engine TOYOTA YARIS 2018 Workshop Manual

5188-2. Steps to take in an emergency
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*4
*5
Low engine oil pressure warning light
Indicates that the engine oil pressure is too low.
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
*4
(Red warning light flashers or comes on)
*5
High engine coolant temperature warning light
Indicates that the engine is overheating.
As the coolant temperature rises, it changes from flashing
to steady on.
 P. 581
*4
Hybrid system warning light (warning buzzer)
Indicates a malfunction in the hybrid system.
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
Malfunction indicator lamp
Indicates a malfunction in:
• The hybrid system;
• The hybrid transmission control system;
• The electronic engine control system;
• The electronic throttle control system; or
• The emission control system.
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system.
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Warning lightWarning light/Details/Actions

5338-2. Steps to take in an emergency
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When trouble arises
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■Warning messages
The warning messages explained below may differ from the actual
messages according to operation conditions and vehicle specifica-
tions.
■If “Visit your dealer” is shown
The system or part shown on the multi-information display is mal-
functioning.
Have the vehicle inspected by any authorized Toyota retailer or
Toyota authorized repairer, or any reliable repairer.
■If a message about an operation is shown
● If a message about an operation of the power switch is shown
An instruction for operation of the power switch is shown when
the incorrect procedure for starting the engine is performed or the
power switch is operated incorrectly. Follow the instructions
shown on the multi-information display to operate the power
switch again.
● If a message about a shift lever operation is shown
To prevent the shift lever from being operated incorrectly or the
vehicle from moving unexpectedly, a message that requires shift-
ing the shift lever may be shown on the multi-information display.
In that case, follow the instruction of the message and shift the
shift lever.
● If a message or image about an open/close state of a part or
replenishment of a consumable is shown
Confirm the part indicated by the multi-information display or a
warning light, and then perform the coping method such as clos-
ing the open door or replenishing a consumable.

5348-2. Steps to take in an emergency
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■If “See owner’s manual” is shown
If “Hybrid system malfunction. Stop in a safe place. See owner’s
manual.” is shown, there may be a malfunction. Immediately have
the vehicle inspected by any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
■If “Maintenance required for Traction battery cooling parts.
See owner’s manual” is shown
The filter may be clogged, the air intake vent may be blocked or
there may be a gap in the duct.
If the air intake vent is dirty, refer to P. 420 for cleaning the air intake
vent.
If the message is being displayed and the air intake vent is not dirty,
have the vehicle inspected at any authorized Toyota retailer or Toy-
ota authorized repairer, or any reliable repairer.
■If “Charging system malfunction. Stop in a safe place. See
owner’s manual.” is shown
Indicates a malfunction in the vehicle’s charging system. Immedi-
ately stop the vehicle in a safe place and contact any authorized
Toyota retailer or Toyota authorized repairer, or any reliable
repairer. Continuing to drive the vehicle may be dangerous.
■If “Engine oil pressure low” is shown
Indicates that the engine oil pressure is too low. Immediately stop
the vehicle in a safe place and contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.

5698-2. Steps to take in an emergency
8
When trouble arises
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WARNING
■When using the full-size spare tire (if equipped)
● On vehicles with a tire pressure warning system: Replace the full-size
spare tire with a standard tire as soon as possible.
● Avoid sudden acceleration, abrupt steering, sudden braking and shifting
operations that cause sudden engine braking.
■ When using the compact spare tire (if equipped)
● Remember that the compact spare tire provided is specifically designed
for use with your vehicle. Do not use your compact spare tire on another
vehicle.
● Do not use more than one compact spare tire simultaneously.
● Replace the compact spare tire with a standard tire as soon as possible.
● Avoid sudden acceleration, abrupt steering, sudden braking and shifting
operations that cause sudden engine braking.
■ When storing the spare tire (if equipped)
Be careful not to catch fingers or other body parts between the spare tire
and the body of the vehicle.
■ After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their
storage location to reduce the possibility of personal injury during a collision
or sudden braking.
■ When the compact spare tire is attached (if equipped)
The vehicle speed may not be correctly detected, and the following systems
may not operate correctly:
■ Speed limit when using the compact spare tire (if equipped)
Do not drive at speeds in excess of 80 km/h (50 mph) when a compact
spare tire is installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failure to
observe this precaution may lead to an accident causing death or serious
injury.
• ABS & Brake assist
• VSC
•TRC
• EPS
• Automatic High Beam*
*: If equipped
• PCS (Pre-Crash Safety system)*
• LDA (Lane Departure Alert)*
• Cruise control*
• Navigation system*

