
5
When trouble arises
453
5-2. Steps to take in an emergency
PRIUS_U_(L/O_0802)
■
Starting the hybrid system when the battery is discharged
The hybrid system cannot be started by push-starting.
■ Avoiding a discharged 12 volt battery
● Turn off the headlights and the audio system while the hybrid system is
turned off.
● Turn off any unnecessary electrical components when the vehicle is run-
ning at a low speed for an extended period, such as in heavy traffic, etc.
Start the engine of the second vehicle. Increase the engine
speed slightly and maintain at that level for approximately
five minutes to recharge the 12 volt battery of your vehicle.
Open and close any of the doors with the “POWER” switch
OFF.
Maintain the engine speed on the second vehicle and turn
the “POWER” switch to the ON mode, then start the vehi-
cle’s engine.
Make sure the “READY” light comes on. If the “READY”
light will not come on and the hybrid system will not start
after you recharge the battery, do the following procedure.
Turn the hybrid system off. Open and close the driver’s
door. Then push the “POWER” switch briefly and firmly. If
the light does not come on, contact your Toyota dealer.
Once the vehicle’s engine has started, remove the jumper
cables in the exact reverse order in which they were con-
nected.
Once the engine starts, have the vehicle checked at your Toyota
dealer as soon as possible.STEP4
STEP5
STEP6
STEP7
STEP8

456
5-2. Steps to take in an emergency
PRIUS_U_(L/O_0802)
If your vehicle overheats
Correction proceduresStop the vehicle in a safe place and turn off the automatic air
conditioning system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the engine and carefully lift the hood.
If you do not see steam: Leave the engine running and carefully lift the hood.
Remove the engine compartment cover. ( P. 365)
Check to see if the cooling fan is operating.
If the fan is operating: Wait until the engine coolant temperature gauge begins to
fall and then stop the engine.
If the fan is not operating: Stop the hybrid system immediately and call your local Toy-
ota dealer.
After the hybrid system has
cooled down sufficiently, check
the coolant level and inspect the
radiator core (radiator) for any
leaks.
The following may indicate that your vehicle is overheating:
The high engine coolant temperature warning light comes on:
The engine may be overheating.
Follow the correction procedure as described blow.
STEP1
STEP2
STEP3
STEP4
ITY52P018
STEP5

5
When trouble arises
457
5-2. Steps to take in an emergency
PRIUS_U_(L/O_0802)
Add coolant if required.
Water can be used in an emer-
gency measure if coolant is
unavailable. (
P. 467)
Have the vehicle checked at your nearest Toyota dealer as soon as
possible.
ITY52P019
STEP6
■Overheating
In the following situations, your vehicle may be overheating.
● High coolant temperature warning light is displayed on the touch screen.
● Steam is coming from under the hood.
CAUTION
■To prevent an accident or injury when inspecting under the hood of
your vehicle
● Keep hands and clothing away from the fan and engine drive belt while the
engine is running.
● Do not loosen the radiator cap while the engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.

468 6-1. Specifications
PRIUS_U_(L/O_0802)
Electrical system
Transmission
12 volt battery
Open voltage at
68F (20 C): 12.6
12.8V Fully charged
12.2 12.4V Half charged
11 . 5 11.9V Discharged
(Voltage is checked 20 minutes after
the engine and all lights are turned
off.)
Charging rates 3.5A max.
Fluid capacity
Drain and refill3.8 qt. (3.6 L, 3.2 lmp.qt.)
Fluid type Toyota Genuine ATF WS
NOTICE
■Transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may cause
deterioration in shift quality, locking up of your transmission accompanied by
vibration, and ultimately damage the transmission of your vehicle.

500
PRIUS_U_(L/O_0802)
Alphabetical index
Alphabetical index
A/C .............................................201
ABS ...........................................170
Air conditioning systemAir conditioning filter ..............394
Automatic air conditioning system ................................201
Steering wheel climate remote control switches ......215
Airbags Airbag operating conditions.....92
Airbag precautions for your child ...................................... 96
Airbag warning light............... 427
Curtain shield airbag precautions ...........................96
Front passenger occupant classification system ...........101
General airbag precautions .....96
Locations of airbags ................89
Modification and disposal of airbags ................................100
Side airbag precautions .......... 96
Side and curtain shield airbags operating conditions..............92
SRS airbags ............................ 89
Alarm ........................................... 84
Antenna.....................................231
Armrest .....................................334
Audio input ............................... 268
Audio system Antenna .................................231
CD player/changer ................239
MP3/WMA disc......................254
Optimal use ...........................262
Portable music player............268
Radio .....................................225
Steering switches .................. 269
Automatic headlight leveling system .................................... 150
Automatic light control system .................................... 150
AUX adapter ............................. 268
Auxiliary boxes ........................327 Back-up lights
Wattage................................. 471
Back door ................................... 54 Back door ................................ 54
Wireless remote control .......... 49
Smart key system .. ................. 36
Battery Checking ............................... 375
Hybrid battery
(traction battery) ................... 26
If the vehicle 12 volt battery is discharged .......................... 451
Preparing and checking before winter ....................... 177
Bluetooth
®................................ 272
Brake Fluid ...................................... 373
Parking brake ........................ 142
Brake assist.............................. 170
Break-in tips ............................. 121
Care Exterior.................................. 346
Interior ................................... 348
Seat belts .............................. 349
Cargo capacity ......................... 173
Cargo hooks ............................. 336
CD player/changer ................... 239
Chains ....................................... 179
Child-protectors ......................... 52
Child restraint system Definition ............................... 107
Installation ............................. 110
Installing CRS with lower anchorages ......................... 114
Installing CRS with seatbelts ............................. 111
Installing CRS with top
straps .................................. 115
AB
C

