2010 TOYOTA PRIUS warning

When driving2
149
PRIUS_U (OM47668U) U.S.A.
2-1. Driving proceduresDriving the vehicle............ 150
Power (ignition) switch ..... 162
EV-Drive Mode................. 168
Transmission.................... 171
Turn signal lever .............. 178
Parking brake ................... 179
Horn ................................. 180
2-2. Instrument cluster Gauges and meters ......... 181
Indicators and warning 
lights .............................. 185
Multi-information  display............................ 188 2-3. Operating the lights and
windshield wipers
Headlight switch ............... 206
Fog light switch ................ 209
Windshield wipers 
and washer .................... 210
Rear window wiper  and washer .................... 212
Headlight 
cleaner switch ................ 213
2-4. Using other driving systems Cruise control ................... 214
Dynamic radar 
cruise control ................. 218
Rear view monitor 
system ........................... 231
LKA (Lane-Keeping 
Assist) ............................ 235
Hill-start assist control ...... 243
Driving assist systems ..... 245
Pre-Collision System........ 249
2-5. Driving information Cargo and luggage .......... 255
Vehicle load limits ............ 260
Winter driving tips ............ 261
Trailer towing ................... 266
Dinghy towing .................. 267

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2-1. Driving procedures
2
When driving
PRIUS_U (OM47668U) U.S.A.
■
Environmentally friendly driving
Environmentally friendly driving can be ac hieved by driving with the Hybrid
System Indicator. ( P. 192)
■ Brake actuator
The brake actuator uses brake fluid pressurized by the pump to power-assist
the brakes. If the brake actuator fails during driving, the brake system warn-
ing light comes on and the buzzer sounds continuously. In this case, the
brakes may not work properly. If they do not work well, depress the brake
pedal firmly. If the brake system warning light comes on, immediately stop
your vehicle and contact your Toyota dealer.
In the following conditions, you may hear a sound in the engine compart-
ment. This is not a malfunction.
● The driver’s door is opened with the hybrid system turned off.
● The brake pedal is depressed with the hybrid system turned off.
● After the hybrid system is turned on.
● The brake pedal is depressed repeatedly with the hybrid system turned
on.
● After the hybrid system is turned off.
The brake pedal may be hard to depress or the brake pedal stroke may be
short before turning the hybrid system on. This is not a malfunction.
■ When braking the vehicle
When applying brakes, you may hear a sound coming from the motor gener-
ator.
However, this does not indicate any trouble.

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2-1. Driving procedures
2
When driving
PRIUS_U (OM47668U) U.S.A.
■
Reverse warning buzzer
When shifting into “R”, a buzzer will sound to inform the driver that the shift
lever is in “R”.
■ When in heavy traffic
If the shift lever is in “N”, the hybrid battery (traction battery) will not be
charged. To help prevent the battery from discharging, avoid putting the shift
lever in “N” for an extended period of time.
■ Eco Driving Mode
When the accelerator pedal is depressed in Eco Driving Mode, it may take
more time to accelerate than usual. This is normal operation.
■ If the system malfunctions
The following situations indicate a problem with the system. 
Immediately stop the vehicle in a safe place and contact your Toyota dealer.
● The indicator on the “P” position switch flashes. However, this does not
indicate a malfunction unless a warning message appears in the multi-
information display.
● All frames of the shift position indicators in the instrument cluster flash.
● The parking system error message appears on the multi-information dis-
play.
● The instrument cluster does not come on when the “POWER” switch is in
ON mode.

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2-1. Driving procedures
2
When driving
PRIUS_U (OM47668U) U.S.A.
*: Follow the warning message displayed.
CAUTION
■
To avoid an accident
Do not hang objects on or attach objects to the shift lever. 
Doing so may cause the shift lever to move and the shift position to change.
AlarmSituationCorrection procedure
Interior alarm beep sounds and warning message
*
If the driver’s door is
opened while the transmis-
sion is in “N”, “D” or “B”. Push the “P” position
switch.

185
2-2. Instrument cluster
2
When driving
PRIUS_U (OM47668U) U.S.A.
Indicators and warning lights
The indicator and warning lights on the instrument cluster and
instrument panel inform the driver of the status of the vehicle’s vari-
ous systems.
Instrument cluster
Instrument panel
ITO22P103

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2-2. Instrument cluster
2
When driving
PRIUS_U (OM47668U) U.S.A.
CAUTION
■
If a safety system warning light does not come on
Should a safety system light such as the ABS and the SRS airbag warning
lights not come on when you start the hybrid system, this could mean that
these systems are not available to help protect you in an accident, which
could result in death or serious injury. Have the vehicle inspected by your
Toyota dealer immediately if this occurs.
■ Warning lights
Warning lights inform the driver of malfunctions in the indicated
vehicle’s systems. ( P. 496)
*: These lights turn on when the “POWER” switch is turned to ON mode
to indicate that a system check is being performed. They will turn off
after the hybrid system is started, or after a few seconds. There may
be a malfunction in a system if the lights do not come on, or if the
lights do not turn off. Have the vehicle inspected by your Toyota
dealer.
(U.S.A.)(Canada)(U.S.A.)(Canada) redyellow
(if equipped)(U.S.A.)(Canada)
(if equipped)
******
******
**

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2-2. Instrument cluster
2
When driving
PRIUS_U (OM47668U) U.S.A.
Switching the display
“TRIP” button
“DISP” button
On vehicles with touch tracer dis-
play, the steering switches opera-
tion status is displayed on the
instrument cluster for confirma-
tion purposes. (P. 182)
●Dynamic radar cruise control display (if equipped) ( P. 218)
Automatically displayed when using dynamic radar cruise control.
● Lane-keeping assist display (if equipped) ( P. 235)
Automatically displayed when using lane-keeping assist.
● Warning messages ( P. 508)
Automatically displayed when a malfunction occurs in one of the vehi-
cle’s systems.

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2-4. Using other
driving systems
2
When driving
PRIUS_U (OM47668U) U.S.A.Example of constant speed cruising

When there are no vehicles ahead
The vehicle travels at the speed set by the driver. The desired vehicle-to-
vehicle distance can also be set by operating the vehicle-to-vehicle dis-
tance control.
Example of deceleration cruising 
When the vehicle ahead is driving slower than the set speed
When a vehicle is detected running ahead of you, the system automati-
cally decelerates your vehicle. When a greater reduction in vehicle speed
is necessary, the system applies the brakes. A warning tone warns you
when the system cannot decelerate sufficiently to prevent your vehicle
from closing in on the vehicle ahead.
Example of follow-up cruising 
When following a vehicle driv ing slower than the set speed
The system continues follow-up cruising while adjusting for changes in the
speed of the vehicle ahead in order to maintain the vehicle-to-vehicle dis-
tance set by the driver.
Example of acceleration 
When there are no longer any vehi cles ahead driving slower than
the set speed
The system accelerates until the set speed is reached. The system then
returns to constant speed cruising.
Approach warning
When your vehicle is too close to a vehicle ahead, and sufficient
automatic deceleration via the cruise control is not possible, the dis-
play will flash and the buzzer will sound to alert the driver. An exam-
ple of this would be if another driver cuts in front of you while you are
following a vehicle. Apply the brakes to ensure an appropriate vehi-
cle-to-vehicle distance.