2010 TOYOTA PRIUS stop start

162
2-1. Driving procedures
PRIUS_U (OM47668U) U.S.A.
Power (ignition) switch
Performing the following operations when carrying the electronic
key on your person starts the hybr id system or changes “POWER”
switch modes.
■ Starting the hybrid system
Check that the parking brake is set.
Sit in the driver’s seat and firmly depress the brake pedal.
The “POWER” switch indicator turns green.
Press the “POWER” switch.
The hybrid system can be
started from any mode.
After a few seconds, the
“READY” indicator comes on
with a beep sound.
The vehicle can move when
the “READY” indicator is on,
even if the engine is stopped.
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STEP2
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STEP3

167
2-1. Driving procedures
2
When driving
PRIUS_U (OM47668U) U.S.A.
■
Note for the entry function
 P. 50, 59
■ Leak detection pump
Several hours after the engine is turned off, you may hear a sound coming
from underneath the luggage compartment for several minutes. 
This is normal operation and does not indicate a malfunction.
CAUTION
■ When starting the hybrid system
Always start the hybrid system while sitting in the driver’s seat. Do not press
the accelerator pedal while starting the hybrid system under any circum-
stances. 
Doing so may cause an accident resulting in death or serious injury.
■ Stopping the hybrid system in an emergency
If you want to stop the hybrid system in an emergency while driving the vehi-
cle, push and hold the “POWER” switch for more than 3 seconds. 
However, do not touch the "POWER" switch while driving except in an emer-
gency. Turning the hybrid system 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.
NOTICE
■ To prevent 12 volt battery discharge
Do not leave the “POWER” switch in ACCESSORY or ON mode for long
periods if the hybrid system is not operating.
■ When starting the hybrid system
If the hybrid system becomes difficult to start or stalls frequently, have the 12
volt battery and electronic key battery checked immediately.

194 2-2. Instrument cluster
PRIUS_U (OM47668U) U.S.A.
*1: The images are examples only, and may vary slightly from actual condi-tions.
*2: The gasoline engine will automatically stop and restart under various conditions.
5-minute/1-minute interval fuel consumption display
The fuel consumption display shows the average fuel consumption
and the regenerated energy amount in 5-minute or 1-minute inter-
vals.
■ Switching between 5-minut e and 1-minute intervals
Press and hold the “DISP” switch
while either the 5-minute interval
or 1-minute interval display is
being shown.
The display will alternate with
each press of the button.
Multi-information display*1Eco Driving Indicator Light
Power area: 
Shows that an environ-
mentally friendly driv-
ing range is being
exceeded (during full
power driving etc.). Off

243
2-4. Using other driving systems
2
When driving
PRIUS_U (OM47668U) U.S.A.
Hill-start assist control
■Hill-start assist control operating conditions
The system operates in the following situations:
• The shift position is in other than “P”.
• The parking brake is not applied.
• The accelerator pedal is not depressed.
■ Hill-start assist control
● While hill-start assist control is operating, the brakes remain automati-
cally applied after the driver releases the brake pedal. The stop lights and
the high mounted stoplight turn on.
● Hill-start assist control operates for about 2 seconds after the brake pedal
is released.
● If the slip indicator does not flash and the buzzer does not sound when
the brake pedal is further depressed, slightly reduce the pressure on the
brake pedal (do not allow the vehicl e to roll backward) and then firmly
depress it again. If the system still does not operate, check that the oper-
ating conditions explained above have been met.
Hill-start assist control helps to prevent the vehicle from rolling
backwards when starting on incline or slippery slope.
To engage hill-start assist con-
trol, further depress the brake
pedal when the vehicle is
stopped completely.
A buzzer will sound once to
indicate the system is acti-
vated. The slip indicator will
also start flashing.
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245
2-4. Using other driving systems
2
When driving
PRIUS_U (OM47668U) U.S.A.
Driving assist systems
To help enhance driving safety and performance, the following sys-
tems operate automatically in res ponse to various driving situations.
Be aware, however, that these systems are supplementary and
should not be relied upon too h eavily when operating the vehicle.
■ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenly, or if
the brakes are applied while driving on a slippery road surface.
■Brake assist
Generates an increased level of braking force after the brake pedal is
depressed, when the system detects a panic stop situation.
■Enhanced VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or turning
on slippery road surfaces.
■TRAC (Traction Control)
Maintains drive power and prevents the front wheels from spinning
when starting the vehicle or accelerating on slippery roads.
■Hill-start assist control
P. 243
■ EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn
the steering wheel.
■Pre-Collision System (if equipped)
P. 249

246 2-4. Using other driving systems
PRIUS_U (OM47668U) U.S.A.
When the Enhanced VSC/TRAC is operatingIf the vehicle is in danger of slip-
ping or if the front wheels spin,
the slip indicator light flashes to
indicate that the Enhanced VSC/
TRAC have been engaged.
A buzzer (intermittent) sounds to
indicate that Enhanced VSC is
operating.
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■Sounds and vibrations caused by the ABS, brake assist, TRAC and
Enhanced VSC
● A sound may be heard from the engine compartment when the hybrid
system is started, just after the vehicle begins to move, if the brake pedal
is depressed forcefully or repeatedly, or 1 - 2 minutes after the hybrid
system is stopped. This sound does not indicate 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 operates, a mo tor sound (whirring sound) may be
heard. 
This does not indicate a malfunction.

424 4-3. Do-it-yourself maintenance
PRIUS_U (OM47668U) U.S.A.
CAUTION
■When raising your vehicle
Make sure to observe the following to reduce the possibility of death or\
seri-
ous injury.
● When using a floor jack, follow the instructions of the manual provided with
the jack.
● Do not use the jack that was supplied with your vehicle.
● Do not put any part of your body or get underneath the vehicle supported
only by the floor jack.
Always use automotive jack stands or a solid, flat, level surface.
● Do not start the hybrid system while the vehicle is supported by the floor
jack.
● Stop the vehicle on level firm ground, firmly set the parking brake and push
the “P” position switch.
● Make sure to set the floor jack properly at the jack point. 
Raising the vehicle with an improperly positioned floor jack will damage
the vehicle and may cause the vehicle to fall off the floor jack.
● Do not raise the vehicle while someone is in the vehicle.
● When raising the vehicle, do not place any objects on top of or underneath
the floor jack.
●Lift up the vehicle using a floor jack
such as the one shown in the illustra-
tion.

5
When trouble arises
515
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Warning messageDetailsCorrection
procedure
(If equipped) Indicates that the LKA is not
currently functional.
Restart the LKA.
The hybrid system has over-
heated. Stop and check.

( P. 548)
(Flashing) The hybrid battery (traction
battery) is low.
Stop the vehicle
and push the “P”
position switch.
(Flashing) The transmission is out of “P”
when attempting to start the
hybrid system.
Push the “P” posi-
tion switch before
pressing the
“POWER” switch.
(Flashing) The driver’s door is opened
when the transmission is out of
“P” with the hybrid system on.
Push the “P” posi-
tion switch.