warning light TOYOTA PRIUS 2010 3.G Service Manual

5
When trouble arises
517
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem,
check that the warning message and light turn off.
Interior buzzerExterior buzzerWarning messageDetailsCorrection procedure
Once 
(Comes on for 10 seconds.)
(Flashing) The electronic
key is not
detected when
attempting to
start the hybrid
system.
Confirm
the loca-
tion of the
electronic
key.
Once 3 times (Flashing)An open door
other than the
driver’s door is
closed while the
electronic key is
outside the
detection range
and the
“POWER”
switch is in
ACCESSORY
or ON mode.
Confirm
the loca-
tion of the
electronic
key.

522 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
InteriorbuzzerExterior buzzerWarning messageDetailsCorrection procedure
Once 
(Flashing)The elec-
tronic key
does not
operate
properly.
P. 542
 Power
was
turned off
due to
the auto-
matic
power off
function.Next time when
starting the
hybrid system,
increase the
engine speed
slightly and
maintain that
level for approxi-
mately 5 min-
utes to recharge
the battery.
■ Changing the engine oil
Make sure to reset oil change system.

5
When trouble arises
533
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
■
When using the compact spare tire
As the compact spare tire is not equipped with the tire pressure warning
valve and transmitter, low inflation pressure of the spare tire will not be
warned. Also, if you replace the compac t spare tire after the tire pressure
warning light comes on, the light remains on.
■ If you have a flat front tire on a road covered with snow or ice
Install the compact spare tire on the rear of the vehicle. Perform the fol-
lowing steps and fit tire chains to the front tires.
Replace a rear tire with the compact spare tire.
Replace the flat front tire with t he tire removed from the rear of
the vehicle.
Fit tire chains to the front tires.
■After completing the tire change
The tire pressure warning system must be reset. (P. 442)
■Jack point guide
STEP1
STEP2
STEP3
The jack point guides are located under
the rocker panel. They indicate the jack
point positions.

548
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
If your vehicle overheats
Correction procedures■ If the high coolant temperatur e warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air condition-
ing system.
Check to see if steam is coming out from under the hood.
If you see steam: 
Stop the hybrid system. Carefully lift the hood after the
steam subsides and then restart the hybrid system.
If you do not see steam: 
Leave the hybrid system operating and carefully lift the
hood.
The following may indicate that your vehicle is overheating:
● The high coolant temperature warn ing light comes on or flashes:
The engine may be overheating.
● “HYBRID SYSTEM OVERHEAT” is shown on the multi-informa-
tion display: 
The power control unit may be overheating.
Follow the correction procedure as described below.
STEP1
STEP2

5
When trouble arises
549
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Check to see if the cooling fans are operating.
If the fans are operating: 
Wait until the high coolant temperature warning light goes
off and then stop the hybrid system.
If the fans are not operating:  Stop the hybrid system immedi ately and call your local
Toyota dealer.
After the hybrid system has
cooled down sufficiently, check
the engine coolant level and
inspect the radiator core (radia-
tor) for any leaks.
If necessary, add engine coolant
up to the “FULL” line.
Water can be used in an emer-
gency measure if engine coolant
is unavailable. (P. 562)
STEP3
STEP4
ITO52P130
STEP5

600
PRIUS_U (OM47668U) U.S.A.
Abbreviation list
Abbreviation/Acronym list
ABBREVIATIONSMEANING
A/C Air Conditioning
ABS Anti-lock Brake System
ALR Automatic Locking Retractor
APGS Advanced Parking Guidance System
CRS Child Restraint System
ECU Electronic Control Unit
EDR Event Data Recorder
ELR Emergency Locking Retractor
EPS Electronic Power Steering
EV Electric Vehicle
GAWR Gross Axle Weight Ratings
I/M Emission inspection and maintenance
LATCH Lower Anchors and Tethers for Children
LED Light Emitting Diode
MMT Methylcy clopentadienyl Manganese Tricarbonyl
M + S Mud and Snow
MTBE Methyl Tertiary Butyl Ether
OBD On Board Diagnostics
PCS Pre-Collision System
SRS Supplemental Restraint System
TIN Tire Identification Number
TPMS Tire Pressure Monitoring (Warning) System
TRAC Traction Control
VIN Vehicle Identification Number
VSC Vehicle Stability Control

