WhenDriving -> 3-1. Start/Stop Engine for Your Toyota Yaris 4 Door Fourth Generation (2021-2026)

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3-1. Start/Stop Engine  
Ignition Switch  
Push Button Start Positions  
The system operates only when the driver is in the vehicle or within  
operational range while the key is being carried.  
Each time the push button start is  
pressed, the ignition switches in  
the order of off, ACC, and ON.  
Pressing the push button start  
Indicator light  
again from ON switches the igni-  
tion off.  
Push button start  
Off  
The power supply to electrical devices turns off and the push button  
start indicator light (amber) also turns off.  
In this position the steering wheel is locked.  
ACC (Accessory)  
Some electrical accessories will operate and the indicator light  
(amber) illuminates.  
ON  
This is the normal running position after the engine is started. The  
indicator light (amber) turns off. (The indicator light (amber) illumi-  
nates when the ignition is switched ON and the engine is not run-  
ning.)  
Some indicator lights/warning lights should be inspected before the  
engine is started (P. 173).  
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3-1. Start/Stop Engine  
Push Button Start Positions  
The engine starts by pressing the push button start while depressing the  
clutch pedal (manual transaxle) or the brake pedal (automatic transaxle). To  
switch the ignition position, press the push button start without depressing  
the pedal.  
Do not leave the ignition switched ON while the engine is not running. Doing  
so could result in the battery going dead. If the ignition is left in ACC (For  
automatic transaxle, the selector lever is in the P position, and the ignition is  
in ACC), the ignition switches off automatically after about 25 minutes.  
ACC (Accessory)  
The keyless entry system does not function while the push button start has  
been pressed to ACC, and the doors will not lock/unlock even if they have  
been locked manually.  
3
ON  
When the push button start is pressed to ON, the sound of the fuel pump  
motor operating near the fuel tank can be heard. This does not indicate an  
abnormality.  
WARNING  
Before leaving the driver’s seat, set the parking brake, make sure the  
selector lever is in 1st gear or R (manual transaxle) or in P (automatic  
transaxle), and always switch the ignition off  
Leaving the driver’s seat without setting the parking brake, shifting the  
selector lever to 1st gear or R (manual transaxle) or to P (automatic tran-  
saxle), and switching the ignition off is dangerous. Unexpected vehicle  
movement could occur which could result in an accident.  
In addition, if your intention is to leave the vehicle for even a short period, it  
is important to switch the ignition off, as leaving it in another position will dis-  
able some of the vehicle’s security systems and run the battery down.  
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3-1. Start/Stop Engine  
Starting the Engine  
1
Make sure you are carrying the key.  
2
Occupants should fasten their seat belts.  
3
Make sure the parking brake is on.  
4
Continue to press the brake pedal firmly until the engine has com-  
pletely started.  
5
Manual transaxle:  
Continue to press the clutch pedal firmly until the engine has com-  
pletely started.  
The starter will not operate if the clutch pedal is not depressed sufficiently.  
Automatic transaxle:  
Put the vehicle in park (P). If you must restart the engine while the  
vehicle is moving, shift into neutral (N).  
The starter will not operate if the selector lever is not in P or N and the  
brake pedal is not depressed sufficiently.  
6
Verify that the KEY indicator  
light (green) in the combination  
meter and the push button start  
indicator light (green) illumi-  
nate.  
If the push button start indicator  
light (green) flashes, make sure  
that the key is being carried.  
If the push button start indicator  
light (green) flashes with the key  
being carried, touch the key to the  
push button start and start the  
engine. Refer to Engine Start Func-  
Indicator light  
tion When Key Battery is Dead on  
P. 161.  
Push button start  
7
Press the push button start after both the KEY indicator light  
(green) in the combination meter and the push button start indicator  
light (green) illuminate.  
After starting the engine, the push button start indicator light (amber) turns  
off and the ignition switches to the ON position.  
