IfTroubleArises -> 6-7. Warning/Indicator Lights and Warning Sounds for Your Toyota Yaris 4 Door Fourth Generation (2021-2026)

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6-7. Warning/Indicator Lights and Warning Sounds  
If a Warning Light Turns On or Flashes  
If any warning light turns on/flashes, take appropriate action for  
each light. There is no problem if the light turns off, however if  
the light does not turn off or turns on/flashes again, consult your  
Toyota dealer.  
The details for some warnings can be viewed on the center display.  
1
If the warning light is turned on, select the  
screen to display the applications screen.  
icon on the home  
2
3
4
Select “Vehicle Status Monitor”.  
Select “Warning Guidance” to display the current warnings.  
Select the applicable warning to view the warning details.  
Stop Vehicle in Safe Place Immediately  
If any of the following warning lights turns on, the system may have a  
malfunction. Stop the vehicle in a safe place immediately and contact  
your Toyota dealer.  
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Signal  
Warning  
Brake System Warning Light  
This warning has the following functions:  
• Parking brake warning/Warning light inspection  
The light illuminates when the parking brake is applied  
with the ignition switched to START or ON. It turns off  
when the parking brake is fully released.  
• Low brake fluid level warning  
If the brake warning light remains illuminated even  
though the parking brake is released, the brake fluid  
may be low or there could be a problem with the brake  
system. Park the vehicle in a safe place immediately  
and contact your Toyota dealer.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Signal  
Warning  
Electronic Brake Force Distribution System Warning  
If the electronic brake force distribution control unit deter-  
mines that some components are operating incorrectly,  
the control unit may illuminate the brake system warning  
light and the ABS warning light simultaneously. The prob-  
lem is likely to be the electronic brake force distribution  
system.  
Charging System Warning Light  
If the warning light illuminates while driving, it indicates a  
malfunction of the alternator or of the charging system.  
Drive to the side of the road and park off the right-of-way.  
Consult your Toyota dealer.  
Engine Oil Warning Light  
This warning light indicates low engine oil pressure.  
If the light illuminates or the warning indication is dis-  
played while driving:  
1
Drive to the side of the road and park off the right-of-  
way on level ground.  
2
Turn off the engine and wait 5 minutes for the oil to  
drain back into the oil pan.  
3
Inspect the engine oil level P. 397. If it’s low, add the  
appropriate amount of engine oil while being careful  
not to overfill.  
4
Start the engine and check the warning light.  
If the light remains illuminated even though the oil level is  
normal or after adding oil, stop the engine immediately  
and have your vehicle towed to your Toyota dealer.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Signal  
Warning  
High Engine Coolant Temperature Warning Light  
The light flashes when the engine coolant temperature is  
extremely high, and illuminates when the engine coolant  
temperature increases further.  
Handling Procedure:  
• Flashing light  
Drive slowly to reduce engine load until you can find a  
safe place to stop the vehicle and wait for the engine to  
cool down.  
(Red)  
• Illuminated light  
This indicates the possibility of overheating. Park the  
vehicle in a safe place immediately and stop the engine.  
Refer to Overheating P. 484.  
Power Steering Malfunction Indicator Light  
The light illuminates/flashes if the electric power steering  
has a malfunction.  
If the light illuminates/flashes, stop the vehicle in a safe  
place and do not operate the steering wheel. There is no  
problem if the light turns off after a while. Contact your  
Toyota dealer if the light illuminates/flashes continuously.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Power Steering Malfunction Indicator Light  
If the indicator light illuminates/flashes, the power steering will not operate  
normally. If this happens, the steering wheel can still be operated, however,  
the operation may feel heavy compared to normal, or the steering wheel  
could vibrate when turning.  
Repeatedly jerking the steering wheel left and right while the vehicle is  
stopped or moving extremely slowly will cause the power steering system to  
go into protective mode which will make the steering feel heavy, but this  
does not indicate a problem. If this occurs, park the vehicle safely and wait  
several minutes for the system to return to normal.  
WARNING  
Do not drive with the brake system warning light illuminated. Contact  
your Toyota dealer to have the brakes inspected as soon as possible  
Driving with the brake system warning light illuminated is dangerous. It indi-  
cates that your brakes may not work at all or that they could completely fail  
at any time. If this light remains illuminated, after checking that the parking  
brake is fully released, have the brakes inspected immediately.  
In addition, the effectiveness of the braking may diminish so you may need  
to depress the brake pedal more strongly than normal to stop the vehicle.  
