Page 508 of 704
508 4-3. Do-it-yourself maintenance
YARIS_F (including HV)_WE_52C79E
Use a CR2016 (vehicles without a smart entry & start system or a push-
button start system) or CR2032 (vehicles with a smart entry & start sys-
tem or a push-button start system) lithium battery
Batteries can be purchased at any authorized Toyota dealer or repairer,
or another duly qualified and equipped professional, local electrical appli-
ance shops or camera stores.
Replace only with the same or equivalent type recommended by the
manufacturer.
Dispose of used batteries according to local laws.
If the key battery is depleted
The following symptoms may occur:
The smart entry & start system (if equipped), push-button start system (if
equipped) and wireless remote control will not function properly.
The operational range will be reduced.
Remove the battery cover.
Remove the depleted battery.
Insert a new battery with the
“+” terminal facing up.
Page 509 of 704
509 4-3. Do-it-yourself maintenance
4
Maintenance and care
YARIS_F (including HV)_WE_52C79E
CAUTION
Removed battery and other parts
Keep away from children. These parts are small and if swallowed by a child,
they can cause choking. Failure to do so could result in death or serious
injury.
Certification for the lithium battery
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT
TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUC-
TIONS
NOTICE
For normal operation after replacing the battery
Observe the following precautions to prevent accidents:
Always work with dry hands.
Moisture may cause the battery to rust.
Do not touch or move any other component inside the remote control.
Do not bend either of the battery terminals.
Page 521 of 704

521 4-3. Do-it-yourself maintenance
4
Maintenance and care
YARIS_F (including HV)_WE_52C79E
*1: Gasoline engine
*2: Diesel engine
*3: Vehicles with a 1NR-FE engine equipped with a Stop & Start system 23 STR LOCK 20 A Steering lock system
24 ECU-B NO.1 5 AMain body ECU, smart entry & start
system
25 DOME 15 A Interior lights, audio system, VSC
26 ETCS 10 AMultiport fuel injection system/
sequential multiport fuel injection
system
27 HAZ 10 A Turn signal lights
28 AM2 7.5 AMultiport fuel injection system/
sequential multiport fuel injection
system, smart entry & start system,
stop & start system, starting sys-
tem, multi-mode manual transmis-
sion
29 ECU-B NO.2 5 AGauge and meters, power door
lock, wireless remote control, Stop
& Start system, smart entry & start
system, multi-mode manual trans-
mission, air conditioning system
30 ALT-S 7.5 A
31 R/I 50 AEFI MAIN, ECD MAIN, EFI NO.2,
EFI NO.3, IG2, IGN, MET, HORN
32 SPARE 20 A Spare fuse
33 SPARE 30 A Spare fuse
34 MIR-HTR 10 A Outside rear view mirror defogger
35 ID/UP 7.5 AMultiport fuel injection system/
sequential multiport fuel injection
system
FuseAmpereCircuit
Page 619 of 704
5
619
5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
If the electronic key does not operate properly
Unlocking and locking the doors
Use the mechanical key (P. 66)
in order to perform the following
operations:
Unlocks all the doors
Locks all the doors
Starting the hybrid system (hybrid vehicle)
Vehicles with a hybrid transmission
Ensure that the shift lever is in P and firmly depress the brake
pedal.
: If equipped
If communication between the electronic key and vehicle is inter-
rupted (P. 78) or the electronic key cannot be used because the
battery is depleted, the smart entry & start system and wireless
remote control cannot be used. In such cases, the doors can be
opened and the engine (except hybrid vehicle) or hybrid system
(hybrid vehicle) can be started by following the procedure below.
Page 623 of 704

