2010 TOYOTA PRIUS ECU

490 5-1. Essential information
PRIUS_U (OM47668U) U.S.A.
Towing with a sling-type truck
CAUTION
■Installing towing eyelet to the vehicle
Make sure that towing eyelet is installed securely. 
If not securely installed, towing eyelet may come loose during towing. This
may lead to accidents that cause serious injury or even death.
ITO51P103
NOTICE
■ To prevent body damage
Do not tow with a sling-type truck, either from the front or rear.

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.

502 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
■SRS warning light
This warning light system monitors the following:
● The airbag sensor assembly
● Front airbag sensors
● The curtain shield airbag sensors
● The side and curtain shield airbag sensor assemblies
● The driver’s seat position sensor
● Driver’s seat belt buckle switch
● The front passenger occupant classification ECU
● The pressure sensor
● The belt tension sensor
● “AIR BAG ON” and “AIR BA G OFF” indicator lights
● Front passenger’s seat belt buckle switch
● The inflators
● The warning light
● The interconnecting wiring and power sources
■ Open moon roof reminder buzzer
The buzzer indicates that the moon roof is not fully closed with the hybrid
system off and the driver’s door opened.

526 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Taking out the jackRemove the center deck board.
Remove the center auxiliary box.
Unhook the tightening strap.
After storing the jack, make
sure it is securely held by the
tightening strap.
STEP1
STEP2
ITO52P104
STEP3

5
When trouble arises
527
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Taking out the spare tire
Loosen the center fastener that
secures the spare tire.
Replacing a flat tire
Chock the tires.
ITO52P106
STEP1
Flat tireWheel chock positions
Front Left-hand side Behind the rear right-hand side tire
Right-hand side Behind the rear left-hand side tire
Rear Left-hand side In front of the front right-hand side tire
Right-hand side In front of the front left-hand side tire

532 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.Pass the belt through the buckle
and secure the tire firmly. Check
that the belt is securely held by
the buckle.
The belt cannot be fastened
securely if the buckle is facing the
wrong direction.
STEP4
■The compact spare tire
●The compact spare tire is identified by the label “TEMPORARY USE
ONLY” on the tire sidewall.

Use the compact spare tire temporarily only in an emergency.
●Make sure to chec k the tire inflation pressu re of the compact spare
tire. ( P. 565)
■Tread life
The compact spare tire can be used many times, if necessary. It has
tread life of up to 3000 miles (4800 km) depending on road conditions
and your driving habits. When treadwear indicators appear on the tire,
replace the tire. ( P. 441)

534 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
CAUTION
■Using the tire jack
Improper use of the tire jack may lead to death or serious injuries due to
the vehicle suddenly falling off the jack.
●Do not use the tire jack for any pu rpose other than replacing tires or
installing and removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a flat
tire. 
Do not use it on other vehicles, and do not use other tire jacks for
replacing tires on this vehicle.
●Always check that the tire jack is securely set to the jack point.
●Do not raise the vehicle while someone is in it.
●When raising the vehicle, do not put an object on or under the jack.
●Do not raise the vehicle to a heigh t greater than that required to
replace the tire.
●Use a jack stand if it is necessary to get under the vehicle.
●Do not put any part of your body under the vehicle supported by a jack.
●Do not start or operate the hybrid system while your vehicle is sup-
ported by the jack.
Take particular care when lowering the vehicle to ensure that no one
working on or near the vehicle may be injured.

536 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
CAUTION
■When the spare tire is attached
The vehicle speed may not be correctly detected, and the following sys-
tems may not operate correctly:
●ABS & Brake assist
●Enhanced VSC
●Navigation system (if equipped)
●TRAC
●Dynamic radar cruise control (if equipped)
●Cruise control (if equipped)
●PCS (if equipped)
●LKA (if equipped)
●Rear view monitor system (if equipped)
●Advanced parking guidance system (if equipped)
■After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their
storage location to reduce the possibility of personal injury during a collision
or sudden braking.
■ When stowing the flat tire
● Make sure the rear seats are in their original position.
● Secure it using a tire tie-down belt. Otherwise, the flat tire may fly out in
case of the sudden braking or an accident, resulting in death or serious
injury.