502 Alphabetical index
PRIUS_U_(L/O_0802)
Engine compartment cover..... 365
Engine/power control unit coolant
Capacity ................................467
Checking ............................... 371
Preparing and checking before winter ....................... 177
Engine oil Capacity ................................466
Checking ............................... 365
Preparing and checking before winter ....................... 177
Engine oil maintenance data ......................................... 369
Event data recorder .................424
Floor mats.................................335
Fluid
Brake .....................................373
Washer .................................. 378
Fog lights
Switch.................................... 156
Wattage .................................471
Front passenger occupant
classification system ............101
Front passenger’s seat belt reminder light.........................429
Front seats Adjustment .............................. 57
Front turn signal lights
Wattage .................................471
Fuel Capacity ................................464
Fuel gauge ............................ 143
Gas station information .........512
Information ............................ 472
Refueling ................................. 78
Type ......................................472
Fuel door.....................................78
Fuel filler door ............................ 78
Fuses......................................... 398 Garage door opener ................ 339
Gas station information .......... 512
Gauges...................................... 143
Glove box ................................. 323
Hands-free system
(for cellular phone) ................ 272
Head restraints........................... 62
Headlights
Discharge headlights precautions ......................... 414
Replacing light bulbs ............. 407
Switch ................................... 150
Wattage................................. 471
Heaters Side mirror ............................ 217
Hood.......................................... 361
Hooks
Cargo .................................... 336
Hybrid system Emergency shut off system..... 27
Energy monitor /
consumption screen ............. 27
High-voltage components ....... 26
Power switch ......................... 130
Illuminated entry system......... 318
Immobilizer system ................... 81
I/M test ...................................... 356
Identification Engine ................................... 463
Vehicle .................................. 463
Ignition switch.......................... 130
Indicator lights ......................... 146
Initialization Items to initialize ................... 491
Inside rear view mirror .............. 71
Instrument panel light control .................................... 144
F
G
H
I

505
Alphabetical index
PRIUS_U_(L/O_0802)
Tires
Chains .................................. 179
Checking .............................. 379
Compact spare tire ............... 439
If you have a flat tire ............. 438
Inflation pressure .................. 470
Information ........................... 475
Pressure warning system ..... 379
Replacing ............................. 438
Rotating tires ........................ 379
Size ...................................... 470
Snow tires............................. 179
Spare tire .............................. 439
Tools......................................... 438
Total load capacity .................. 176
Touch screen ........................... 186
Towing Dinghy towing ....................... 182
Emergency towing ................ 416
Trailer towing ........................ 181
Transmission “P” position switch ................ 137
Transmission ........................ 136
Trip information......................... 27
Trip meter................................. 144
Turn signal lights Replacing light bulbs ............ 407
Switch ................................... 140
Wattage ................................ 471
Vanity lights Vanity lights .......................... 330
Wattage ................................ 471
Vanity mirrors .......................... 330
Vehicle identification number................................... 463
Vehicle load limits ................... 176
Vehicle Stability Control ......... 170 Warning buzzers
Brake system ........................426
Open door ............................429
Seat belt reminder .................429
Warning lights Anti-lock brake
system (ABS) ......................428
Brake system ........................426
Charging system .... ...............427
Electric power steering warning light........................428
Low fuel level ........................429
Malfunction indicator lamp ....427
Master warning light ..............430
Open door .............................429
Seat belt reminder light .........429
SRS airbags ..........................427
Tire pressure warning
light .....................................429
Washer Checking ...............................378
Preparing and checking before winter .......................177
Switch....................................158
Washing and waxing ...............346
Weight
Cargo capacity ......................173
Load limits .............................176
Weight ...................................462
Wheels ......................................392
Window glasses ........................75
Window lock switch ...................75
Windows Power windows .......................75
Rear window defogger ..........217
Washer ..................................158
Windshield wipers
Windshield wipers .................158
Winter driving tips ...................177
Wireless remote control key Locking/Unlocking ...................49
Replacing the battery ............396
WMA disc ..................................254
V
W