overheating TOYOTA IQ 2012 Owners Manual

172 2-1. Driving procedures
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CAUTION
When taking a nap in the vehicle
Always turn the engine off. Otherwise, you may accidentally move the shift
lever or depress the accelerator pedal, which could cause an accident or fire
due to engine overheating. Additionally, if the vehicle is parked in a poorly
ventilated area, exhaust gases may collect and enter the vehicle, leading to
death or a serious health hazard.
When braking the vehicle
When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and may cause one
side of the vehicle to brake differently than the other side. Also the parking
brake may not securely hold the vehicle.
If the power brake assist function does not operate, do not follow other
vehicles closely and avoid downhills or sharp turns that require braking.
In this case, braking is still possible, but it will require more force on the
pedal than usual. Braking distance may also increase. Have your brakes
fixed immediately.
Do not pump the brake pedal if the engine stalls.
Each push on the pedal uses up your reserve for the power-assisted
brakes.
The brake system consists of 2 individual hydraulic systems: If one of the
systems fails, the other will still operate. In this case, the brake pedal
should be depressed more firmly than usual and braking distance
becomes longer.
Have your brakes fixed immediately.

182 2-1. Driving procedures
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Steering lock
When the “ENGINE START STOP” switch is turned off and then a door is
opened and closed, the steering lock function locks the steering wheel in its
current position. The steering lock is disabled when the “ENGINE START
STOP” switch is operated again.
Steering lock release
Steering lock motor overheat prevention
If the engine is started and stopped repeatedly in a short time, operation of
the steering lock motor is restricted to prevent overheating. If this occurs,
wait momentarily without operating the “ENGINE START STOP” switch. The
system will return to its normal condition in approximately 10 seconds.
If the engine does not start
P. 423
When the “ENGINE START STOP” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by any
authorized Toyota dealer or repairer, or another duly qualified and equipped
professional, immediately.
Make sure that the steering wheel lock is
released.
To release the steering wheel lock, gently
turn the wheel left or right while pressing
the “ENGINE START STOP” switch.
If the steering wheel lock does not
release, the “ENGINE START STOP”
switch indicator will flash green.

195 2-1. Driving procedures
2
When driving
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NOTICE
Before driving
Fully release the parking brake.
Driving the vehicle with the parking brake set will lead to brake components
overheating, which may affect braking performance and increase brake
wear.

198 2-2. Instrument cluster
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NOTICE
To prevent damage to the engine and its components
Do not let the indicator needle of the tachometer enter the red zone, which
indicates the maximum engine speed.
The engine may be overheating if the high engine coolant temperature
warning light comes on. In this case, immediately stop the vehicle in a safe
place, and check the engine after it has cooled completely. (P. 435)

227 2-4. Using other driving systems
2
When driving
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Reduced effectiveness of EPS
The effectiveness of EPS is reduced to prevent the system from overheating
when there is frequent steering input over an extended period of time. The
steering wheel may feel heavy as a result. Should this occur, refrain from
excessive steering input or stop the vehicle and turn the engine off. The sys-
tem should return to normal within 10 minutes.
CAUTION
The following situations may lead to an accident resulting in serious injury or
even death.
The ABS does not operate effectively when
The limits of tire gripping performance have been exceeded.
The vehicle hydroplanes while driving at high speed on the wet or slick
road.
Stopping distance when the ABS is operating may exceed that of nor-
mal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always
maintain a safe distance from the vehicle in front of you, especially in the fol-
lowing situations.
When driving on dirt, gravel or snow-covered roads
When driving with tire chains
When driving over bumps in the road
When driving over roads with potholes or roads with uneven roads
When TRC may not operate effectively
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRC system is operating.
Do not drive the vehicle in conditions where stability and power may be lost.
When the VSC is activated
The slip indicator flashes. Always drive carefully. Reckless driving may
cause an accident. Exercise particular care when the indicator flashes.

297 3-5. Other interior features
3
Interior features
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CAUTION
Burns
Use caution when seating the following persons in a seat with the seat
heater on to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the disabled
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping
drugs, cold remedies, etc.)
Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature
of the seat and may lead to overheating.
NOTICE
To prevent seat heater damage
Do not put unevenly weighted objects on the seat and do not stick sharp
objects (needles, nails, etc.) into the seat.
To prevent battery discharge
Turn the switch off when the engine is not running.

398 5-2. Steps to take in an emergency
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Stop the vehicle immediately.
The following warnings indicate the possibility of damage to the vehi-
cle that may lead to an accident. Immediately stop the vehicle in a
safe place and contact any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
Have the vehicle inspected immediately.
Failing to investigate the cause of the following warnings may lead to
the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional, immedi-
ately.
Warning lightWarning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging system.
Low engine oil pressure warning light
Indicates that the engine oil pressure is too low.
(Flashing or
comes on)High engine coolant temperature warning light
Indicates the engine is almost overheating. (P. 435)
Warning lightWarning light/Details
Malfunction indicator lamp
Indicates a malfunction in:
• The electronic engine control system;
• The electronic throttle control system;
• The electronic Multidrive control system; or
• The emission control system.

