warning light TOYOTA YARIS 2017 Workshop Manual

4267-3. Do-it-yourself maintenance
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WARNING
■Replacing light bulbs
● Turn off the lights. Do not attempt to replace the bulb immediately after
turning off the lights.
The bulbs become very hot and may cause burns.
● Do not touch the glass portion of the light bulb with bare hands. When it is
unavoidable to hold the glass portion, use and hold with a clean dry cloth
to avoid getting moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.
● Fully install light bulbs and any parts used to secure them. Failure to do so
may result in heat damage, fire, or water entering the headlight unit. This
may damage the headlights or cause condensation to build up on the lens.
■ To prevent damage or fire
● Make sure bulbs are fully seated and locked.
● Check the wattage of the bulb before installing to prevent heat damage.

427
8When trouble arises
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8-1. Essential information
Emergency flashers ........... 428
If your vehicle has to
be stopped in
an emergency .................. 429
8-2. Steps to take in
an emergency
If your vehicle needs to
be towed .......................... 431
If you think something is
wrong ............................... 437
Fuel pump shut off system
(gasoline engine only) ..... 438
If a warning light turns on
or a warning buzzer
sounds ............................. 439
If you have a flat tire
(vehicles with
a spare tire) ..................... 453
If you have a flat tire
(vehicles with
an emergency tire
puncture repair kit)........... 468
If the engine will not start ... 484
If the electronic key does
not operate properly
(vehicles with a smart
entry & start system)........ 486
If the vehicle battery is
discharged ....................... 488
If your vehicle overheats .... 493
If you run out of fuel and
the engine stalls
(diesel engine only) ......... 497
If the vehicle becomes
stuck ................................ 499

4378-2. Steps to take in an emergency
8
When trouble arises
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If you think something is wrong
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal)
● Flat-looking tires or uneven tire wear
● High engine coolant temperature warning light flashes or comes on
● Low engine coolant temperature indicator comes on or does not
come on continuously
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
● Engine misfire, stumbling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, spongy feeling, pedal almost touches
the floor
If you notice any of the following symptoms, your vehicle proba-
bly needs adjustment or repair. Contact any authorized Toyota
dealer or repairer, or another duly qualified and equipped pro-
fessional as soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

4398-2. Steps to take in an emergency
8
When trouble arises
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If a war ning light tur ns on or a warning
buzzer sounds
Calmly perform the following actions if any of the warning lights
comes on or flashes. If a light comes on or flashes, but then
goes off, this does not necessarily indicate a malfunction in the
system. However, if this continues to occur, have the vehicle
inspected by any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
Brake system warning light (warning buzzer)*1
• Low brake fluid
• Malfunction in the brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released, the system is operating normally.
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
Continuing to drive the vehicle may be dangerous.
Charging system warning light
Indicates a malfunction in the vehicle’s charging system.
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
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 dealer or repairer, or
another duly qualified and equipped professional.
(Red warning light flashes or comes on)
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. 493

4408-2. Steps to take in an emergency
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Malfunction indicator lamp
Indicates a malfunction in:
• The electronic engine control system;
• The electronic throttle control system;
• The electronic Multidrive control system (if equipped);
• The emission control system; or
• The DPF catalytic converter (if equipped).
 Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional 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
dealer or repairer, or another duly qualified and
equipped professional immediately.
ABS warning light
Indicates a malfunction in:
• The ABS; or
• The brake assist system.
 Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
Electric power steering system warning light
(warning buzzer)
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system.
 Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
Warning lightWarning light/Details/Actions

4418-2. Steps to take in an emergency
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When trouble arises
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PCS warning light*2
When the warning light flashes (and a buzzer sounds):
Indicates a malfunction in the PCS (Pre-Crash Safety sys-
tem)
 Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
When the warning light illuminates:
Indicates that the PCS (Pre-Crash Safety system) is tem-
porarily unavailable, possibly due to either of the following:
• The part of the windshield around the front sensor being
dirty, fogged up or covered with condensation, ice, stick-
ers, etc.
 Clear the dirt, fog, condensation, ice, stickers, etc.
( P. 224)
• Front sensor temperature being outside of its opera-
tional range
 Wait for a while until the area around the front sensor
has cooled down sufficiently.
When the warning light is illuminated:
Either the VSC (Vehicle Stability Control) system or PCS
(Pre-Crash Safety system) is disabled or both are dis-
abled.
 To enable the PCS, enable both the VSC system and
PCS. ( P. 224, 267)
Slip indicator*2
Indicates a malfunction in:
• The VSC system;
• The TRC system.
 Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
Warning lightWarning light/Details/Actions

