2011 TOYOTA PRIUS ECU

THE NEW WORLD OF
ANTI-THEFT TECHNOLOGY
This Toyota vehicle may be equipped with
an electronic “immobilizer” anti-theft
system. When the key is inserted into the
ignition switch it transmits an electronic
code to an immobilizer computer. The
engine will only start if the code in the key
matches the code in the immobilizer. If the
code does not match, the immobilizer
disables the ignition and fuel systems.
While an exact physical copy of the key
will open the door and allow retrieval of
items locked in the vehicle, it won’t start
the vehicle unless the key has the same
code as the immobilizer.
SECURITY
For security purposes, access to key
codes and service procedures for
electronically registering replacement keys
is restricted. Only a Toyota dealer or
certain bonded/registered independent
locksmiths can generate replacement keys.
The Immobilizer Key
WARRANTY
Introduction5

REPLACING THE KEY
Upon purchase, each vehicle should have
two master keys, one valet key and an
aluminum tag with a key-code imprinted
on it.
To generate a fully functional replacement
key (one that will both open the doors and
start the engine), one of the master keys
is required. To make a key that will open
the door for retrieval of items locked
inside the vehicle, the valet key or
aluminum key-code tag can be used. If a
master key or the aluminum key-code tag
is not available, a Toyota dealer or certain
registered locksmiths can obtain the key
code from a restricted-access database.
These businesses can also access a
service utility to reprogram the
immobilizer if all registered master keys
have been lost. If a Toyota dealer is not
available, please refer towww.aloa.orgto
find a bonded/registered locksmith who
performs high security key service.
KEEPING THE KEY SAFE
Replacing an immobilizer key may be
costly. It is advisable to keep a spare
master key and the aluminum key-code
tag in a safe place. If you record the
key-code in more than one place, do not
record it in a way that can be easily
identified and associated with the vehicle.
For example, don’t leave the code
somewhere that can be accessed by a
valet. It is wise to keep a copy of the
key-code outside of the vehicle.
If the vehicle was delivered with less than
all three keys and the aluminum key-code
tag, consider having the Toyota dealer or a
qualified independent automotive
locksmith make a duplicate key before you
need it.
The Immobilizer Key
WARRANTY
6Introduction

Drive Shaft Boots
Check the drive shaft boots and clamps
for cracks, deterioration and damage.
Replace any deteriorated or damaged parts
and, if necessary, repack the grease. A
qualified technician should perform these
operations.
Driver’s Floor Mat
•Only use the driver’s floor mat
designed specifically for the model
and model year of your vehicle.
•Always properly secure the driver’s
floor mat using the retaining hooks.
•Never install another floor mat on top
of the existing driver’s floor mat.
•Never install the driver’s floor mat
upside down.
Engine Air Filter
Inspect or replace at specified intervals.
When performing inspections, check for
damage, excessive wear and oiliness, and
replace if necessary.
Engine/Inverter Coolant
Drain the cooling system and refill with an
ethylene-glycol type coolant. Inspect hoses
and connections for corrosion and leaks.
Tighten connections and replace parts
when necessary. A qualified technician
should perform these operations. (For
further details, refer toRadiator,
Condenser and Hosesin theVehicle
Maintenance and Caresection of the
Owner’s Manual).
Your Toyota is equipped with Genuine
Toyota Super Long-Life Coolant. The
replacement intervals for engine
coolant recommended in this booklet
are based on replacement with
Genuine Toyota Super Long-Life
Coolant or similar high-quality
non-silicate, non-amine, non-borate
ethylene-glycol coolant with long-life
hybrid organic acid technology (i.e., a
combination of low phosphates and
organic acids). If another type of
ethylene-glycol coolant is used,
replacement intervals may be different.
Explanation of Maintenance Items
Maintenance Log55
MAINTENANCE