warning light TOYOTA AYGO 2015 (in English) Service Manual

3127-3. Do-it-yourself maintenance
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WARNING
■ Maintenance of the tires (vehicles with the tire pressure warning sys-
tem)
Each tire, including the spare (if provided), should be checked monthly
when cold and inflated to the inflation pressure recommended by the vehi-
cle manufacturer on the vehicle placard or tire inflation pressure label (tire
and load information label). (If your vehicle has tires of a different size than
the size indicated on the vehicle placard or tire inflation pressure label [tire
and load information label], you should determine the proper tire inflation
pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire
pressure monitoring system (TPMS-tire pressure warning system) that illu-
minates a low tire pressure telltale (tire pressure warning light) when one or
more of your tires is significantly under-inflated. Accordingly, when the low
tire pressure telltale (tire pressure warning light) illuminates, you should
stop and check your tires as soon as possible, and inflate them to the
proper pressure. Driving on a significantly under-inflated tire causes the tire
to overheat and can lead to tire failure. Under-inflation also reduces fuel effi-
ciency and tire tread life, and may affect the vehicle’s handling and stopping
ability.
Please note that the TPMS (tire pressure warning system) is not a substi-
tute for proper tire maintenance, and it is the driver’s responsibility to main-
tain correct tire pressure, even if under-inflation has not reached the level to
trigger illumination of the TPMS low tire pressure telltale (tire pressure
warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning
system) malfunction indicator to indicate when the system is not operating
properly. The TPMS (tire pressure warning system) malfunction indicator is
combined with the low tire pressure telltale (tire pressure warning light).
When the system detects a malfunction, the telltale will flash for approxi-
mately one minute and then remain continuously illuminated. This
sequence will continue upon subsequent vehicle start-ups as long as the
malfunction exists. When the malfunction indicator is illuminated, the sys-
tem may not be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a variety
of reasons, including the installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS (tire pressure warning system)
from functioning properly. Always check the TPMS (tire pressure warning
system) malfunction telltale after replacing one or more tires or wheels on
your vehicle to ensure that the repl acement or alternate tires and wheels
allow the TPMS (tire pressure warning system) to continue to function prop-
erly.

3297-3. Do-it-yourself maintenance
7
Maintenance and care
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*1: 1KR engine
*2: HM01 engine
*3: Left-hand drive vehicles
*4: Right-hand drive vehicles
■After a fuse is replaced
● If the lights do not turn on even after the fuse has been replaced, a bulb may
need replacement. ( →P. 330)
● If the replaced fuse blows again, have the vehicle inspected by any autho-
rized Toyota dealer or repairer, or another duly qualified and equipped pro-
fessional.
■ If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness from damage.
26DOOR F/R*3
25Power windowsDOOR F/L*4
27A/C10Air conditioning system
28FOG RR5Rear fog light
WARNING
■ To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failure to do so may cause damage to the vehicle, and possibly a fire or
injury.
● Never use a fuse of a higher amperage rating than that indicated, or use
any other object in place of a fuse.
● Always use a genuine Toyota fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
● Do not modify the fuses or fuse boxes.
NOTICE
■ Before replacing fuses
Have the cause of electrical overload determined and repaired by any
authorized Toyota dealer or repairer, or another duly qualified and equipped
professional as soon as possible.
FuseAmpereCircuit

3407-3. 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.

341
8When trouble arises
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8-1. Essential information
Emergency flashers ........... 342
If your vehicle has to
be stopped in an
emergency ....................... 343
8-2. Steps to take in
an emergency
If your vehicle needs
to be towed ...................... 345
If you think
something is wrong.......... 350
Fuel pump shut off
system ............................ 351
If a warning light turns
on or a warning buzzer
sounds ............................. 352
If you have a flat tire
(vehicles with
a spare tire) ..................... 361
If you have a flat tire
(vehicles without
a spare tire) ..................... 374
If the engine
will not start...................... 388
If the shift lever cannot
be shifted (vehicles
with a multi-mode
manual transmission) ...... 390
If the electronic key does
not operate properly
(vehicles with a smart
entry & start system)........ 391
If the vehicle battery
is discharged ................... 394
If your vehicle overheats .... 398
If the vehicle becomes
stuck ................................ 402

3508-2. Steps to take in an emergency
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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 comes on
● “STOP” indicator flashes
● 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 misses, 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

