check engine TOYOTA GR YARIS 2021 Owner's Guide

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6-4. Do-it-yourself maintenance
Maintenance and care
1Turn the engine switch off.
2 Open the fuse box cover.
Engine compartment
Push the tabs in and lift the lid off.
Luggage compartment
Remove the deck board. (→P.241)
Remove the auxiliary box and then
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 con-
trol.
●Do not bend either of the battery
terminals.
Checking and replacing
fuses
If any of the electrical compo-
nents do not operate, a fuse
may have blown. If this hap-
pens, check and replace the
fuses as necessary.
Checking and replacing
fuses

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7-2. Steps to take in an emergency
ble.
■Electric power steering system
warning light (warning buzzer)
When the battery charge becomes insufficient or the voltage temporarily
drops, the electric power steering sys- tem warning light may come on and the warning buzzer may sound.
■When the tire pressure warning
light comes on
Inspect the tires to check if a tire is punctured.
If a tire is punctured: →P. 3 2 5
If none of the tires are punctured: Turn the engine switch off then turn it to
ON. Check if the tire pressure warning light comes on or blinks.
If the tire pressure warning light blinks
for approximately 1 minute then stays on
There may be a malfunction in the tire
pressure warning system. Have the vehicle inspected by any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer immedi- ately.
If the tire pressure warning light
comes on
1 After the temperature of the tires has lowered sufficiently, check the infla-tion pressure of each tire and adjust
them to the specified level.
2 If the warning light does not turn off even after several minutes have elapsed, check that the inflation
pressure of each tire is at the speci- fied level and perform initialization. ( →P.282)
■The tire pressure warning light may
come on due to natural causes
The tire pressure warning light may come on due to natural causes such as
natural air leaks and tire inflation pres- sure changes caused by temperature. In this case, adjusting the tire inflation
pressure will turn off the warning light (after a few minutes).
■Conditions that the tire pressure
warning system may not function properly
→ P. 2 8 0
WARNING
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place
immediately and contact any autho- rized Toyota retailer or Toyota autho-rized repairer, or any reliable repairer.
The vehicle will become extremely unstable during braking, and the ABS system may fail, which could cause
an accident resulting in death or seri- ous injury.
■When the electric power steer-ing system warning light comes on
When the light comes on yellow, the assist to the power steering is restricted. When the light comes on
red, the assist to the power steering is lost and handling operations of the steering wheel become extremely
heavy. When steering wheel operations are heavier than usual, grip the steering
wheel firmly and operate it using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following pre-
cautions. Failure to do so could cause a loss of vehicle control and result in death or
serious injury.
●Stop your vehicle in a safe place as
soon as possible. Adjust the tire inflation pressure immediately.
●Avoid abrupt maneuvering and braking.If the vehicle tires deteriorate, you
could lose control of the steering wheel or the brakes.

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7-2. Steps to take in an emergency
When trouble arises
■Warning messages
The warning messages explained below
may differ from the actual messages according to operation conditions and vehicle specifications.
■Warning buzzer
A buzzer may sound when a message is displayed.The buzzer may not be audible if the
vehicle is in a noisy location or if the audio system volume is high.
■If “Engine Oil Level Low Add or Replace” is displayed
The engine oil level is low. Check the
WARNING
■If a blowout or sudden air leak- age should occur
The tire pressure warning system may not activate immediately.
NOTICE
■To ensure the tire pressure warn-
ing system operates properly
Do not install tires with different speci- fications or makers, as the tire pres-
sure warning system may not operate properly.
If a warning message is
displayed
The multi-information display
shows warnings for system
malfunctions and incorrectly
performed operations, and
messages that indicate a need
for maintenance. When a mes-
sage is displayed, perform the
appropriate corrective action
for the message.
If a warning message is dis-
played again after the appro-
priate actions have been
performed, contact any autho-
rized Toyota retailer or Toyota
authorized repairer, or any reli-
able repairer.
Additionally, if a warning light
comes on or flashes at the
same time that a warning mes-
sage is displayed, take the
appropriate corrective action
for the warning light. ( →P.315)

