2018 TOYOTA YARIS iA check engine

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YARIS iA_OM_OM99Q46z_(U)
4-1. Climate Control System
Operating Tips
• Operate the climate control system with the engine running.
• To prevent the battery from being discharged, do not leave the fan
control dial on for a long period of time with the ignition switched
ON when the engine is not running.
• Clear all obstructions such as leaves, snow and ice from the hood and the air inlet in the cowl grille to improve the system efficiency.
• Use the climate control system to defog the windows and dehumid- ify the air.
• The recirculate mode should be used when driving through tunnels or while in a traffic jam, or when you would like to shut off outside
air for quick cooling of the interior.
• Use the outside air position for v entilation or windshield defrosting.
• If the vehicle has been parked in di rect sunlight during hot weather,
open the windows to let warm air escape, then run the climate con-
trol system.
• Run the air conditioner about 10 mi nutes at least once a month to
keep internal parts lubricated.
• Have the air conditioner checked before the weather gets hot. Lack of refrigerant may make the air conditioner less efficient.
The refrigerant specifications
are indicated on a label
attached to the inside of the
engine compartment. Check
the label before refilling the
refrigerant. If the wrong type of
refrigerant is used, it could
result in a serious malfunction
of the air conditioner.
For details, consult your Toyota
dealer.
Label

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YARIS iA_OM_OM99Q46z_(U)
4-3. Bluetooth®
*1: Setting which detects the existence of a device external to the Bluetooth®
unit
Unable to perform pair-
ingThe Bluetooth® func-
tion and the Find Mode/
Visible setting
*1 on the
device may turn off
automatically after a
period of time has
elapsed depending on
the device.
Check whether the
Bluetooth® function
and the Find Mode/Vis-
ible setting
*1 on the
device are turned on
and pairing or recon-
nect.
Does not connect auto-
matically when starting
the engine
Automatically con-
nects, but then discon-
nects suddenly
Disconnects intermit-
tently
The device is in a loca-
tion in which radio
wave interference can
occur easily, such as
inside a bag in a rear
seat, in a rear pocket of
a pair of pants.
Move the device to a
location in which radio
wave interference is
less likely to occur.
Does not connect auto-
matically when starting
the engineThe pairing information
is updated when the
device OS is updated.
Perform pairing again.
SymptomCauseSolution method

4185-3. Owner Maintenance
YARIS iA_OM_OM99Q46z_(U)
WARNING
■Do not perform ma intenance work if you l ack sufficient knowledge and
experience or the proper tools an d equipment to do the work. Have
maintenance work done by a qualified technician
Performing maintenance work on a vehicle is dangerous if not done prop-
erly. You can be seriously injured while performing some maintenance pro-
cedures.
■ If you must run the engine while working under the hood, make certain
that you remove all jewelry (especially rings, bracelets, watches, and
necklaces) and all neckties, scarves, and similar loose clothing before
getting near the engine or coolin g fan which may turn on unexpectedly
Working under the hood with the engine running is dangerous. It becomes
even more dangerous when you wear jewelry or loose clothing.
Either can become entangled in moving parts and result in injury.
■ Switch the ignition to off and make sure the fan is not running
before attempting to work near the cooling fan
Working near the cooling fan when it is running is dangerous. The fan could
continue running indefinitely even if the engine has stopped and the engine
compartment temperature is high. You could be hit by the fan and seriously
injured.
■ Do not leave items in th e engine compartment
After you have finished checking or doing servicing in the engine compart-
ment, do not forget and leave items such as tools or rags in the engine com-
partment.
Tools or other items left in the engine compartment could cause engine
damage or a fire leading to an unexpected accident.

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YARIS iA_OM_OM99Q46z_(U)
6-5. Overheating
Overheating
If the high engine coolant temperature warning light turns on:Drive safely to the side of the road and park off the right-of-way.
Put a vehicle with an automatic tr ansaxle in park (P), a manual tran-
saxle in neutral.
Apply the parking brake.
Turn off the air conditioner.
Check whether coolant or steam is escaping from the engine com-
partment.
If steam is coming from the engine compartment
Do not go near the front of the vehicle. Stop the engine.
Wait until the steam dissipates, then open the hood and start the
engine.
If neither coolant nor steam is escaping
Open the hood and idle the engine until it cools.
Make sure the cooling fan is operating, then turn off the engine after
the temperature has decreased.
When cool, check the coolant level.
If it is low, look for coolant leaks from the radiator and hoses.
■If you find a leak or other damage , or if coolant is still leaking:
Stop the engine and call your Toyota dealer.
Cooling fan
Cooling system cap
Coolant reservoir
If the high engine coolant temperature warning light turns on,
the vehicle loses power, or you hear a loud knocking or pinging
noise, the engine is probably too hot.
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5026-7. Warning/Indicator Lights and Warning Sounds
YARIS iA_OM_OM99Q46z_(U)
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 LightThis warning light indicates low engine oil pressure.
If the light illuminates or the warning indication is dis-
played while driving:
Drive to the side of the road and park off the right-of-
way on level ground.
Turn off the engine and wait 5 minutes for the oil to
drain back into the oil pan.
Inspect the engine oil level P. 424. If it’s low, add the
appropriate amount of engine oil while being careful
not to overfill.
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.
SignalWarning
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5046-7. Warning/Indicator Lights and Warning Sounds
YARIS iA_OM_OM99Q46z_(U)
■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.

YARIS iA_OM_OM99Q46z_(U)
5056-7. Warning/Indicator Lights and Warning Sounds
6
If Trouble Arises
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.
Contact Your Toyota Dealer and Have Vehicle Inspected
SignalWarning
Master Warning Light
Vehicles with type B audio
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. 501.
Vehicles without type B audio
The light illuminates continuously if any one of the follow-
ing occurs. Consult your Toyota dealer.
• There is a malfunction in the battery management sys- tem.
• There is a malfunction in the brake switch.
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 LightIf 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:
• 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.
(if equipped)
Automatic Transaxle Warning LightThe light illuminates when the transaxle has a problem.

5066-7. Warning/Indicator Lights and Warning Sounds
YARIS iA_OM_OM99Q46z_(U)
■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.
(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
LightA 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.
(Flashing)
(if equipped)
Tire Pressure Monitoring System Warning Light
If the tire pressure monitoring system has a malfunc-
tion, the tire pressure warn ing 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.
(Red)
(Illuminate)
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. 146.
SignalWarning