4428-2. Steps to take in an emergency
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(Yellow)
Automatic High Beam indicator*2
Indicates a malfunction in the Automatic High Beam sys-
tem.
 Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
(Yellow)
Cruise control indicator*2
Indicates a malfunction in the cruise control system.
 P. 251
(Yellow)
(Yellow)
LDA indicator*2 and Lane marker indicators*2
Indicates a malfunction in the LDA system.
 Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
(Yellow)
Speed limiter indicator*2
Indicates a malfunction in the speed limiter system.
 Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
(Flashes)
Stop & Start cancel indicator*2
Indicates a malfunction in the Stop & Start system.
 Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
Fuel filter warning light (diesel engine only)
Indicate that the amount of accumulated water in the fuel
filter has reached the specified level.
 P. 380
(Flashes in yellow for 15 seconds.)
Smart entry & start system indicator*2
Indicates a malfunction in the smart entry & start system.
 Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional.
Open door warning light (warning buzzer)*3
Indicates that one or more of the doors is not fully closed.
 Check that all the side doors and back door are
closed.
Warning lightWarning light/Details/Actions

4438-2. Steps to take in an emergency
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When trouble arises
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Low fuel level warning light
Gasoline engine: Indicates that remaining fuel is about
5.8 L (1.5 gal., 1.3 Imp.gal.) or less.
Diesel engine: Indicates that remaining fuel is about 6.4 L
(1.7 gal., 1.4 Imp.gal.) or less.
 Refuel the vehicle.
Driver’s and front passenger’s seat belt reminder light
(warning buzzer)*4
Warns the driver and front passenger to fasten their seat
belts.
 Fasten the seat belt.
If the passenger’s seat is occupied, the front passen-
ger’s seat belt also needs to be fastened to make the
warning light (warning buzzer) turn off.
(On the center panel)
Rear passengers’ seat belt reminder lights
(warning buzzer)*2, 4
Warns the rear passengers to fasten their seat belts.
 Fasten the seat belt.
Tire pressure warning light*2
When the light comes on: Low tire inflation pressure such
as
• Natural causes ( P. 448)
• Flat tire ( P. 453, 468)
 Adjust the tire inflation pressure to the specified
level.
The light will turn off after a few minutes. In case the
light does not turn off even if the tire inflation pres-
sure is adjusted, have the system checked by any
authorized Toyota dealer or repairer, or another duly
qualified and equipped professional.
When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system.
( P. 448)
 Have the system checked by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional.
Warning lightWarning light/Details/Actions

4448-2. Steps to take in an emergency
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Low engine oil level warning light (diesel engine only)
Indicates that engine oil level is low.
 Check the level of engine oil, and add if necessary.
DPF system warning light (diesel engine with a DPF
system)
• Indicates that the DPF catalytic converter needs to be
cleaned due to repeated short trips and/or low-speed
driving.
• Indicates that the amount of accumulated deposits in
the DPF catalytic converter has reached the specified
level.
 To clean the DPF catalytic converter, drive the vehi-
cle at a speed of 65 km/h (40 mph) or greater for 20 to
30 minutes as much as possible until the DPF system
warning light turns off.*5
Do not turn off the engine as much as possible until
the DPF system warning light turns off.
If it is not possible to drive the vehicle at speeds of 65
km/h (40 mph) or greater, or the DPF system warning
light does not turn off even after driving for more
than 30 minutes, have the vehicle inspected by any
authorized Toyota dealer or repairer, or another duly
qualified and equipped professional.
Warning lightWarning light/Details/Actions

4458-2. Steps to take in an emergency
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When trouble arises
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*1: Parking brake engaged warning buzzer:
The buzzer sounds to indicate that the parking brake is still engaged (with
the vehicle having reached a speed of 5 km/h [3 mph]).
*2: If equipped
*3: Open door warning buzzer:
A buzzer will sound if the vehicle reaches a speed of 5 km/h (3 mph) or
more with any door open.
Engine oil change reminder light (diesel engine only)
When the light flashes:
Indicates that the engine oil is scheduled to be changed.
• Vehicles without a DPF system*6:
Flashes approximately 35000 km (22000 miles) after the
engine oil is changed. (The indicator will not work prop-
erly unless the oil maintenance data has been reset).
• Vehicles with a DPF system*6:
Flashes approximately 14500 km (9000 miles) after the
engine oil is changed. ( P. 447) (The indicator will not
work properly unless the oil maintenance data has been
reset).
 Check the engine oil, and change if necessary. After
changing the engine oil, the oil change system
should be reset. ( P. 372)
When the light comes on:
Indicates that the engine oil should be changed.
• Vehicles without a DPF system*6:
Comes on approximately 40000 km (25000 miles) after
the engine oil is changed (and the oil maintenance data
has been reset).
• Vehicles with a DPF system*6:
Comes on approximately 15000 km (9300 miles) after
the engine oil is changed (and the oil maintenance data
has been reset).
 Check and change the engine oil, and oil filter by any
authorized Toyota dealer or repairer, or another duly
qualified and equipped professional. After changing
the engine oil, the oil chan ge system should be reset.
( P. 372)
Warning lightWarning light/Details/Actions