBDE0E0.book Page 4 Wednesday, June 2, 2021 2:57 PM