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3-1. Start/Stop Engine  
8
After starting the engine, let it idle for about ten seconds.  
The key must be carried because the key carries an immobilizer chip that  
must communicate with the engine controls at short range.  
The engine can be started when the push button start is pressed from off,  
ACC, or ON.  
The push button start system functions (function which can start the engine  
by only carrying the key) can be deactivated to prevent any possible  
adverse effect on a user wearing a pacemaker or other medical device. If  
the system is deactivated, you will be unable to start the engine by carrying  
the key. Consult your Toyota dealer for details. If the push button start sys-  
tem functions have been deactivated, you can start the engine by following  
the procedure indicated when the key battery goes dead.  
Refer to Engine Start Function When Key Battery is Dead on P. 161.  
3
After starting a cold engine, the engine speed increases and a whining  
sound from the engine compartment can be heard.  
This is for improved exhaust gas purification and does not indicate defect of  
the parts.  
Engine-starting is controlled by the spark ignition system.  
This system meets all Canadian Interference-Causing Equipment Standard  
requirements regulating the impulse electrical field strength of radio noise.  
Under the following conditions, the KEY warning light (red) flashes after the  
push button start is pressed to inform the driver that the push button start  
will not switch to ACC even if it is pressed from off.  
• The key battery is dead.  
• The key is out of operational range.  
• The key is placed in areas where it is difficult for the system to detect the  
signal (P. 98).  
• A key from another manufacturer similar to the key is in the operational  
range.  
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3-1. Start/Stop Engine  
Forced engine starting method:  
If the KEY warning light (red) illuminates, or the push button start indicator  
light (amber) flashes, this could indicate that the engine may not start using  
the usual starting method. Have your vehicle inspected at your Toyota  
dealer as soon as possible. If this occurs, the engine can be force-started.  
Press and hold the push button start until the engine starts. Other proce-  
dures necessary for starting the engine such as having the key in the cabin,  
and depressing the clutch pedal (manual transaxle) or the brake pedal  
(automatic transaxle) are required.  
When the engine is force-started, the KEY warning light (red) remains illumi-  
nated and the push button start indicator light (amber) remains flashing.  
Automatic transaxle:  
When the selector lever is in the neutral (N) position, the KEY indicator light  
(green) and the push button start indicator light (green) do not illuminate.  
After pressing the push button start and before the engine starts, the opera-  
tion sound of the fuel pump motor from near the fuel tank can be heard,  
however, this does not indicate a malfunction.  
Whether the engine is cold or warm, it should be started without the use of  
the accelerator.  
If the engine does not start the first time, refer to Starting a Flooded Engine  
under Emergency Starting. If the engine still does not start, have your vehi-  
cle inspected by your Toyota dealer (P. 482).  
WARNING  
Radio waves from the key may affect medical devices such as pace-  
makers  
Before using the key near people who use medical devices, ask the medical  
device manufacturer or your physician if radio waves from the key will affect  
the device.  
NOTICE  
If the KEY warning light (red) illuminates, or the push button start indicator  
light (amber) flashes, this could indicate a problem with the engine starting  
system and the inability to start the engine or switch the ignition to ACC or  
ON. Have your vehicle inspected at your Toyota dealer as soon as possible.  
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3-1. Start/Stop Engine  
Engine Start Function When Key Battery is Dead  
If the engine cannot be started due to a dead key battery, the engine  
can be started using the following procedure:  
1
Continue to depress the brake pedal firmly until the engine has  
completely started.  
2
3
Manual transaxle:  
Continue to depress the clutch pedal firmly until the engine has  
completely started.  
Make sure that the push button start indication light (green) flashes.  
The push button start indicator light (green) will flash even if the push but-  
ton start is pressed before depressing the clutch pedal (manual transaxle)  
or the brake pedal (automatic transaxle). If the clutch pedal is depressed  
(manual transaxle) or the brake pedal is depressed (automatic transaxle)  
under this condition, the engine can be started by resuming the procedure  
following this.  