601
PRIUS_U (OM47668U) U.S.A.
Alphabetical index
Alphabetical index
A/C ............................................ 270
ABS........................................... 245
Active head restraint................. 78
Air conditioning filter .............. 457
Air conditioning systemAir conditioning filter ............. 457
Automatic air conditioning 
system................................ 270
Remote Air Conditioning 
System ............................... 285
Steering wheel climate 
remote control switches ..... 280
Airbags Airbag operating conditions .. 117
Airbag precautions for your 
child.................................... 121
Airbag warning light .............. 497
Curtain shield airbag 
precautions ........................ 121
Front passenger occupant 
classification system .......... 126
General airbag precautions .. 121
Locations of airbags ............. 113
Modification and disposal of 
airbags ............................... 125
Side airbag precautions........ 121
Side and curtain shield airbags 
operating conditions ........... 117
SRS airbags ......................... 113
Antenna .................................... 298
Anti-lock brake system ........... 245
Armrest .................................... 383
Audio input .............................. 322
Audio system
Antenna ................................ 298
Audio input ........................... 322
AUX adapter ......................... 322
CD player/changer ............... 303
MP3/WMA disc ..................... 311
Optimal use .......................... 319
Portable music player ........... 322
Radio .................................... 294
Steering switches ................. 323 Automatic headlight leveling

system ....................................206
Automatic light control 
system ....................................206
AUX adapter .............................322
Auxiliary boxes ........................375
Back door
Back door ................................72
Smart key system... .................43
Wireless remote control ..........63
Back-up lights Replacing light bulbs .............472
Wattage .................................567
Battery Checking ...............................436
Hybrid battery 
(traction battery)....................32
If the vehicle 12 volt battery is 
discharged ..........................543
Preparing and checking 
before winter .......................261
Bluetooth
®................................326
Bottle holder .............................374
Brake Fluid ......................................432
Parking brake ........................179
Brake assist ..............................245
Break-in tips .............................151
Brightness control Instrument light control ..........184
A
B

602 Alphabetical index
PRIUS_U (OM47668U) U.S.A.
CareExterior .................................. 404
Interior ...................................407
Seat belts ..............................408
Cargo capacity .........................260
Cargo hooks ............................. 385
CD player/changer ...................303
Chains ....................................... 263
Child-protectors ......................... 68
Child restraint system Booster seats, definition ........ 132
Booster seats, installation ..... 137
Convertible seats, 
definition ............................. 132
Convertible seats, 
installation ...........................137
Front passenger occupant 
classification system ...........126
Infant seats, definition ...........132
Infant seats, installation.........137
Installing child restraint 
system with 
LATCH system....... ............. 138
Installing child restraint 
system with seatbelts.......... 140
Installing child restraint 
system with top straps ........ 144
Child safety
Airbag precautions ................121
Child restraint system............132
Child-protectors ....................... 68
How your child should wear 
the seatbelt ...........................88
Installing child restraints ........ 137
Moon roof precautions .......... 100
Power window lock switch....... 98
Power window precautions .....99
Removed electronic key 
battery precautions ............. 461
Seat belt precautions ..............89
Back door ................................72 Cleaning
Exterior.................................. 404
Interior ................................... 407
Seat belts .............................. 408
Clock ......................................... 201
Condenser ................................ 432
Console box ............................. 369
Cooling system Hybrid system overheating ... 548
Cruise control Cruise control ........................ 214
Dynamic radar 
cruise control ...................... 218
Cup holders .............................. 372
Curtain shield airbags ............. 113
Customizable features ............ 587
Daytime running light 
system .................................... 207
Defogger Rear window ......................... 289
Side mirror ............................ 289
Dimension ................................ 556
Dinghy towing .......................... 267
Display Trip information ..................... 188
Warning messages ............... 508
Do-it-yourself maintenance .... 416
Door courtesy lights ................ 363
Door lock Back door ................................ 72
Side doors ............................... 67
Smart key system .. ................. 43
Wireless remote control .......... 63
Doors Back door ................................ 72
Side doors ............................... 67
Rear door child protector ........ 68C
D