5
623 5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
Stopping the engine (except hybrid vehicle)
Vehicles with a Multidrive: Shift the shift lever to P and press the “ENGINE
START STOP” switch as you normally do when stopping the engine.
Except vehicles with a Multidrive: Shift the shift lever to N and press the
“ENGINE START STOP” switch as you normally do when stopping the
engine.
Stopping the hybrid system (hybrid vehicle)
Shift the shift lever to P and press the “POWER” switch as you normally do
when stopping the hybrid system.
Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
(P. 505)
If the doors cannot be locked or unlocked by the smart entry & start
system
Lock and unlock the doors by the mechanical key or wireless remote control.
When the electronic key does not work properly
Make sure that the smart entry & start system has not been deactivated in
the customization setting. If it is off, turn the function on.
(Customizable features P. 682)
Page 628 of 704

628 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52C79E
Starting the engine when the battery is discharged (vehicles with a
Multidrive)
The engine cannot be started by push-starting.
To prevent battery discharge
Turn off the headlights and the audio system while the engine is off.
Turn off any unnecessary electrical components when the vehicle is run-
ning at a low speed for an extended period, such as in heavy traffic.
Charging the battery
The electricity stored in the battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of cer-
tain electrical appliances. If the vehicle is left for a long time, the battery may
discharge, and the engine may be unable to start. (The battery recharges
automatically during driving.)
Precautions when the battery is discharged (vehicles with a smart
entry & start system)
In some cases, it may not be possible to unlock the doors using the smart
entry & start system when the battery is discharged. Use the wireless
remote control or the mechanical key to lock or unlock the doors.
The engine may not start on the first attempt after the battery has
recharged but will start normally after the second attempt. This is not a
malfunction.
The “ENGINE START STOP” switch mode is memorized by the vehicle.
When the battery is reconnected, the system will return to the mode it
was in before the battery was discharged. Before disconnecting the bat-
tery, turn the “ENGINE START STOP” switch off.
If you are unsure what mode the “ENGINE START STOP” switch was in
before the battery discharged, be especially careful when reconnecting
the battery.
Page 632 of 704

632 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52C79E
Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
To prevent 12-volt battery discharge
Turn off the headlights and the audio system while the hybrid system is
off.
Turn off any unnecessary electrical components when the vehicle is run-
ning at a low speed for an extended period, such as in heavy traffic.
Precautions when the 12-volt battery is discharged
In some cases, it may not be possible to unlock the doors using the smart
entry & start system immediately after the 12-volt battery has been dis-
connected and reconnected. Use the wireless remote control or the
mechanical key to lock or unlock the doors.
Open and close any of the doors of your vehicle with the
engine switch (vehicles without an electronic key) or
“POWER” switch (vehicles with an electronic key) off.
Maintain the engine speed of the second vehicle and start
the hybrid system of your vehicle by turning the engine
switch (vehicles without an electronic key) to “ON” position
or “POWER” switch (vehicles with an electronic key) to ON
mode.
Make sure the “READY” indicator comes on. If the indicator
does not come on, contact any authorized Toyota dealer or
repairer, or another duly qualified and equipped profes-
sional.
Once the hybrid system has started, remove the jumper
cables in the exact reverse order from which they were con-
nected.
Once the hybrid system starts, have the vehicle inspected at any
authorized Toyota dealer or repairer, or another duly qualified and
equipped professional as soon as possible.
Page 683 of 704
683 6-2. Customization
6
Vehicle specifications
YARIS_F (including HV)_WE_52C79E
Smart entry &
start system
(
P. 69)Number of permissi-
ble times of continu-
ous smart lock
(hybrid vehicle)Twice Unlimited — O
Push-button
start system
(
P. 94)Push-button start
systemON OFF — O
Wireless
remote control
(
P. 105)Wireless
remote control
(hybrid vehicle)ON OFF — O
Operation signal
(Emergency flashers)ON OFF — O
Time elapsed before
automatic door lock
function is activated
if door is not opened
after being unlocked30 seconds60 seconds
—O
120
seconds
Automatic
light control
system
(P. 293)Light sensor sensi-
tivityLevel 3 Level 1 to 5 O O
Lights
(
P. 293)Daytime running
light system
(if equipped)ON OFF O O
Time that the low
beam headlights are
on when the vehicle
is parked30 seconds60 seconds
—O 90 seconds
120
seconds
ItemFunctionDefault
settingCustomized
setting