Do not drive with both the ABS warning light and brake warning light  
illuminated. Have the vehicle towed to your Toyota dealer to have the  
brakes inspected as soon as possible  
Driving when the brake system warning light and ABS warning light are illu-  
minated simultaneously is dangerous.  
When both lights are illuminated, the rear wheels could lock more quickly in  
an emergency stop than under normal circumstances.  
NOTICE  
Charging System Warning Light  
Do not continue driving when the charging system warning light is illumi-  
nated because the engine could stop unexpectedly.  
Engine Oil Warning Light  
Do not run the engine if the oil pressure is low. Otherwise, it could result in  
extensive engine damage.  
Do not run the engine if the oil level is low. Otherwise, it could result in  
extensive engine damage.  
High Engine Coolant Temperature Warning Light  
Do not drive the vehicle with the high engine coolant temperature warning  
light illuminated. Otherwise, it could result in damage to the engine.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Contact Your Toyota Dealer and Have Vehicle Inspected  
If any of the following warning lights turns on/flashes, the system may  
have a malfunction. Contact your Toyota dealer to have your vehicle  
inspected.  
Signal  
Warning  
Master Warning Light  
The light turns on when the system has a malfunction.  
Operate the center display and verify the content.  
Refer to If a Warning Light Turns On or Flashes on P. 489.  
ABS Warning Light  
If the ABS warning light stays on while you’re driving, the  
ABS control unit has detected a system malfunction. If this  
occurs, your brakes will function normally as if the vehicle  
had no ABS.  
Should this happen, consult your Toyota dealer as soon as  
possible.  
Check Engine Light  
If this light illuminates while driving, the vehicle may have  
a problem. It is important to note the driving conditions  
when the light illuminated and consult your Toyota dealer.  
The check engine light may illuminate in the following  
cases:  
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• The fuel tank level being very low or approaching empty.  
• The engine’s electrical system has a problem.  
• The emission control system has a problem.  
• The fuel-filler cap is missing or not tightened securely.  
If the check engine light remains on, or it flashes continu-  
ously, do not drive at high speeds and consult your Toyota  
dealer as soon as possible.  
Automatic Transaxle Warning Light  
The light illuminates when the transaxle has a problem.  
(if equipped)  
(Illuminate)  
TCS/DSC Indicator Light  
If the light stays on, the TCS, DSC or the brake assist sys-  
tem may have a malfunction and they may not operate  
correctly. Take your vehicle to your Toyota dealer.  
Air Bag/Front Seat Belt Pretensioner System Warning  
Light  
A system malfunction is indicated if the warning light con-  
stantly flashes, constantly illuminates or does not illumi-  
nate at all when the ignition is switched ON. If any of these  
occur, consult your Toyota dealer as soon as possible.  
The system may not operate in an accident.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Signal  
Warning  
Tire Pressure Monitoring System Warning Light  
If the tire pressure monitoring system has a malfunc-  
tion, the tire pressure warning light flashes for about 1  
minute when the ignition is switched ON and then con-  
tinues illuminating. Have your vehicle checked by your  
Toyota dealer as soon as possible.  
(Flashing)  
(if equipped)  
KEY Warning Light  
If any malfunction occurs in the keyless entry system, it  
illuminates continuously.  
Refer to Emergency Operation for Starting the Engine on  
P. 162.  
(Red)  
(Illuminate)  
LED Headlight Warning Light  
This light illuminates if there is a malfunction in the LED  
headlight. Have your vehicle inspected by your Toyota  
dealer.  
(if equipped)  
ABS Warning Light  
When the engine is jump-started to charge the battery, uneven rpm occurs  
and the ABS warning light may illuminate. If this occurs, it is the result of the  
weak battery and does not indicate an ABS malfunction.  
Recharge the battery.  
The brake assist system does not operate while the ABS warning light is illu-  
minated.  
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6-7. Warning/Indicator Lights and Warning Sounds  
WARNING  
Never tamper with the air bag/pretensioner systems and always have  
your Toyota dealer perform all servicing and repairs  
Self-servicing or tampering with the systems is dangerous. An air bag/pre-  
tensioner could accidentally activate or become disabled causing serious  
injury or death.  
If the tire pressure monitoring system warning light illuminates or  
flashes, or the tire pressure warning beep sound is heard, decrease  
vehicle speed immediately and avoid sudden maneuvering and  
braking  
If the tire pressure monitoring system warning light illuminates or  
flashes, or the tire pressure warning beep sound is heard, it is danger-  
ous to drive the vehicle at high speeds, or perform sudden maneuvering  
or braking. Vehicle drivability could worsen and result in an accident.  
