engine TOYOTA YARIS HATCHBACK 2021 Repair Manual

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4-1. Before driving
Driving
Capacity), and permissible draw-
bar load before towing. (P. 4 1 0 )
Toyota recommends the use of the
Toyota hitch/bracket for your vehi-
cle. Other products of a suitable
nature and comparable quality may
also be used.
For vehicles where the towing
device blocks any of the lights or
license plate, the following shall be
observed:
Do not use towing devices that
cannot be easily removed or
repositioned.
Towing devices must be
removed or repositioned when
not in use.
■Total trailer weight and per-
missible drawbar load
Total trailer weight
Weight of the trailer itself plus the trailer
load should be within the maximum
towing capacity. Exceeding this weight is dangerous. (P.410)
When towing a trailer, use a friction
coupler or friction stabilizer (sway con-
trol device).
Permissible drawbar load
Allocate the trailer load so that the
drawbar load is greater than 25 kg
(55.1 lb.) or 4% of the towing capacity.
Do not let the drawbar load exceed the
indicated weight. (P.410)
■Information tag (manufac-
turer’s label)
Gross vehicle mass
The combined weight of the driver, pas-
sengers, luggage, towing hitch, total
curb mass and drawbar load should not
exceed the gross vehicle mass by more
than 100 kg (220.5 lb.). Exceeding this
weight is dangerous.
Maximum permissible rear axle
capacity
The weight borne by the rear axle
should not exceed the maximum per-
missible rear axle capacity by 15% or
more. Exceeding this weight is danger-
ous. The values for towing capacity
were derived from testing conducted at
sea level. Take note that engine output
and towing capacity will be reduced at
high altitudes.
Towing hitch/bracket
Important points regarding
trailer loads

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4-1. Before driving
Driving
■Transmission information
Multidrive
To maintain engine braking effi-
ciency and charging system perfor-
mance when using engine braking,
do not use the transmission in D,
must be in M and select gear step 4
or lower. ( →P.164)
Manual transmission
Refrain from driving in 6th gear to
maintain the effectiveness of
engine braking and to maintain
charging system performance.
■If the engine overheats
Towing a loaded trailer up a long,
steep incline in temperatures
exceeding 30°C (85°F) may result
in the engine overheating. If the
engine coolant temperature gauge
indicates that the engine is over-
heating, turn the air conditioning off
immediately, leave the road and
stop the vehicle in a safe place.
( →P.405)
■When parking the vehicle
Always place wheel chocks under
the wheels of both the vehicle and
trailer. Firmly set the parking brake
and shift the shift lever to P (Multid-
rive) and 1 or R (manual transmis-
sion).
WARNING
Follow all the instructions described in
this section. Failure to do so could cause an accident resulting in death or serious injury.
■Trailer towing precautions
When towing, make sure that none of the weight limits are exceeded.
( →P.153)
■Vehicle speed in towing
Observe the legal maximum speeds for trailer towing.
■Before descending hills or long declines
Reduce speed and downshift. How-
ever, never downshift suddenly while descending steep or long downhill grades.
■Operation of the brake pedal
Do not hold the brake pedal
depressed often or for long periods of time. Doing so may result in the brake overheating or reduce braking effects.
■To avoid accident or injury
●Vehicles with a compact spare tire:
Do not tow a trailer when the com- pact spare tire is installed on your vehicle.
●Vehicles with the emergency tire puncture repair kit: Do not tow a
trailer when the tire installed is repaired with the emergency tire puncture repair kit.
●Vehicles with a Dynamic radar cruise control: Do not use dynamic
radar cruise control when you are towing.
NOTICE
■Do not directly splice trailer
lights
Directly splicing trailer lights may damage your vehicle’s electrical sys-
tem and cause a malfunction.