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7-2. Steps to take in an emergency
level of the engine oil, and add if neces-
sary.
This message may appear if the vehicle is stopped on a slope. Move the vehicle
to a level surface and check to see if the message disappears.
■If “Engine Stopped Steering Power Low” is displayed
This message is displayed if the engine is stopped while driving.
When steering wheel operations are
heavier than usual, grip the steering wheel firmly and operate it using more force than usual.
■If “Avoid Excessive Acceleration
Due to Temperature” is displayed
This message may be displayed when driving such as the following:
●While warming up the engine
●Continuously driving at extremely high load
Drive the vehicle for a while, while
avoiding extremely high load conditions.
■If “Auto Power OFF to Conserve Battery” is displayed
Power was cut off due to the automatic
power off function. Next time when start- ing the engine, increase the engine speed slightly and maintain that level for
approximately 5 minutes to recharge the battery.
■If “Headlight System Malfunction Visit Your Dealer” is displayed
The following systems may be malfunc- tioning. Have the vehicle inspected by any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer immediately.
●The LED headlight system
●Automatic High Beam (if equipped)
■If a message that indicates the mal-
function of front camera is dis- played
The following systems may be sus-
pended until the problem shown in the message is resolved. ( →P.158, 315)
●PCS (Pre-Collision system) (if
equipped)
●LTA (Lane Tracing Assist) (if
equipped)
●Automatic High Beam (if equipped)
●RSA (Road Sign Assist) (if equipped)
●Dynamic radar cruise control (if equipped)
■If a message that indicates the mal-function of radar sensor is dis-
played
The following systems may be sus- pended until the problem shown in the
message is resolved. ( →P.158, 315)
●PCS (Pre-Collision system) (if
equipped)
●LTA (Lane Tracing Assist) (if
equipped)
●Dynamic radar cruise control (if
equipped)
■If “Radar Cruise Control Unavail- able See Owner’s Manual” is dis-played (if equipped)
The dynamic radar cruise control sys- tem is suspended temporarily or until the problem shown in the message is
resolved. (causes and coping methods: → P.158)
■If “Radar Cruise Control Unavail- able” is displayed (if equipped)
The dynamic radar cruise control sys- tem cannot be used temporarily. Use the system when it becomes available
again.
■If a message that indicates the need for visiting your Toyota dealer is displayed
The system or part shown on the multi- information display is malfunctioning. Have the vehicle inspected by any
authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer immediately.

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7-2. Steps to take in an emergency
zStop the vehicle in a safe place
on a hard, flat surface.
z Set the parking brake.
z Shift the shift lever to N.
z Stop the engine.
z Turn on the emergency flashers.
( →P.306)
z Check the degree of the tire
damage.
Do not remove the nail or screw
from the tire. Removing the object
may widen the opening and make
emergency repair with the repair kit
impossible.
■A flat tire that cannot be repaired with the emergency tire puncture
repair kit
In the following cases, the tire cannot be repaired with the emergency tire punc-
ture repair kit. Contact any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
●When the tire is damaged due to driv-
ing without sufficient air pressure
●When there are any cracks or damage
at any location on the tire, such as on the side wall, except the tread
●When the tire is visibly separated from the wheel
●When the cut or damage to the tread
is 4 mm (0.16 in.) long or more
●When the wheel is damaged
●When two or more tires have been punctured
●When more than 2 sharp objects such as nails or screws have passed
through the tread on a single tire
●When the sealant has expired
Before repairing the tire

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7-2. Steps to take in an emergency
When trouble arises
8Connect the power plug to the
power outlet socket. ( →P.244)
9 Attach the sticker provided with
the tire puncture repair kit to a
position easily seen from the
driver’s seat.
10 Check the specified tire inflation
pressure.
Tire inflation pressure is specified on the label on the driver’s side door frame
as shown. ( →P.357)
Left-hand drive vehicles
Right-hand drive vehicles
11 Start the vehicle’s engine.
12 To inject the sealant and inflate
the tire, turn the compressor
switch on.

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7-2. Steps to take in an emergency
interim measure to start the engine
if the engine switch is functioning
normally.
Do not use this starting procedure
except in case of emergency.
1 Set the parking brake.
2 Check that the shift lever is in N.
3 Turn the engine switch to ACC.
4 Press and hold the engine
switch for about 15 seconds
while depressing the clutch
pedal firmly.
Even if the engine can be started using
the above steps, the system may be
malfunctioning. Have the vehicle
inspected by any authorized Toyota
retailer or Toyota authorized repairer, or
any reliable repairer.
If you lose your keys
New genuine keys can be
made by any authorized Toyota
retailer or Toyota authorized
repairer, or any reliable
repairer using the other
mechanical key and the key
number stamped on your key
number plate.
Keep the plate in a safe place
such as your wallet, not in the
vehicle.
NOTICE
■When an electronic key is lost
If the electronic key remains lost, the
risk of vehicle theft increases signifi- cantly. Visit any authorized Toyota retailer or Toyota authorized repairer,
or any reliable repairer immediately with all remaining electronic keys that were provided with your vehicle.