To determine if you have a slow leak or a flat, pull over to a safe position  
where you can check the visual condition of the tire and determine if you  
have enough air to proceed to a place where air may be added and the  
system monitored again by your Toyota dealer or a tire repair station.  
Do not ignore the TPMS Warning Light  
Ignoring the TPMS warning light is dangerous, even if you know why it  
is illuminated. Have the problem taken care of as soon as possible  
before it develops into a more serious situation that could lead to tire  
failure and a dangerous accident.  
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NOTICE  
Automatic Transaxle Warning Light  
If the automatic transaxle warning light illuminates, the transaxle has an  
electrical problem. Continuing to drive your Toyota in this condition could  
cause damage to your transaxle. Consult your Toyota dealer as soon as  
possible.  
KEY Warning Light  
If the key warning indicator light illuminates or the push button start indicator  
light (amber) flashes, the engine may not start. If the engine cannot be  
started, try starting it using the emergency operation for starting the engine,  
and have the vehicle inspected at your Toyota dealer as soon as possible.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Taking Action  
Take the appropriate action and verify that the warning light turns off.  
Signal  
Warning  
Action to be taken  
Low Fuel Warning Light  
The light turns on when the  
remaining fuel is about 2.3  
gal. (9.0 L, 1.9 Imp.gal.).  
Add fuel.  
Check Fuel Cap Warning  
Light  
Stop the engine and rein-  
If the check fuel cap warning stall the fuel-filler cap.  
light illuminates while driving, Refer to Refueling on  
the fuel-filler cap may not be P. 125  
installed properly.  
Seat Belt Warning Light  
The seat belt warning light  
turns on if the driver or front  
passenger’s seat is occupied  
and the seat belt is not fas-  
tened with the ignition  
switched ON.  
If the driver or front passen-  
ger’s seat belt is unfastened  
(only when the front passen-  
Fasten the seat belts.  
ger’s seat is occupied) and  
the vehicle is driven at a  
speed faster than about 12  
mph (20 km/h), the warning  
light flashes. After a short  
time, the warning light stops  
flashing, but remains illumi-  
nated.  
Door-Ajar Warning Light  
The light turns on if any door/ Close the door/trunk lid/  
trunk lid/liftgate is not closed liftgate securely.  
securely.  
Low Washer Fluid Level  
Warning Light  
Add washer fluid  
This warning light indicates  
(P. 402).  
that  
little  
washer  
fluid  
(if equipped)  
remains.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Signal  
Warning  
Action to be taken  
Tire Pressure Monitoring  
System Warning Light  
When the warning light illu-  
minates, and the warning  
beep sound is heard (about  
3 seconds), tire pressure is  
too low in one or more tires.  
Inspect the tires and  
adjust to the specified  
inflation pressure  
(Illuminate)  
(if equipped)  
(P. 413).  
Verify the reason why the  
warning light is illuminated  
on the center display  
(P. 489).  
Low Speed Pre-Collision Sys- If the reason why the  
tem Warning Light warning light is illuminated  
The light turns on if the wind- is due to a dirty wind-  
shield is dirty or there is a shield, clean the wind-  
(Amber)  
malfunction in the system.  
shield.  
For any other reasons,  
have  
the  
vehicle  
inspected at your Toyota  
dealer.  
KEY Warning Light  
Take the appropriate action and verify that the warning light turns  
off.  
6
Signal  
Cause  
Action to be taken  
Replace the key battery  
(P. 410).  
The smart key battery is dead.  
The smart key is not within the  
operation range.  
Bring the smart key into  
the operation range  
(P. 98).  
The smart key is placed in  
areas inside the cabin where it  
is difficult for the key to be  
detected.  
(Red)  
(Flashing)  
Take the key from another  
manufacturer similar to  
the smart key out of the  
operation range.  
A key from another manufac-  
turer similar to the smart key is  
in the operation range.  
Without the ignition switched  
off, the smart key is taken out of Bring the smart key back  
the cabin, and then all the into the cabin.  
doors are closed.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Low Fuel Warning Light  
The light illumination timing may vary because fuel inside the fuel tank moves  
around according to the driving conditions and the vehicle posture.  
Seat Belt Warning Light  
The warning light flashes for about 6 seconds if the driver’s seat belt is not  
fastened when the ignition is switched ON.  