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4-2. Driving procedures
4-2.Driving pro cedu res
1Check that the parking brake is
set.
2 Check that the shift lever is in P
(Multidrive) or N (manual trans-
mission).
3 Firmly depress the brake pedal
(Multidrive) or clutch pedal
(manual transmission).
4 Turn the engine switch to
START to start the engine.
■If the engine does not start
The engine immobilizer system may not
have been deactivated. ( →P.76) Contact any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
■When the steering lock cannot be released
When starting the engine, the engine switch may seem stuck in OFF. To free it, turn the key while turning the steering
wheel slightly left and right.
1 OFF (“LOCK” position)
The steering wheel is locked and the
key can be removed. (vehicles with a
Multidrive: The key can be removed
only when the shift lever is in P.)
2 ACC (“ACC” position)
Engine (ignition) switch
(vehicles without a
smart entry & start sys-
tem)
Starting the engine
WARNING
■When starting the engine
Always start the engine while sitting in
the driver’s seat. Do not depress the accelerator pedal while starting the engine under any circum-
stances.Doing so may cause an acci- dent resulting in death or serious injury.
NOTICE
■When starting the engine
●Do not crank the engine for more
than 30 seconds at a time. This may overheat the starter and wiring system.
●Do not race a cold engine.
●If the engine becomes difficult to start or stalls frequently, have your vehicle checked by any authorized
Toyota retailer or Toyota authorized repairer, or any reliable repairer immediately.
Changing the engine switch
positions

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4-2. Driving procedures
Driving
Some electrical components such as
the audio system can be used.
3 ON (“ON” position)
All electrical components can be used.
4START (“START” position)
For starting the engine.
■Turning the key from ACC to OFF
1 Shift the shift lever to P (Multidrive)
or N (manual transmission).
2 Push in the key and turn it to OFF.
■Key reminder function
A buzzer sounds if the driver’s door is opened while the engine switch is in OFF or ACC to remind you to remove
the key.
1 Press the parking brake switch
to check that the parking brake
is set.
2 Check that the shift lever is in P
(Multidrive) or N (manual trans-
mission).
3 Firmly depress the brake pedal
(Multidrive) or clutch pedal
(manual transmission).
and a message will be displayed
on the multi-information display. If it is
not displayed, the engine cannot be
started.
4 Press the engine switch shortly
and firmly.
When operating the engine switch, one
short, firm press is enough. It is not necessary to press and hold the switch.
The engine will crank until it starts or for
up to 30 seconds, whichever is less.
Continue depressing the brake pedal (Multidrive) or clutch pedal (manual
transmission) until the engine is com- pletely started.
The engine can be started from any
WARNING
■Caution when driving
Do not turn the engine switch to OFF while driving. If, in an emergency, you must turn the engine off while the
vehicle is moving, turn the engine switch only to ACC to stop the engine. An accident may result if the engine is
stopped while driving. ( →P.360)
NOTICE
■To prevent battery discharge
Do not leave the engine switch in ACC or ON for long periods of time without the engine running.
Engine (ignition) switch
(vehicles with a smart
entry & start system)
Performing the following oper-
ations when carrying the elec-
tronic key on your person
starts the engine or changes
engine switch modes.
Starting the engine

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4-2. Driving procedures
engine switch mode.
■Engine switch illumination
In the following situations, the engine
switch is illuminated.
●When the driver’s or passenger’s door
is opened.
●When the engine switch is in ACC or
ON.
●When the engine switch mode is
changed from ACC or ON to off.
Also, in the following situation, the
engine switch flashes.
●When depressing the brake pedal
while carrying the electronic key.
■If the engine does not start
●The engine immobilizer system may
not have been deactivated. (→P.76)
Contact any authorized Toyota retailer
or Toyota authorized repairer, or any
reliable repairer.
●If a message related to start-up is
shown on the multi-information dis-
play, read the message and follow the
instructions.
■If the battery is discharged
The engine cannot be started using the
smart entry & start system. Refer to
P.401 to restart the engine.
■Electronic key battery depletion
→P. 1 1 2
■Conditions affecting operation
→P. 1 2 4
■Notes for the entry function
→P. 1 2 5
■Steering lock function
●After turning the engine switch off and
opening and closing the doors, the
steering wheel will be locked due to
the steering lock function. Operating
the engine switch again automatically
cancels the steering lock.
●When the steering lock cannot be
released, “Push Engine Switch while
Turning Steering Wheel in Either
Direction” will be displayed on the
multi-information display.
Press the engine switch shortly and
firmly while turning the steering wheel
left and right.
●To prevent the steering lock motor
from overheating, operation of the
motor may be suspended if the engine
is turned on and off repeatedly in a
short period of time. In this case,
refrain from operating the engine
switch. After about 10 seconds, the
steering lock motor will resume func-
tioning.
■Electronic key battery
→P. 3 4 5
■Operation of the engine switch
●If the switch is not pressed shortly and
firmly, the engine switch mode may
not change or the engine may not
start.
●If attempting to restart the engine
immediately after turning the engine
switch off, the engine may not start in
some cases. After turning the engine
switch off, please wait a few seconds
before restarting the engine.