3528-2. Steps to take in an emergency
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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
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning
→ 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.
(Flashes or comes on)
High engine coolant temperature warning light (for 1KR
engine)
Indicates that the engine is overheating.
As the coolant temperature rise, it changes from flashing
to steady on.
→ P. 398

3538-2. Steps to take in an emergency
8
When trouble arises
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(Comes on)
High engine coolant temperature warning light (for
HM01 engine)
Indicates that the engine is overheating.
→ P. 398
(Flashes)
“STOP” warning light
Indicates a malfunction in:
• Engine oil pressure is too low; or
• Engine is almost overheating.
→ Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
(Comes on)
Multi-mode manual transmissi on warning light (vehicles
with a multi-mode manual transmission)
Indicates a malfunction in the multi-mode manual trans-
mission system.
→ Have the system checked by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional.
Multi-mode manual transmission warning light (warning
buzzer) (vehicles with a multi-mode manual transmis-
sion)
Indicates a malfunction in the multi-mode manual trans-
mission system and that the clutch has become hot due to
excessive load.
→ Pull over and shift the shift lever to N. Wait for about
15 minutes for the clutch to cool down. Have the sys-
tem checked by any authorized Toyota dealer or
repairer, or another duly qualified and equipped pro-
fessional.
(Flashes)
Heat clutch warning light (warning buzzer) (vehicles
with a multi-mode manual transmission)
Indicates that the clutch has become hot, but does not
indicate a malfunction in the multi-mode manual transmis-
sion system.
→ Pull over and shift the shift lever to N. Wait for about
15 minutes for the clutch to cool down.
Warning lightWarning light/Details/Actions

3548-2. 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 emission control system (if equipped); or
• The electronic multi-mode manual transmission control
system (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 (if equipped)
→ 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.
(Yellow) (For 1KR engine)
(For HM01 engine)
Speed limiter indicator (if equipped)
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 (if equipped)
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.
Warning lightWarning light/Details/Actions

3558-2. Steps to take in an emergency
8
When trouble arises
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Slip indicator (if equipped)
Indicates a malfunction in:
• The VSC system;
• The TRC system; or
• The hill-start assist control system.
The light will flash when the VSC, the TRC or the hill-start
assist control system is operating.
→ Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
(Flashes in yellow for 15 seconds)
Smart entry & start system indicator light (warning
buzzer) (if equipped)
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 immediately.
Open door warning light (warning buzzer)*2
Indicates that a door is not fully closed
→ Check that all the doors are closed.
Driver’s and front passenger’s seat belt reminder light
(warning buzzer)*3, 4
Warns the driver and/or front passenger to fasten their
seat belts
→ Fasten the seat belt.
If the front passenger’s seat is occupied, the front
passenger’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) (if equipped)*3
Warn the rear passengers to fasten their seat belts
→ Fasten the seat belt.
Low fuel level warning light
Indicates remaining fuel is approximately 5.25 L (1.4 gal.,
1.1 Imp.gal.) or less
→ Refuel the vehicle.
Warning lightWarning light/Details/Actions

3568-2. Steps to take in an emergency
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*1: Parking brake engaged warning buzzer:
A buzzer will sound if the vehicle is driven at a speed of approximately
5 km/h (3 mph) or more.
*2: 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.
*3: Driver’s and passenger’s seat belt buzzer:
The driver’s and passenger’s seat belt buzzer sounds to alert the driver
and passenger that his or her seat belt is not fastened. The buzzer sounds
for 30 seconds after the vehicle reaches a speed of 20 km/h (12 mph).
Then, if the seat belt is still unfastened, the buzzer will sound in a different
tone for 90 more seconds.
*4: Driver’s seat belt reminder light only, on some models
■ To prevent the clutch from overheating (vehicles with a multi-mode man-
ual transmission)
● Do not use the accelerator pedal or starting assist system to hold the vehicle
on a hill.
● On an uphill incline, observe the following whenever possible:
• Maintain a safe distance from the vehicle ahead and avoid unnecessary
starting off and stopping.
• Avoid using E mode on an uphill slope. This will help to avoid unneces-
sary gear changes.
Tire pressure warning light (if equipped)
When the light comes on:
Low tire inflation pressure such as
• Natural causes ( →P. 357)
• Flat tire ( →P. 361, 374)
→ Adjust the tire inflation pressure to the specified level
and carry out initialization.
When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system
→ Have the system checked by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional.
Warning lightWarning light/Details/Actions