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7-2. Steps to take in an emergency
When trouble arises
■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.361)
●Check if battery-saving mode is set. If it is set, cancel the function. ( →P. 1 1 0 )
Use the mechanical key (→P.101)
in order to perform the following
operations:
1 Locks all the doors
2 Unlocks all the doors
■Key linked functions
1 Closes the windows (turn and hold)*
2Opens the windows (turn and hold)*
*: These settings must be customized at
any authorized Toyota retailer or
Toyota authorized repairer, or any reli-
able repairer.
If the electronic key
does not operate prop-
erly
If communication between the
electronic key and vehicle is
interrupted ( →P.110) 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 can
be started by following the pro-
cedure below.
NOTICE
■In case of a smart entry & start
system malfunction or other key- related problems
Take your vehicle with all the elec-
tronic keys provided with your vehicle to any authorized Toyota retailer or Toyota authorized repairer, or any reli-
able repairer.
Locking and unlocking the
doors
WARNING
■When using the mechanical key and operating the power win-dows
Operate the power window after checking to make sure that there is no possibility of any passenger having
any of their body parts caught in the window.Also, do not allow children to operate
the mechanical key. It is possible for children and other passengers to get caught in the power window.

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7-2. Steps to take in an emergency
1Shift the shift lever to N and
depress the clutch pedal.
2 Touch the area behind the lock
button and unlock button on the
electronic key to the engine
switch.
When the electronic key is detected, a
buzzer sounds and the engine switch will turn to ON.
When the smart entry & start system is
deactivated in customization setting, the engine switch will turn to ACC.
3 Firmly depress the clutch pedal
and check that is shown
on the multi-information display.
4 Press the engine switch shortly
and firmly.
In the event that the engine still
cannot be started, contact any
authorized Toyota retailer or Toyota
authorized repairer, or any reliable
repairer.
■Stopping the engine
Shift the shift lever to N and press the engine switch as you normally do when
stopping the engine.
■Electronic 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.295)
■Alarm (if equipped)
Using the mechanical key to lock the
doors will not set the alarm system. If a door is unlocked using the mechani-cal key when the alarm system is set,
the alarm may be triggered. ( →P. 7 4 )
■Changing engine switch modes
Release the clutch pedal and press the engine switch in step 3 above.
The engine does not start and modes will be changed each time the switch is pressed. ( →P.138)
Starting the engine

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7-2. Steps to take in an emergency
When trouble arises
ning at a low speed for an extended
period, such as in heavy traffic.
■When the battery is removed or dis- charged
●Information stored in the ECU is cleared. When the battery is depleted, have the vehicle inspected at any
authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer.
●Some systems may require initializa-tion. ( →P.369)
■When removing the battery termi-
nals
When the battery terminals are removed, the information stored in the
ECU is cleared. Before removing the battery terminals, contact any autho-rized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
■Charging the battery
The electricity stored in the battery will discharge gradually even when the vehi-
cle is not in use, due to natural dis- charge and the draining effects of certain electrical appliances. If the vehi-
cle is left for a long time, the battery may discharge, and the engine may be unable to start. (The battery recharges
automatically during driving.)
■When recharging or replacing the battery
●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 mal-function.
●The engine switch mode is memo-rized by the vehicle. When the battery
is reconnected, the system will return to the mode it was in before the bat-tery was discharged. Before discon-
necting the battery, turn the engine
switch off. If you are unsure what mode the engine switch was in before the bat-
tery discharged, be especially careful when reconnecting the battery.
■When replacing the battery
●Use a genuine battery specifically designed for use with the Stop & Start system or a battery with equivalent
specifications to a genuine battery. If an unsupported battery is used, Stop & Start system functions may be
restricted to protect the battery. Also, battery performance may decrease and the engine may not be able to
restart. Contact any authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer for details.
●Use a battery that conforms to Euro-pean regulations.
●Use a battery that the case size is same as the previous one, 20 hour
rate capacity (20HR) is equivalent or greater, and performance rating (CCA) is equivalent or greater. Check
the label on top of the battery for the battery size and specifications (ex. LN3, 65Ah, 600A).
• If the sizes differ, the battery cannot be properly secured.• If the 20 hour rate capacity is low,
even if the time period where the vehi- cle is not used is a short time, the bat-tery may discharge and the engine
may not be able to start.
●Use a ventilation type calcium battery
●After replacing, firmly attach the fol- lowing items to the exhaust hole of the
battery. • Use the exhaust hose that was attached to the battery before replac-
ing and confirm that it is firmly con- nected to the hole section of the vehicle.
• Use the exhaust hole plug included with the battery replaced or the one installed on the battery prior to the
replacement. (Depending on the bat- tery to be replaced, the exhaust hole