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4-2. Driving procedures
Driving
■Customization
If the smart entry & start system has been deactivated in a customized set-ting, refer to P.399.
Multidrive
1 Stop the vehicle completely.
2 Set the parking brake (→P.171),
and shift the shift lever to P.
Check the parking brake indicator is
illuminated.
3 Press the engine switch.
The engine will stop, and the meter dis- play will be extinguished.
4 Release the brake pedal and
check that “ACCESSORY” or
“IGNITION ON” is not shown on
the multi-information display.
Manual transmission
1 Stop the vehicle completely.
2 If the parking brake is in manual
mode, set the parking brake.
( →P.171)
Check the parking brake indicator is illuminated.
3 Shift the shift lever to N.
( →P.168)
4 Press the engine switch.
The engine will stop, and the meter dis-
play will be extinguished.
5 Release the brake pedal and
check that “ACCESSORY” or
“IGNITION ON” is not shown on
the multi-information display.
WARNING
■When starting the engine
Always start the engine while sitting in the driver’s seat. Do not depress the
accelerator pedal while starting the engine under any circumstances.Doing so may cause an accident
resulting in death or serious injury.
■Caution while driving
If engine failure occurs while the vehi- cle is moving, do not lock or open the doors until the vehicle reaches a safe
and complete stop. Activation of the steering lock in this circumstance may lead to an accident, resulting in death
or serious injury.
NOTICE
■When starting the engine
●Do not race a cold engine.
●If the engine becomes difficult to start or stalls frequently, have your vehicle checked by any authorized
Toyota retailer or Toyota authorized repairer, or any reliable repairer immediately.
■Symptoms indicating a malfunc-tion with the engine switch
If the engine switch seems to be oper- ating somewhat differently than usual, such as the switch sticking slightly,
there may be a malfunction. Contact any authorized Toyota retailer or Toyota authorized repairer, or any reli-
able repairer immediately.
Stopping the engine

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4-2. Driving procedures
Modes can be changed by pressing
the engine switch with brake pedal
(Multidrive) or clutch pedal (man-
ual transmission) released. (The
mode changes each time the
switch is pressed.)
“ACCESSORY”
“IGNITION ON”
1 OFF*
The emergency flashers can be used.
2ACC
Some electrical components such as
the audio system can be used.
“ACCESSORY” will be displayed on the
multi-information display.
3 ON
All electrical components can be used.
“IGNITION ON” will be displayed on the
multi-information display.
*: Vehicles with a Multidrive: If the shift
lever is in a position other than P
when turning off the engine, the
engine switch will be turned to ACC,
not to off.
■Auto power off function
Multidrive: If the vehicle is left in ACC or ON (the engine is not running) for more than 20 minutes with the shift lever in P,
the engine switch will automatically turn off. However, this function cannot entirely prevent battery discharge. Do
not leave the vehicle with the engine
WARNING
■Stopping the engine in an emer- gency
●If you want to stop the engine in an emergency while driving the vehi-cle, press and hold the engine
switch for more than 2 seconds, or press it briefly 3 times or more in succession. ( →P.360)
However, do not touch the engine switch while driving except in an emergency. Turning the engine off
while driving will not cause loss of steering or braking control, but the power assist to these systems will
be lost. This will make it more diffi- cult to steer and brake, so you should pull over and stop the vehi-
cle as soon as it is safe to do so.
●If the engine switch is operated
while the vehicle is running, a warn- ing message will be shown on the multi-information display and a
buzzer sounds.
●Vehicles with a Multidrive: To restart
the engine after performing an emergency shutdown, shift the shift lever to N and then press the
engine switch.
●Vehicles with a manual transmis-
sion: To restart the engine after per- forming an emergency shutdown, depress the clutch pedal and then
press the engine switch.
Changing engine switch
modes

