2010 TOYOTA PRIUS brake

249
2-4. Using other driving systems
2
When driving
PRIUS_U (OM47668U) U.S.A.
Pre-Collision System
: If equipped
Safety systems such as the brakes and seat belts are automati-
cally engaged to lessen impact and in juries to occupants as well as
vehicle damage when the radar sensor detects an unavoidable
frontal collision.
■ Pre-collision seat belts
If the pre-collision s ensor detects that a co llision is unavoidable,
the pre-collision system will retract the seat belt before the colli-
sion occurs. 
The same will happen if the driver makes an emergency braking
or loses control of the vehicle. ( P. 8 6 )
■ Pre-collision brake assist
When there is a high possibility of a frontal collision, the system
applies greater braking force in relation to how strongly the
brake pedal is depressed.
■ Pre-collision braking
When there is a high possibility of a frontal collision, the system
warns the driver using a warning light, warning display and
buzzer. If the system determines that a collision is unavoidable,
the brakes are auto matically applied to reduce the collision
speed. Pre-collision braking can be disabled using the pre-colli-
sion braking off button.

251
2-4. Using other
driving systems
2
When driving
PRIUS_U (OM47668U) U.S.A.
■Obstacles not detected
The sensor cannot detect plastic obstacles such as pylons. There may also
be occasions when the radar sensor cannot detect pedestrians, animals,
bicycles, motorcycles, trees, or snowdrifts.
■ The pre-collision system is operational when
● Pre-collision seat belts:
• Vehicle speed is above 3 mph (5 km/h).
• The relative speed difference between your vehicle and another vehi-
cle that is ahead of your vehicle, or the speed at which your vehicle is
approaching an obstacle is greater than 18 mph (30 km/h).
• The front occupants are wearing a seat belt.
● Pre-collision brake assist:
• Vehicle speed is above 18 mph (30 km/h).
• The relative speed difference between your vehicle and another vehi-
cle that is ahead of your vehicle, or the speed at which your vehicle is
approaching an obstacle is greater than 18 mph (30 km/h).
• The brake pedal is depressed.
● Pre-collision braking:
• The pre-collision braking off button is not pressed.
• Vehicle speed is above 9 mph (15 km/h).
• The relative speed difference between your vehicle and another vehi-
cle that is ahead of your vehicle, or the speed at which your vehicle is
approaching an obstacle is greater than 9 mph (15 km/h).

252 2-4. Using other driving systems
PRIUS_U (OM47668U) U.S.A.
■Conditions that may trigger the system even if there is no danger of
collision
● When there is an object by the roadside at the entrance to a curve
● When passing an oncoming vehicle on a curve
● When driving over a narrow iron bridge
● When there is a metal object on the road surface
● When driving on an uneven road surface
● When passing an oncoming vehicle on a left-turn
● When your vehicle rapidly closes on the vehicle in front
When the system is activated in the situations described above there is also
a possibility that the seat belts will retract quickly and the brakes will be
applied with a force greater than normal. When the seat belt is locked in the
restricted position, stop the vehicle in a safe place, release the seat belt and
refasten.
■ When there is a malfunction in the system
Warning lights and/or warning messages will turn on or flash. ( P. 508)

258 2-5. Driving information
PRIUS_U (OM47668U) U.S.A.
CAUTION
■Things that must not be carried in the luggage compartment
The following things may cause a fire if loaded in the luggage compart-
ment.
●Receptacles containing gasoline
●Aerosol cans
■Storage precautions
Observe the following precautions.
Failing to do so may result in death or serious injury.
●Do not place cargo or luggage in or on the following locations as the
item may get under the brake or accelerator pedal and prevent the
pedals from being depressed properly , block the driver’s vision, or hit
the driver or passengers, causing an accident.
• Driver’s feet
• Front passenger or rear seats (when stacking items)
• Luggage cover (if equipped)
• Instrument panel
• Dashboard
• Auxiliary box or tray that has no lid
●Secure all items in the occupant compartment, as they may shift and
injure someone during sudden braking, sudden swerving or an acci-
dent.
●Never allow anyone to ride in the luggage compartment. It is not
designed for passengers. They should ride in their seats with their seat
belts properly fastened. Otherwise, th ey are much more likely to suffer
death or serious injury, in the event of sudden braking, sudden swerv-
ing or an accident.