603
Alphabetical index
PRIUS_U (OM47668U) U.S.A.
Driver’s seat belt reminder

light ........................................ 499
Driving
Break-in tips ......................... 151
Correct posture..................... 111
Procedures ........................... 150
Winter driving tips ................. 261
Electric Power Steering .......... 245
Electronic key Replacing battery ................. 460
When the electronic key 
battery is discharged .......... 541
Emergency flashers ............... 486
Emergency, in case of
If a warning buzzer 
sounds ............................... 496
If a warning light turns on ..... 496
If a warning message 
is displayed ........................ 508
If the electronic key does not 
operate properly ................. 541
If the hybrid system will not 
start .................................... 538
If the 12 volt battery is 
discharged ........................ 543
If you have a flat tire ............ 524
If you lose your keys............. 540
If you think something is 
wrong ................................. 493
If your vehicle becomes 
stuck................................... 553
If your vehicle needs to be 
towed ................................. 487
If your vehicle overheats ...... 548 Engine
Compartment ........................425
Hood......................................420
How to start the hybrid 
system ................................162
If the hybrid system will 
not start ...............................538
Ignition switch........................162
Overheating...........................548
“POWER” switch ...................162
Engine oil Capacity ................................560
Checking ...............................426
Preparing and checking 
before winter .......................261
Engine/power control unit coolant Capacity ................................562
Checking ...............................430
Preparing and checking 
before winter .......................261
Engine oil maintenance 
data .........................................428
Enhanced VSC (Vehicle 
Stability Control)....................245
EPS ............................................245
Event data recorder .................494
Floor mats.................................384
Fluid Brake .....................................432
Washer ..................................434
Fog lights Replacing light bulbs .............472
Switch....................................209
Wattage .................................567
Front passenger occupant 
classification system ............126
Front passenger’s seat belt 
reminder light.........................499
Front seats Adjustment ..............................78
E
F

607
Alphabetical index
PRIUS_U (OM47668U) U.S.A.
Smart key system
Antenna location............... 46, 58
Entry function ......................... 43
Starting the hybrid system .... 162
Solar Ventilation System ................................... 282
Spare tire Inflation pressure .................. 565
Storage location ................... 524
Spark plug................................ 562
Specifications .......................... 556
Speedometer ........................... 181
Steering wheel Adjustment ............................. 92
Audio switches ..................... 323
Storage compartment ............. 367
Storage feature ........................ 367
Stuck If your vehicle becomes 
stuck................................... 553
Sun visors ................................ 376
Switch Driving mode select 
switch ................................. 172
Emergency flasher switch .... 486
Fog light switch..................... 209
Ignition switch ....................... 162
Light switches ....................... 206
Power door lock switch........... 67
“POWER” switch .................. 162
Power window switch ............. 98
Ventilation switch.................. 282
Window lock switch ................ 98
Wipers and washer switch.... 210
Tail lights Switch ................................... 206
Talk switch ............................... 329
Telephone switch .................... 329 Theft deterrent system
Immobilizer system ...............108
Theft prevention labels............110
Tire inflation pressure .............565
Tire information Glossary ................................579
Size .......................................575
Tire identification number ......574
Uniform tire quality grading ...577
Tires Chains ...................................263
Checking ...............................441
Compact spare tire ................525
If you have a flat tire ..............524
Inflation pressure...................565
Information ............................572
Pressure warning system ......442
Replacing ..............................524
Rotating tires .........................441
Size .......................................565
Snow tires .............................264
Spare tire...............................525
Tonneau cover .........................385
Tools .........................................524
Total load capacity...................260
Towing Dinghy towing........................267
Emergency towing.................487
Trailer towing.........................266
TRAC .........................................245
Traction control........................245
Trailer towing ...........................266
Transmission “P” position switch .................174
Transmission .........................171
Trip information .......................188
Trip meter .................................188
Turn signal lights Replacing light bulbs .............472
Switch....................................178
Wattage .................................567
T