2012 TOYOTA IQ engine overheat

TABLE OF CONTENTSIndex
4
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4-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ........... 306
Cleaning and protecting
the vehicle interior ............ 310
4-2. Maintenance
Maintenance
requirements..................... 313
4-3. Do-it-yourself maintenance
Do-it-yourself service
precautions ....................... 316
Hood ................................... 319
Positioning a floor jack ........ 321
Replacing the tire ................ 324
Engine compartment........... 334
Tires .................................... 347
Tire inflation pressure ......... 350
Wheels ................................ 352
Air conditioning filter ........... 354
Key battery.......................... 357
Checking and replacing
fuses ................................. 361
Light bulbs .......................... 3735-1. Essential information
Emergency flashers ........... 386
If your vehicle needs to
be towed .......................... 388
If you think something is
wrong ............................... 395
Fuel pump shut off
system.............................. 396
5-2. Steps to take in an emergency
If a warning light turns
on or a warning buzzer
sounds... .......................... 397
If you have a flat tire ........... 405
If the engine will not start ... 423
If the shift lever cannot be
shifted from P (vehicles
with a Multidrive) .............. 425
If you lose your keys .......... 426
If the electronic key does
not operate properly
(vehicles with smart
entry & start system) ........ 427
If the vehicle battery is
discharged ....................... 430
If your vehicle overheats .... 435
If the vehicle becomes
stuck................................. 438
If your vehicle has
to be stopped
in an emergency .............. 440
4Maintenance and care5When trouble arises

169 2-1. Driving procedures
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When driving
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CAUTION
When driving the vehicle
Do not shift the shift lever to R while the vehicle is moving forward.
Doing so can damage the transmission and may result in a loss of vehicle
control.
Do not shift the shift lever to D (Multidrive) or 1 (manual transmission)
while the vehicle is moving backward.
Doing so can damage the transmission and may result in a loss of vehicle
control.
Moving the shift lever to N while the vehicle is moving will disengage the
engine from the transmission. Engine braking is not available when N is
selected.
During normal driving, do not turn off the engine. 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 difficult to
steer and brake, so you should pull over and stop the vehicle as soon as it
is safe to do so.
However, in the event of an emergency, such as if it becomes impossible
to stop the vehicle in the normal way. (P. 440)
Use engine braking to maintain a safe speed when driving down a steep
hill.
Using the brakes continuously may cause the brakes to overheat and lose
effectiveness. (P. 185, 189)
When stopped on an inclined surface, use the brake pedal and parking
brake to prevent the vehicle from rolling backward or forward and causing
an accident.
Do not adjust the position of the steering wheel, the seat, or the inside or
outside rear view mirrors while driving.
Doing so may result in a loss of vehicle control that can cause accidents
that may result in death or serious injury.
Always check that all passengers’ arms, heads or other parts of their bod-
ies are not outside the vehicle, as this may result in death or serious injury.

170 2-1. Driving procedures
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CAUTION
When driving on slippery road surfaces
Sudden braking, acceleration and steering may cause tire slippage and
reduce your ability to control the vehicle, resulting in an accident.
Sudden changes in engine speed, such as engine braking caused by up-
shifting or down-shifting, may cause the vehicle to skid, resulting in an
accident.
After driving through a puddle, lightly depress the brake pedal to make
sure that the brakes are functioning properly. Wet brake pads may prevent
the brakes from functioning properly. If the brakes on only one side are wet
and not functioning properly, steering control may be affected, resulting in
an accident.
When shifting the shift lever
Vehicles with a Multidrive: Be careful not to shift the shift lever with the accel-
erator pedal depressed.
This may lead to unexpected rapid acceleration of the vehicle that may
cause an accident and result in death or serious injury.
When the vehicle is stopped
Do not race the engine.
If the vehicle is in any gear other than P (Multidrive only) or N, the vehicle
may accelerate suddenly and unexpectedly, and may cause an accident.
Do not leave the vehicle with the engine running for a long time.
If such a situation cannot be avoided, park the vehicle in an open space
and check that exhaust fumes do not enter the vehicle interior.
Vehicles with a Multidrive: In order to prevent accidents due to the vehicle
rolling away, always keep depressing the brake pedal while the engine is
running, and apply the parking brake as necessary.
If the vehicle is stopped on an incline, in order to prevent accidents caused
by the vehicle rolling forward or backward, always depress the brake pedal
and securely apply the parking brake as needed.
Avoid revving or racing the engine. Running the engine at high speed
while the vehicle is stopped may cause the exhaust system to overheat,
which could result in a fire if combustible material is nearby.

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.

178 2-1. Driving procedures
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NOTICE
To prevent battery discharge
Do not leave the engine switch in the ACC or ON position for long periods if
the engine is not running.
When starting the engine
Do not crank for more than 30 seconds at a time. This may overheat the
starter and wiring systems.
Do not race a cold engine.
If the engine becomes difficult to start or stalls frequently, have the engine
checked 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.

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
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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.