2010 TOYOTA PRIUS Power steering

469
4-3. Do-it-yourself maintenance
4
Maintenance and care
PRIUS_U (OM47668U) U.S.A.
FUSEAmpereCircuit
15 P FR DOOR 25A Power windows
16 D FR DOOR 25A Power windows
17 DOOR RR 25A Power windows
18 DOOR RL 25A Power windows
19 S/ROOF 30A Electric moon roof
20 ECU-IG NO.1 10A Electric cooling fans, multiplex
communication system
21 ECU-IG NO.2 10A Driver support system, Pre-Colli-
sion System, LKA system, inside
rear view mirror, garage door
opener, yaw rate & G sensor,
brake system, electric power
steering, navigation system, elec-
tric moon roof, tire pressure warn-
ing system, seat belt
pretensioners, audio system,
emergency flashers, turn signal
lights, windshield wipers, headlight
cleaner
22 GAUGE 10A Headlight leveling system, front
passenger’s seat belt reminder
light, gauges and meters
23 A/C 10A Air conditioning system, Solar
Ventilation System, Remote Air
Conditioning System
24 WASHER 15A Windshield washer

488 5-1. Essential information
PRIUS_U (OM47668U) U.S.A.Towing eyelet
ITO51P107
■
Emergency towing procedure
Release the parking brake.
Turn the “POWER” switch to ON mode.
Put the shift lever in “N”.
CAUTION
■While towing
● Use extreme caution when towing the vehicle.
Avoid sudden starts or erratic driving maneuvers which place excessive
stress on the emergency towing eyelet and the cable or chain.
● If the hybrid system is not operating, the power assist for the brakes and
steering will not function, making steering and braking more difficult.
NOTICE
■To prevent causing serious dama ge to the transmission
Never tow this vehicle from the rear with the four wheels on the ground. 
This may cause serious damage to the transmission.
STEP1
STEP2
STEP3

498 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Warning lightWarning light/Details
Automatic headlight leveling system warning light (if
equipped)
Indicates a malfunction in the automatic headlight level-
ing system.

(U.S.A.)

(Canada)
ABS warning lightMalfunction in:
• The ABS; or
• The brake assist system.
Brake system warning light (yellow indicator) Malfunction in the electronically controlled brake sys-
tem.
Electric power steering system warning light Malfunction in the EPS (Electric Power Steering).
Pre-collision system warn ing light (if equipped)
Indicates a malfunction in the pre-collision system.

5
When trouble arises
501
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
*1: Open door warning buzzer:
The open door warning buzzer sounds to alert one or more of the doors is
not fully closed (with the vehicle hav
ing reached a speed of 3 mph [5 km/h]).
*2: Driver’s and front passenger’s seat belt reminder buzzer:
The driver’s and front passenger’s seat belts reminder sounds to alert the
driver and front passenger that his or her seat belt is not fastened. The
buzzer sounds intermittently for 10 seconds after the vehicle has reached a
speed of at lest 12 mph (20 km/h). Then, if the seat belt is still unfastened,
the buzzer will sound in a different tone for 20 more seconds.
■If the malfunction indicator lamp comes on while driving
First check whether the fuel tank cap is loose. If it is, tighten it securely.
The light will go off after taking several driving trips. 
If the light does not go off even after several trips, contact your Toyota dealer
as soon as possible.
■ Electric power steering warning light
When the voltage is low or drops, the electric power steering warning light
may come on.

5
When trouble arises
505
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
■If the tire pressure warning light comes on after blinking for 1
minute frequently
If the tire pressure warning light comes on after blinking for 1 minute fre-
quently when the “POWER” switch is
turned to ON mode, have it
checked by your Toyota dealer.
■ Customization that can be co nfigured at Toyota dealer
The vehicle speed linked seat belt reminder buzzer can be disabled. 
(Customizable features P. 587)
However, Toyota recommends that the seat belt reminder buzzer be opera-
tional to alert the driver and front passenger that the seat belts are not fas-
tened.
CAUTION
■ When the electric power steering warning light comes on
The steering wheel may become extremely heavy. 
If the steering wheel becomes heavier than usual when operating, firmly
hold and operate it using more force than usual.
■
If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could
cause loss of vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire
inflation pressure immediately.
●If the tire pressure warning light comes on even after tire inflation pres-
sure adjustment, it is pr obable that you have a flat tire. Check the tires.
If the tire is flat, change to the spare tire and have the flat tire repaired
by the nearest Toyota dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate,
you could lose control of the steering wheel or the brakes.
■If a blowout or sudden air loss should occur
The tire pressure warning syste m may not activate immediately.

579
6-1. Specifications
6
Vehicle specifications
PRIUS_U (OM47668U) U.S.A.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation 
pressure Tire pressure when the vehicle has been
parked for three hours or more, or has not
been driven more than 1 mile or 1.5 km under
that condition
Maximum inflation
pressure The maximum cold inflated
pressure to which a
tire may be inflated, s hown on the sidewall of
the tire
Recommended 
inflation pressure Cold tire inflation pressure recommended by a
manufacturer.
Accessory weight The combined weight (in excess of those stan-
dard items which may be replaced) of trans-
mission, power steering, power brakes, power
windows, power seats, radio and heater, to the
extent that these items
are available as factory-
installed equipment (whether installed or not)
Curb weight The weight of a motor vehicle with standard
equipment, including the maximum capacity of
fuel, oil and coolant, and if so equipped, air
conditioning and additional weight optional
engine
Maximum loaded 
vehicle weight The sum of:

(a) Curb weight 
(b) Accessory weight 
(c) Vehicle capacity weight 
(d) Production options weight

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

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
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