To allow the front passenger occupant classification sensor to function prop-  
erly, do not place and sit on an additional seat cushion on the front passen-  
ger’s seat. The sensor may not function properly because the additional  
seat cushion could cause sensor interference.  
If a small child is seated on the front passenger’s seat, the warning light may  
not operate.  
Tire Pressure Monitoring System Warning Light  
Perform tire pressure adjustment when the tires are cold. Tire pressure  
will vary according to the tire temperature, therefore let the vehicle stand  
for 1 hour or only drive it 1 mile (1.6 km) or less before adjusting the tire  
pressures. When pressure is adjusted on hot tires to the cold inflation  
pressure, the TPMS warning light/beep may turn on after the tires cool  
and pressure drops below specification.  
Also, an illuminated TPMS warning light, resulting from the tire air pres-  
sure dropping due to cold ambient temperature will remain illuminated  
even if the ambient temperature rises. In this case, it will also be neces-  
sary to adjust the tire air pressures. If the TPMS warning light illuminates  
due to a drop in tire air pressure, make sure to check and adjust the tire  
air pressures.  
Tires lose air naturally over time and the TPMS cannot tell if the tires are  
getting too soft over time or you have a flat. However, when you find one  
low tire in a set of four-that is an indication of trouble; you should have  
someone drive the vehicle slowly forward so you can inspect any low  
tire for cuts and any metal objects sticking through tread or sidewall. Put  
a few drops of water in the valve stem to see if it bubbles indicating a  
bad valve. Leaks need to be addressed by more than simply reinflating  
the tire as leaks are dangerous - take it to your Toyota dealer.  
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6-7. Warning/Indicator Lights and Warning Sounds  
WARNING  
If the tire pressure monitoring system warning light illuminates or  
flashes, or the tire pressure warning beep sound is heard, decrease  
vehicle speed immediately and avoid sudden maneuvering and  
braking  
If the tire pressure monitoring system warning light illuminates or  
flashes, or the tire pressure warning beep sound is heard, it is danger-  
ous to drive the vehicle at high speeds, or perform sudden maneuvering  
or braking. Vehicle drivability could worsen and result in an accident.  
To determine if you have a slow leak or a flat, pull over to a safe position  
where you can check the visual condition of the tire and determine if you  
have enough air to proceed to a place where air may be added and the  
system monitored again by your Toyota dealer or a tire repair station.  
Do not ignore the TPMS Warning Light  
Ignoring the TPMS warning light is dangerous, even if you know why it  
is illuminated. Have the problem taken care of as soon as possible  
before it develops into a more serious situation that could lead to tire  
failure and a dangerous accident.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Message Indicated on Display  
If a message is displayed in the center display, take appropriate  
action (in a calm manner) according to the displayed message.  
Display example  
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6-7. Warning/Indicator Lights and Warning Sounds  
Stop Vehicle in Safe Place Immediately  
If the following messages are displayed in the center display, a vehicle  
system may be malfunctioning. Stop the vehicle in a safe place and  
contact your Toyota dealer.  
Display  
Indicated Condition  
Displays if the engine coolant  
temperature  
excessively.  
has  
increased  
Displays if the charging system  
has a malfunction.  
6
Verify Display Content  
Displays in the following cases:  
Indicated Condition/  
Action to be taken  
Display  
The following message is dis-  
played when the temperature  
around the center display is high.  
Lowering the temperature in the  
cabin or the temperature around  
the center display by avoiding  
direct sunlight is recommended.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Warning Sound is Activated  
Lights-On Reminder  
The lights-on reminder is operable when the time setting*1 of the auto  
headlight off function is off.  
If lights are on and the ignition is switched to ACC or the ignition is  
switched off, a continuous beep sound will be heard when the driver’s  
door is opened.  
*1: If the light switch is left on, the auto headlight off function automatically  
turns off the lights about 30 seconds after switching the ignition off. The  
time setting can be changed.  
Refer to Customizable Features on P. 555.  
When the ignition is switched to ACC, the “Ignition Not Switched Off (STOP)  
Warning Beep” (P. 504) overrides the lights-on reminder.  
A personalized function is available to change the sound volume for the  
lights-on reminder.  
Refer to Customizable Features on P. 555.  
Air Bag/Front Seat Belt Pretensioner System Warning Beep  
If there is a problem with the air bag/front seat belt pretensioner sys-  
tems and the warning light illumination, a warning beep sound will be  
heard for about 5 seconds every minute.  