262 2-5. Driving information
PRIUS_U (OM47668U) U.S.A.
■Before driving the vehicle
Perform the following according to the driving conditions.
●Do not try to forcibly open a window or move a wiper 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 th e 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 accumu lated 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.
■ When driving the vehicle
Accelerate the vehicle slowly and drive at a reduced speed suit-
able to road conditions.
■ When parking the vehicle
Park the vehicle and push the “P” position switch without setting
the parking brake. The parking brake may freeze up, preventing
it from being released. If necessa ry block the wheels to prevent
inadvertent sliding or creeping.

286 3-1. Using the air conditioning system and defogger
PRIUS_U (OM47668U) U.S.A.
■Operating conditions
The system will only operate if all of the following conditions are met:
● The shift position is in “P”.
● The “POWER” switch is OFF.
● All doors are closed.
● The hood is closed.
● The brake pedal is not being depressed.
● The air conditioning is not set to MAX HOT.
■ When leaving the vehicle
● Check that the headlights are switched to either off or “AUTO”.
● Check that the wiper switch is turned off.
● Check that all windows are closed.
● Check the temperature setting of the air conditioning system. 
The Remote Air Conditioning System will operate in accordance with the
temperature settings of the air conditioning system.
■ Remote Air Conditioning System automatic shut-off
The system will automatically shut off under the following conditions:
● About 3 minutes have passed since operation began
● Any one of the operating conditions is not met
The system may also shut off if the charge level of the hybrid battery (trac-
tion battery) drops to low. ( P. 188)
■ Conditions affecting operation
The system may not start in the following situations:
● The charge level of the hybrid battery (traction battery) is low (P. 188)
● The air conditioning temperature is set at a high level

412
4-2. Maintenance
PRIUS_U (OM47668U) U.S.A.
General maintenance
Engine compartment
Luggage compartment
ItemsCheck points
Brake fluid • At the correct level? (P. 432)
Engine/power control unit coolant • At the correct level? ( P. 430)
Engine oil • At the correct level? (P. 426)
Exhaust system • No fumes or strange sounds?
Radiator/condenser/hoses • Not blocked with foreign matter?

( P. 432)
Washer fluid • At the correct level? (P. 434)
ItemsCheck points
12 volt battery • Maintenance-free ( P. 436)
Listed below are the general maintenance items that should be per-
formed at the intervals specified in the “Scheduled Maintenance
Guide” or “Owner’s Manual Supple ment”. It is recommended that
any problem you notice should be brought to the attention of your
Toyota dealer or qualified service shop for advice.
Listed below are the general maintenance items that should be per-
formed at the intervals specified in the “Owner’s Warranty Informa-
tion”. It is recommended that an y problem you notice should be
brought to the attention of your Toyota dealer or qualified service
shop for advice.

413
4-2. Maintenance
4
Maintenance and care
PRIUS_U (OM47668U) U.S.A.
Vehicle interior
ItemsCheck points
Accelerator pedal • Moves smoothly (without uneven pedal
effort or catching)?
Automatic transmission
“Park” mechanism • Can the vehicle be hold securely on an
incline with the shift position in “P”?
Brake pedal • Moves smoothly?
• Does it have appropriate clearance and
correct amount of free play?
Brakes • Pulls to one side when applied?
• Loss of brake effectiveness?
• Spongy feeling brake pedal?
• Pedal almost touches floor?
Head restraints • Move smoothly and lock securely?
Indicators/buzzers • Function properly?
Lights • Do all the lights come on?
Parking brake • Moves smoothly?
• Can hold the vehicle securely on an
incline?
Seat belts • Does the seat belt system operate
smoothly?
• Are the belts undamaged?
Seats • Do the seat controls operate properly?
Steering wheel • Moves smoothly?
• Has correct free play?
• No strange noises?