3
4
Touch the push button start  
using the backside of the key  
(as shown) while the push but-  
ton start indicator light (green)  
Indicator light  
flashes.  
When touching the push button  
start using the backside of the key  
Push button start  
as shown in the illustration, touch  
Smart Key  
the push button start with the lock  
switch side of the key facing up.  
5
6
Make sure that the push button start indicator light (green) turns on.  
Press the push button start to start the engine.  
The engine cannot be started unless the clutch pedal is fully depressed  
(manual transaxle) or the brake pedal is fully depressed (automatic tran-  
saxle).  
If there is a malfunction with the push button start function, the push button  
start indicator light (amber) flashes. In this case, the engine may start, how-  
ever, have the vehicle checked at your Toyota dealer as soon as possible.  
If the push button start indicator light (green) does not illuminate, perform  
the operation from the beginning again. If it does not illuminate, have the  
vehicle checked at your Toyota dealer.  
To switch the ignition position without starting the engine, perform the follow-  
ing operations after the push button start indicator light (green) turns on.  
1
Release the clutch pedal (manual transaxle) or brake pedal (automatic  
transaxle).  
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3-1. Start/Stop Engine  
2
Press the push button start to switch the ignition position. The ignition  
switches in the order of ACC, ON, and off each time the push button start  
is pressed. To switch the ignition position again, perform the operation  
from the beginning.  
NOTICE  
When starting the engine by holding the smart key over the push button  
start due to a dead key battery or a malfunctioning key, be careful not to  
allow the following, otherwise the signal from the key will not be received  
correctly and the engine may not start.  
Metal parts of other keys or metal  
objects touch the key.  
Spare keys or keys for other vehicles  
equipped with an immobilizer system  
touch or come near the key.  
Devices for electronic purchases, or security passage touch or come near  
the key.  
Emergency Operation for Starting the Engine  
If the KEY warning light (red) illuminates, or the push button start indi-  
cator light (amber) flashes, this could indicate that the engine may not  
start using the usual starting method. Have your vehicle inspected at  
your Toyota dealer as soon as possible. If this occurs, the engine can  
be force-started. Press and hold the push button start until the engine  
starts. Other procedures necessary for starting the engine such as  
having the key in the cabin, and depressing the clutch pedal (manual  
transaxle) or the brake pedal (automatic transaxle) are required.  
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3-1. Start/Stop Engine  
Turning the Engine Off  
1
Stop the vehicle completely.  
2
Manual transaxle:  
Shift into neutral and set the parking brake.  
Automatic transaxle:  
Shift the selector lever to the P position and set the parking brake.  
3
Press the push button start to turn off the engine. The ignition posi-  
tion is off.  
The cooling fan in the engine compartment could turn on for a few minutes  
after the ignition is switched from ON to OFF, whether or not the A/C is on or  
off, to cool the engine compartment quickly.  
3
When the push button start is pressed from ON to ACC or OFF, the KEY  
indicator light (green) may flash for approximately 30 seconds indicating  
that the remaining battery power of the key is low.  
Replace with a new battery before the key becomes unusable.  
Refer to Key Battery Replacement on P. 410.  
Automatic transaxle:  
If the engine is turned off while the selector lever is in a position other than  
P, the ignition switches to ACC.  
WARNING  
Do not stop the engine while the vehicle is moving  
Stopping the engine while the vehicle is moving for any reason other than in  
an emergency is dangerous. Stopping the engine while the vehicle is mov-  
ing will result in reduced braking ability due to the loss of power braking,  
which could cause an accident and serious injury.  
NOTICE  
When leaving the vehicle, make sure the push button start is off.  
Emergency Engine Stop  
Continuously pressing the push button start or quickly pressing it two  
or more times while the engine is running or the vehicle is being  
driven will turn the engine off immediately. The ignition switches to  
ACC.  
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