engine TOYOTA IQ 2012 Repair Manual

223 2-3. Operating the lights and wipers
2
When driving
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The rear window wiper and washer can be operated when
Vehicles without smart entry & start system
The engine switch is in the ON position.
Vehicles with smart entry & start system
The “ENGINE START STOP” switch is in IGNITION ON mode.
NOTICE
When the rear window is dry
Do not use the wipers, as they may damage the rear window.
Vehicles without intermittent wiper
Normal window wiper oper-
ation
Washer/wiper dual opera-
tion
Washer operation

225 2-4. Using other driving systems
2
When driving
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When the TRC/VSC systems are operating
The slip indicator will flash while
the TRC/VSC systems are oper-
ating.
To disable TRC and/or VSC systems
If the vehicle gets stuck in fresh snow or mud, TRC and VSC systems
may reduce power from the engine to the wheels. You may need to
turn the system off to enable you to rock the vehicle in order to free it.
Turning off TRC
To turn the TRC system off,
quickly press and release the
button.
The TRC OFF indicator will come
on.
Press the button again to turn the
system back on.
Turning off TRC and VSC systems
Press and hold the button for
more than 3 seconds while the
vehicle is stopped to turn off both
TRC and VSC systems.
The TRC OFF and VSC OFF indi-
cators will come on.
Press the button again to turn
both systems back on.

226 2-4. Using other driving systems
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Automatic reactivation of TRC and VSC systems
After turning the TRC and VSC systems off, the systems will be automati-
cally reactivated in the following situations:
Vehicles without smart entry & start system
When the engine switch is turned off
If only the TRC system is turned off, the TRC will turn on when vehicle
speed increases
If both the TRC and VSC systems are turned off, automatic reactivation
will not occur when vehicle speed increases.
Vehicles with smart entry & start system
When the “ENGINE START STOP” switch is turned off
If only the TRC system is turned off, the TRC will turn on when vehicle
speed increases
If both the TRC and VSC systems are turned off, automatic reactivation
will not occur when vehicle speed increases.
Sounds and vibrations caused by the ABS, VSC, TRC and brake assist
systems
A sound may be heard from the engine compartment when the engine is
started or just after the vehicle begins to move. This sound does not indi-
cate that a malfunction has occurred in any of these systems.
Any of the following conditions may occur when the above systems are
operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may
be heard. This does not indicate a malfunction.

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.

231
2-5. Driving information
2
When driving
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Winter driving tips
Carry out the necessary preparations and inspections before driving
the vehicle in winter. Always drive the vehicle in a manner appropri-
ate to the prevailing weather conditions.
Pre-winter preparations
Use fluids that are appropriate to the prevailing outside tem-
peratures.
• Engine oil
• Engine coolant
• Washer fluid
Have a service technician inspect the level and specific grav-
ity of battery electrolyte.
Have the vehicle fitted with four snow tires or purchase a set
of tire chains for the front tires.
Ensure that all tires are the same size and brand, and that chains
match the size of the tires.
Before driving the vehicle
Perform the following according to the driving conditions.
Do not try to forcibly open a window, scrape an outside rear
view mirror surface or move a wiper or outside rear view mir-
ror that is frozen. Pour warm water over the frozen area to
melt the ice. Wipe away the water immediately to prevent it
from freezing.
To ensure proper operation of the climate control system fan,
remove any snow that has accumulated on the air inlet vents
in front of the windshield.
Remove any ice that has accumulated on the vehicle chassis.
Periodically check for and remove any excess ice or snow
that may have accumulated in the wheel well or on the
brakes.

243 3-1. Using the air conditioning system and defogger
3
Interior features
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Air conditioning odors
During use, various odors from inside and outside the vehicle may enter
into and accumulate in the air conditioning system. This may then cause
odor to be emitted from the vents.
To reduce potential odors from occurring:
It is recommended that the air conditioning system be set to outside air
mode prior to turning the vehicle off.
CAUTION
To prevent the windshield from fogging up
Do not set the air outlet selection dial to during cool air operation in
extremely humid weather. The difference between the temperature of the
outside air and that of the windshield can cause the outer surface of the
windshield to fog up, blocking your vision.
NOTICE
To prevent battery discharge
Do not leave the air conditioning system on longer than necessary when the
engine is stopped.

251 3-1. Using the air conditioning system and defogger
3
Interior features
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When outside air temperature approaches 0C (32F)
The air conditioning system may not operate even when is pressed.
When
is selected for the air outlets used
For your driving comfort, air flowing to the feet may be warmer than air flow-
ing to the upper body depending on the position of the temperature adjust-
ment dial.
Air conditioning odors
During use, various odors from inside and outside the vehicle may enter
into and accumulate in the air conditioning system. This may then cause
odor to be emitted from the vents.
To reduce potential odors from occurring:
• It is recommended that the air conditioning system be set to outside air
mode prior to turning the vehicle off.
• The start timing of the blower may be delayed for a short period of time
immediately after the air conditioning system is started in AUTO mode.
CAUTION
To prevent the windshield from fogging up
Do not use during cool air operation in extremely humid weather. The
difference between the temperature of the outside air and that of the wind-
shield can cause the outer surface of the windshield to fog up, blocking your
vision.
NOTICE
To prevent battery discharge
Do not leave the air conditioning system on longer than necessary when the
engine is stopped.

253 3-1. Using the air conditioning system and defogger
3
Interior features
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The rear window defogger can be operated when
Vehicles without smart entry & start system
The engine switch is in the ON position.
Vehicles with smart entry & start system
The “ENGINE START STOP” switch is in IGNITION ON mode.
NOTICE
To prevent battery discharge
Do not leave the rear window defogger on longer than necessary when the
engine is stopped.
Vehicles with automatic air conditioning system
On/off
Press the button to turn on the
rear window defogger. The
indicator will come on. The
defoggers will automatically
turn off after approximately 15
minutes. Pressing the button
again also turns the defoggers
off.

255 3-1. Using the air conditioning system and defogger
3
Interior features
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The rear window and outside rear view mirror defoggers can be oper-
ated when
Vehicles without smart entry & start system
The engine switch is in the ON position.
Vehicles with smart entry & start system
The “ENGINE START STOP” switch is in IGNITION ON mode.
CAUTION
When the outside rear view mirror defoggers are on
Do not touch the rear view mirror surfaces, as they can become very hot and
burn you.
Vehicles with automatic air conditioning system
On/off
Press the button to turn on the
rear window defogger. The
indicator will come on. The
defoggers will automatically
turn off after approximately 15
minutes. Pressing the button
again also turns the defoggers
off.

256 3-1. Using the air conditioning system and defogger
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NOTICE
To prevent battery discharge
Do not leave the rear window and outside rear view mirror defoggers on lon-
ger than necessary when the engine is stopped.