Page 501 of 700
501
4-3. Do-it-yourself maintenance
4
Maintenance and care
YARIS_F (including HV)_WE_52D27E
Wireless remote control/electronic key batter y
Replace the battery with a new one if it is depleted.
You will need the following items:
Flathead screwdriver
Lithium battery CR2016 (vehicles without a smart entry & start
system or a push-button start system), or CR2032 (vehicles
with a smart entry & start system or a push-button start sys-
tem)
Replacing the wireless remote control battery
Remove the cover.
To prevent damage to the key,
cover the tip of the screwdriver
with a tape.
Remove the module.
Page 502 of 700
502 4-3. Do-it-yourself maintenance
YARIS_F (including HV)_WE_52D27E
Remove the battery cover and
the depleted battery.
Insert a new battery with the
“+” terminal facing up.
Replacing the electronic key battery
Ty p e A
Take out the mechanical key.
Remove the cover.
To prevent damage to the key,
cover the tip of the screwdriver
with a tape.
Page 503 of 700
503 4-3. Do-it-yourself maintenance
4
Maintenance and care
YARIS_F (including HV)_WE_52D27E
Remove the depleted battery.
Insert a new battery with the
“+” terminal facing up.
Ty p e B
Take out the mechanical key.
Remove the cover.
To prevent damage to the key,
cover the tip of the screwdriver
with a tape.
Page 504 of 700
504 4-3. Do-it-yourself maintenance
YARIS_F (including HV)_WE_52D27E
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 547 of 700

5When trouble arises
547
YARIS_F (including HV)_WE_52D27E
5-1. Essential information
Emergency flashers .......... 548
If your vehicle needs
to be towed ..................... 549
If you think something is
wrong .............................. 559
Fuel pump shut off system
(except hybrid vehicle
[gasoline engine only]).... 560
5-2. Steps to take in an
emergency
If a warning light turns on
or a warning buzzer
sounds... ........................ 561
If you have a flat tire
(vehicles with a spare
tire) ................................. 578
If you have a flat tire
(vehicles with
an emergency tire
puncture repair kit).......... 591
If the engine will not start
(except hybrid vehicle).... 608
If the hybrid system will
not start
(hybrid vehicle) ............... 611
If the shift lever cannot
be shifted from P (vehicles
with a hybrid transmission
or a Multidrive) ................ 613If the shift lever cannot be
shifted (vehicles with
a multi-mode manual
transmission) .................. 614
If you lose your keys ......... 615
If the electronic key does
not operate properly ....... 616
If the vehicle battery is
discharged (except
hybrid vehicle) ................ 621
If the vehicle’s 12-volt
battery is discharged
(hybrid vehicle) ............... 628
If your vehicle overheats
(except hybrid vehicle).... 632
If your vehicle overheats
(hybrid vehicle) ............... 636
If you run out of fuel and
the engine stalls
(diesel engine only) ........ 641
If the vehicle becomes
stuck ............................... 644
If your vehicle has to be
stopped in
an emergency ................. 647
Page 574 of 700
574 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52D27E
Once(Flashes
in yellow
for 15
sec-
onds.)Smart entry & start system
indicator light
Indicates that the electronic
key is not present when
attempting to start the
engine.Confirm the
location of the
electronic key.
9 times
(Flashes
in
yellow)Smart entry & start system
indicator light
An attempt was made to
drive when the regular key
was not inside the vehicle.Confirm that the
electronic key is
inside the vehi-
cle.
Once(Flashes
in yel-
low for
15 sec-
onds.)Smart entry & start system
indicator light
Indicates that the electronic
key battery is low.Replace the
battery.
(P. 501)
Once(Flashes
quickly
in green
for 15
sec-
onds.)Smart entry & start system
indicator light
Indicates that the steering
lock has not been released.Release the
steering lock.
(P. 232)
Interior
buzzerExterior
buzzerWarning
lightWarning light/DetailsCorrection
procedure
Page 611 of 700

5
611
5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52D27E
If the hybrid system will not start (hybrid vehicle)
Reasons for the hybrid system not starting vary depending on the
situation. Check the following and perform the appropriate proce-
dure:
The hybrid system will not start even though the correct
starting procedure is being followed. (P. 236, 241)
One of the following may be the cause of the problem:
Vehicles with an electronic key: The electronic key may not be
functioning properly. (P. 619)
There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle. (P. 151)
There may be a malfunction in the immobilizer system.
(P. 155)
There may be a malfunction in the steering lock system.
The hybrid system may be malfunctioning due to an electrical
problem such as an open circuit or a blown fuse. However,
depending on the type of malfunction, an interim measure is
available to start the hybrid system. (P. 612)
The interior lights and headlights are dim, or the horn does
not sound or sounds at a low volume.
One of the following may be the cause of the problem:
The 12-volt battery may be discharged. (P. 628)
The 12-volt battery terminal connections may be loose or cor-
roded.
Page 612 of 700

612 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52D27E
Emergency start function (vehicles with an electronic key)
When the hybrid system does not start, the following steps can be
used as an interim measure to start the hybrid system if the
“POWER” switch is functioning normally:
Shift the shift lever to P.
Set the parking brake.
Turn the “POWER” switch to ACCESSORY mode.
Press and hold the “POWER” switch for about 15 seconds
while depressing the brake pedal firmly.
Even if the hybrid system can be started using the above steps, the
system may be malfunctioning. Have the vehicle inspected by any
authorized Toyota dealer or repairer, or another duly qualified and
equipped professional.
The Interior lights and headlights do not turn on, or the horn
does not sound.
One of the following may be the cause of the problem:
One or both of the 12-volt battery terminals may be discon-
nected.
The 12-volt battery may be discharged. (P. 628)
Contact any authorized Toyota dealer or repairer, or another duly
qualified and equipped professional if the problem cannot be repaired,
or if repair procedures are unknown.