5778-2. Steps to take in an emergency
8
When trouble arises
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Connect the jumper cables according to the following procedure.
Connect a positive jumper cable clamp to the exclusive jump
starting terminal on your vehicle.
Connect the clamp on the other end of the positive cable to the
positive (+) battery terminal on the second vehicle.
Connect a negative cable clamp to the negative (-) battery termi-
nal on the second vehicle.
Connect the clamp at the other end of the negative cable to a
solid, stationary, unpainted metallic point away from the exclusive
jump starting terminal and any moving parts as shown in the illus-
tration.
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain it at that level for approximately 5 minutes to
recharge the 12-volt battery of your vehicle.
Open and close any of the doors of your vehicle with the power
switch is in the “LOCK” position (vehicles without a smart entry &
start system) or off (vehicles with a smart entry & start system).
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5788-2. Steps to take in an emergency
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Maintain the engine speed of the second vehicle and start the
hybrid system of your vehicle by turning the power switch to “ON”
position (vehicles without a smart entry & start system) or ON mode
(vehicles with a smart entry & start system).
Make sure the “READY” indicator comes on. If the indicator does
not come on, contact any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
Once the hybrid system has started, remove the jumper cables in
the exact reverse order from which they were connected.
Close the exclusive jump starting terminal cover, and reinstall the
fuse box cover to its original position.
When installing, first hook the fuse box cover onto the two rear
tabs.
Once the hybrid system starts, have the vehicle inspected at any
authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer as soon as possible.
■ Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■ To prevent 12-volt battery discharge
● Turn off the headlights and the audio system while the hybrid system is off.
● Turn off any unnecessary electrical components when the vehicle is running
at a low speed for an extended period, such as in heavy traffic.
■ Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when
the vehicle is not in use, due to natural discharge and the draining effects of
certain electrical appliances. If the vehicle is left for a long time, the 12-volt
battery may discharge, and the hybrid system may be unable to start. (The
12-volt battery recharges automatically while the hybrid system is operating.)
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5818-2. Steps to take in an emergency
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When trouble arises
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If your vehicle overheats
●Vehicles with monochrome display: The high engine coolant tem-
perature warning light ( P. 518) comes on or flashes, or a loss of
hybrid system power is experienced. (For example, the vehicle
speed does not increase.)
Vehicles with color display:
• The needle of the engine coolant temperature gauge ( P. 1 1 7 )
enters the red zone or a loss of hybrid system power is experi-
enced.
(For example, the vehicle speed does not increase.)
• The warning message indicating overheat is shown on the multi-
information display. ( P. 531)
● Vehicles with monochrome display: If the hybrid system overheat
warning light ( P. 522) comes on.
Vehicles with color display: If the warning message indicating over-
heat is shown on the multi-information display. ( P. 535)
● Steam comes out from under the hood.
The following may indicate that your vehicle is overheating:

5828-2. Steps to take in an emergency
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■If the high engine coolant temperature warning light comes on
or flashes
Stop the vehicle in a safe place and turn off the air conditioning
system, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
cooled down sufficiently,
inspect the hoses and radia-
tor core (radiator) for any
leaks.
Radiator
Cooling fan
If a large amount of coolant
leaks, immediately contact any
authorized Toyota retailer or
Toyota authorized repairer, or
any reliable repairer.
The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.
Reservoir
“FULL”
“LOW”
Radiator cap
Correction procedures
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5858-2. Steps to take in an emergency
8
When trouble arises
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Start the hybrid system and check for the hybrid system overheat
warning light (with monochrome display) or warning message
(with color display).
If the warning light (with monochrome display) or warning mes-
sage (with color display) does not go off:
Stop the hybrid system and contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
If the warning light (with monochrome display) or warning mes-
sage (with color display) goes off:
Have the vehicle inspected at the nearest any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
WARNING
■ To prevent an accident or injury when inspecting under the hood of
your vehicle
● If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injuries such as burns.
● After the hybrid system has been turned off, check that the indicator on the
power switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fans may suddenly operate even if the gasoline
engine stops. Do not touch or approach rotating parts such as the fan,
which may lead to fingers or clothing (especially a tie, a scarf or a muffler)
getting caught, resulting in serious injury.
● Do not loosen the coolant reservoir cap while the hybrid system and radia-
tor are hot.
Serious injuries, such as burns, may result from hot coolant and steam
released under pressure.
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5868-2. Steps to take in an emergency
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NOTICE
■When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.
■ To prevent damage to the cooling system
Observe the following precautions.
● Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).
● Do not use any coolant additives.