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4-2. Driving procedures
Driving
switch in ACC or ON for long periods of
time when the engine is not running.
Manual transmission: If the vehicle is left in ACC or ON (the engine is not running)
for more than 20 minutes, the engine switch will automatically turn off. How-ever, this function cannot entirely pre-
vent battery discharge. Do not leave the vehicle with the engine switch in ACC or ON for long periods of time when the
engine is not running.
If the engine is stopped with the
shift lever in a position other than P,
the engine switch will not be turned
off but instead be turned to ACC.
Perform the following procedure to
turn the switch off:
1 Check that the parking brake is
set.
2 Shift the shift lever to P.
3 Check that “ACCESSORY” is
displayed on the multi-informa-
tion display and press the
engine switch shortly and firmly.
4 Check that “ACCESSORY” or
“IGNITION ON” on the multi-
information display are off.
NOTICE
■To prevent battery discharge
●Do not leave the engine switch in
ACC or ON for long periods of time without the engine running.
●If “ACCESSORY” or “IGNITION ON” is displayed on the multi-infor-mation display, the engine switch is
not off. Exit the vehicle after turning the engine switch off.
When stopping the engine
with the shift lever in a posi-
tion other than P (vehicles
with a Multidrive)
NOTICE
■To prevent battery discharge
Do not stop the engine when the shift lever is in a position other than P. If
the engine is stopped in another shift lever position, the engine switch will
not be turned off but instead be turned to ACC. If the vehicle is left in ACC, battery discharge may occur.

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4-2. Driving procedures
*: If equipped
*: To improve fuel efficiency and reduce
noise, shift the shift lever to D for nor-
mal driving.
■To protect the Multidrive
If the Multidrive fluid temperature is
high, “Transmission Oil Temp. High Stop
in a safe place and See owner’s man-
ual” will be displayed on the multi-infor-
mation display and the vehicle will go
into transmission protection mode auto-
matically. Have the vehicle inspected by
any authorized Toyota retailer or Toyota
authorized repairer, or any reliable
repairer.
■Multidrive fail-safe control
The system detects malfunctioning parts
targeted (all of the solenoids that per-form the shifting function) by the On-
Board Diagnostics, and performs fail-
safe mechanisms, such as restricting
the shifting function or transmission ratio
control. In this event, the malfunction
indicator lamp turns on.
■When driving with dynamic radar
cruise control activated (if
equipped)
Even when switching the driving mode
to power mode with the intent of
enabling engine braking, engine braking
will not occur because dynamic radar
cruise control will not be canceled.
(→P.266)
■Restraining sudden start (Drive-
Start Control)
→P. 1 4 5
■AI-SHIFT
AI-SHIFT automatically selects the suit-
able gear step according to driver per-
formance and driving conditions. AI-
SHIFT automatically operates when the
driving mode is set to Normal mode with
the shift lever in D. (Shifting the shift
lever to M cancels the function.)
■G AI-SHIFT
G AI-SHIFT automatically selects a suit-
able gear for sporty driving according to
driver’s input and driving conditions. G
AI-SHIFT operates automatically when
the shift lever is in D and power mode is
selected for the driving mode. (Selecting
other than power mode or shifting the
shift lever to the other position cancels
this function)
■After recharging/reconnecting the
battery
→P. 4 0 3
Multidrive*
Select the shift position
depending on your purpose
and situation.
Shift position purpose and
functions
Shift posi-
tionObjective or function
PParking the vehicle/start-
ing the engine
RReversing
N
Neutral
(Condition in which the
power is not transmitted)
DNormal driving*
M
10-speed sport sequen-
tial shiftmatic mode driving
(→P.167)

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4-2. Driving procedures
Driving
: While the engine switch is in
ON and the brake pedal
depressed*, shift the shift lever
while pushing the shift release but-
ton on the shift knob.
: Shift the shift lever while push-
ing the shift release button on the
shift knob.
: Shift the shift lever normally.
When shifting the shift lever between P
and D, make sure that the vehicle is
completely stopped and the brake
pedal is depressed.
*: For the vehicle be able to be shifted
from P, the brake pedal must be
depressed before the shift release
button is pushed. If the shift release
button is pushed first, the shift lock
will not be released.
■Shift lock system
The shift lock system is a system to pre- vent accidental operation of the shift
lever in starting. The shift lever can be shifted from P only when the engine switch is in ON
and the brake pedal is being depressed.
■If the shift lever cannot be shifted from P
First, check whether the brake pedal is
being depressed. If the shift lever cannot be shifted with your foot on the brake pedal, there may
be a problem with the shift lock system. Have the vehicle inspected by any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer immediately.The following steps may be used as an
emergency measure to ensure that the shift lever can be shifted.
Releasing the shift lock:
1 Set the parking brake.
2 Turn the engine switch off.
3 Depress the brake pedal.
4 Ply the cover up with a flathead screwdriver or equivalent tool.To prevent damaging the cover,
wrap the tip of the flathead screw- driver with a tape.
WARNING
■When driving on slippery road surfaces
Do not accelerate or shift the shift gears suddenly. Sudden changes in engine braking
may cause the vehicle to spin or skid, resulting in an accident.
Shifting the shift lever