The air bag and front seat belt pretensioner system warning beep  
sound will continue to be heard for approximately 35 minutes. Have  
your vehicle inspected at your Toyota dealer as soon as possible.  
WARNING  
Do not drive the vehicle with the air bag/front seat belt pretensioner  
system warning beep sounding  
Driving the vehicle with the air bag/front seat belt pretensioner system warn-  
ing beep sounding is dangerous. In a collision, the air bags and the front  
seat belt pretensioner system will not deploy and this could result in death  
or serious injury. Contact your Toyota dealer to have the vehicle inspected  
as soon as possible.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Seat Belt Warning Beep  
If the driver’s seat belt is not fastened when the ignition is switched  
ON, a beep sound will be heard for about 6 seconds. If the driver or  
the front passenger’s seat belt is not fastened and the vehicle is  
driven at a speed faster than about 12 mph (20 km/h), a beep sound  
will be heard again for a specified period of time.  
Until a seat belt is fastened or a given period of time has elapsed, the  
beep sound will not stop even if the vehicle speed falls below 12 mph  
(20 km/h).  
To allow the front passenger occupant classification sensor to function prop-  
erly, do not place and sit on an additional seat cushion on the front passen-  
ger’s seat. The sensor may not function properly because the additional  
seat cushion could cause sensor interference.  
If a small child is seated on the front passenger’s seat, the warning beep  
may not operate.  
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6-7. Warning/Indicator Lights and Warning Sounds  
Ignition Not Switched Off (STOP) Warning Beep  
If the driver’s door is opened while the ignition is switched to ACC, a  
continuous beep sound will be heard to notify the driver that the igni-  
tion has not been switched off (STOP). Left in this condition, the key-  
less entry system will not operate, the car cannot be locked, and the  
battery power will be depleted.  
Key Removed from Vehicle Warning Beep  
Vehicles with advanced keyless function  
If the key is taken out of the vehicle while the ignition is not  
switched OFF and all the doors are closed, the beep which sounds  
outside of the vehicle will be heard 6 times, the beep which sounds  
inside the vehicle will be heard 6 times.  
Vehicles without advanced keyless function  
If the key is taken out of the vehicle while the ignition is not  
switched OFF and all the doors are closed, a beep will be heard in  
the cabin 6 times.  
Because the key utilizes low-intensity radio waves, the Key Removed From  
Vehicle Warning may activate if the key is carried together with a metal object  
or it is placed in a poor signal reception area.  
Request Switch Inoperable Warning Beep (With the advanced  
keyless function)  
If the request switch is pressed with the door open or ajar, or the igni-  
tion is not switched OFF with a key being carried, a beep will be heard  
outside for about 2 seconds to notify the driver that the door or liftgate/  
trunk lid cannot be locked.  
Key Left-in-Compartment/trunk Warning Beep (With the  
advanced keyless function)  
If the key is left in the luggage compartment/trunk with all the doors  
locked and the liftgate/trunk lid closed, a beep will be heard outside for  
about 10 seconds to notify the driver that the key is in the luggage  
compartment/trunk. In this case, take out the key by pressing the elec-  
tric liftgate/trunk lid opener and opening the liftgate/trunk lid. The key  
taken out of the luggage compartment/trunk may not operate because  
its functions have been temporarily stopped. To restore the key’s func-  
tions, perform the applicable procedure (P. 98).  
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6-7. Warning/Indicator Lights and Warning Sounds  
Key Left-in-vehicle Warning Beep (With the advanced keyless  
function)  
If all the doors and luggage compartment/trunk are locked using  
another key while the key is left in the cabin, the beep which sounds  
outside of the vehicle will be heard for about 10 seconds to notify the  
driver that the key is in the cabin. In this case, take out the key by  
opening the door. A key taken out of the vehicle using this method  
may not operate because its functions have been temporarily  
stopped. To restore the key’s functions, perform the applicable proce-  
dure (P. 98).  
Tire Inflation Pressure Warning Beep (if equipped)  
The warning beep sound will be heard for about 3 seconds when  
there is any abnormality in tire inflation pressures (P. 241).  
Collision warning  
If there is the possibility of a collision with a vehicle ahead, the beep  
sounds continuously and a warning is indicated in the display.  
Power Steering Warning Buzzer  
6
If the power steering system has a malfunction, the power steering  
malfunction indicator light turns on or flashes and the buzzer operates  
at the same time.  
Refer to Stop Vehicle in Safe Place Immediately on P. 489.  
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