5
435
5-2. Steps to take in an emergency
When trouble arises
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If your vehicle overheats
Correction procedures
Stop the vehicle in a safe place and turn off the air condition-
ing system, and then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled
down sufficiently, inspect the
hoses and radiator core (radia-
tor) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contact any autho-
rized Toyota dealer or repairer, or
another duly qualified and
equipped professional.
The following may indicate that your vehicle is overheating.
The high engine coolant temperature warning light (P. 398)
comes on or flashes, or a loss of engine power is experienced.
(For example, the vehicle speed does not increase.)
Steam comes out from under the hood.

464 Alphabetical index
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Care
Exterior.................................. 306
Interior ................................... 310
Seat belts .............................. 311
CD player .................................. 265
Chains ....................................... 233
Child restraint system
Baby seats, definition ............ 137
Baby seats, installation ......... 148
Child seats, definition ............ 137
Child seats, installation ......... 148
Installing CRS with ISOFIX
rigid anchors ....................... 154
Installing CRS with
seat belts ............................ 149
Installing CRS with
top straps ............................ 155
Junior seats, definition .......... 137
Junior seats, installation........ 148
Child safety
Airbag precautions ................ 132
Battery precautions ....... 344, 433
Child restraint system ........... 137
How your child should wear
the seat belt .......................... 89
Installing child restraints........ 148
Power window lock switch .... 100
Power window precautions ... 102
Removed key battery
precautions ......................... 360
Seat belt precautions .............. 89
Seat heater precautions ........ 297
Cleaning
Exterior.................................. 306
Interior ................................... 310
Seat belts .............................. 311
Clock ......................................... 209
Condenser ................................ 342Cooling system
Engine overheating ............... 435
CRS ........................................... 137
Cup holders.............................. 289
Curtain shield airbags ............. 124
Customizable features ............ 459
Daytime running light
system .................................... 214
Defogger
Rear window ................. 252, 254
Side mirrors .......................... 254
Dimension ................................ 444
Display
Audio..................................... 257
Trip information ..................... 205
Do-it-yourself maintenance .... 316
Doors
Back door................................ 75
Door glasses ......................... 100
Door lock..................... 39, 62, 73
Side doors............................... 72
Side mirrors ............................ 95
Double locking system ........... 117
Driver’s seat belt reminder
light......................................... 399
Driving
Break-in tips .......................... 167
Correct posture ..................... 122
Procedures ........................... 164
Winter driving tips ................. 231C
D

465 Alphabetical index
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Eco driving indicator
light ......................... 167, 201, 209
Electric power steering ........... 224
Emergency flashers
Switch ................................... 386
Emergency, in case of
If the electronic key does not
operate properly ................. 427
If the engine will not start ...... 423
If the shift lever cannot be
shifted from P ..................... 425
If the vehicle battery
is discharged ...................... 430
If the warning buzzer
sounds ................................ 397
If the warning light turns
on........................................ 397
If you have a flat tire ............. 405
If you lose your keys ............. 426
If you think something is
wrong .................................. 395
If your vehicle becomes
stuck ................................... 438
If your vehicle has to
be stopped in an
emergency .......................... 440
If your vehicle needs to be
towed .................................. 388
If your vehicle overheats ....... 435
Emergency tire puncture
repair kit ................................. 405
Engine
Compartment ........................ 334
Engine switch ................ 176, 179
Hood ..................................... 319
How to start the
engine ......................... 176, 179
Identification number............. 445
If the engine will not start ...... 423
Ignition switch .............. 176, 179
Overheating .......................... 435Engine coolant
Capacity ................................ 452
Checking ............................... 340
Preparing and checking
before winter....................... 231
Engine immobilizer system .... 108
Engine oil
Capacity ................................ 449
Checking ............................... 336
Preparing and checking
before winter....................... 231
Engine switch .................. 176, 179
EPS ........................................... 224
First-aid kit holder ................... 301
Floor mat .................................. 299
Fluid
Washer ................................. 346
Fog lights
Replacing light bulbs............. 373
Switch ................................... 216
Wattage ................................ 456
Front fog lights
Replacing light bulbs............. 373
Switch ................................... 216
Wattage ................................ 456
Front passenger’s seat belt
reminder light ........................ 399
Front position lights
Replacing light bulbs............. 373
Switch ................................... 211
Wattage ................................ 456
Front seats
Adjustment .............................. 79E
F