2021 TOYOTA MIRAI ECU

7
THE IMMOBILIZER KEY

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
e
lectronically registering replacement
keys is restricted. Only a Toyota dealer
or certain bonded/registered independent
l
ocksmiths can generate replacement keys.
Introduction
INTRODUCTION

8


REPLACING THE KEY
Upon purchase, each vehicle should have
two master keys 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 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 to www.aloa.org to 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.
It is wise to keep a copy of the key code
outside of the vehicle.
If the vehicle was delivered with less than
two 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
Introduction
INTRODUCTION

13
* Exception of the Hybrid Battery Pack Warranty coverage of 10 years/150,000 miles, whichever occurs first.

WHAT IS COVERED
AND HOW LONG
Basic Warranty
This warranty covers repairs and
adjustments needed to correct defects
in materials or workmanship of any
part supplied by Toyota, subject to the
exceptions indicated under “What
Is Not Covered” on pages 14–15.
Coverage is for 36 months or 36,000 miles,
whichever occurs first, with the exception of
air conditioning recharge, wheel alignment
and wheel balancing, which are covered for 12
months or 12,000 miles, whichever occurs first.
Fuel Cell System Warranty
This warranty covers repairs needed to
correc t defects in materials or workmanship
of the components listed here and supplied
by Toyo t a , subject to the exceptions indicated
under “What Is Not Covered” on pages 14-15 .
The Fuel Cell System Warranty is in effect for
8 years or 100,000 miles from the vehicle’s
in-service date, whichever occurs first for the
following components:
• Fuel cell air compressor
•
F
uel cell boost converter
•

F
uel cell ECU
•

F
uel cell hydrogen tanks
•

F
uel cell power control unit (PCU)
•

F
uel cell stack
•

H
ybrid battery ECU (battery voltage sensor)
•

H
ybrid battery pack*
•

Hybrid contro l module (power management
control module)
•

H
ydrogen fueling ECU


Powertrain Warranty
This warranty covers repairs needed to
correct defects in materials or workmanship
of any component listed below and in the

next column and supplied by Toyota, subject
to the exceptions indicated under “What Is
Not Covered” on pages 14–15.
Coverage is for 60 months or 60,000 miles,
whichever occurs first.
Transaxle and Mounts
Case and all internal parts, transaxle mounts,
seals and gaskets
.
Front-Wheel-Drive Systems
Axle shaft, hub, bearings, seals and gaskets.
Restraint Systems Warranty
This warranty covers repairs needed to
correct defects in materials or workmanship
of any seatbelt or airbag system supplied by
Toyota, subject to the exceptions indicated
under “What Is Not Covered” on pages 14–15.
Coverage is for 60 months or 60,000 miles,
whichever occurs first.
For vehicles sold and registered in the
state of Kansas, the warranty for seatbelts
and related components is 10 years,
regardless of mileage.
NEW VEHICLE LIMITED WARRANTY
Your Warranties in Detail
WARRANTY

42
EXPLANATION OF MAINTENANCE ITEMS
T
he following descriptions are
provided to give you a better
u
nderstanding of the maintenance
items that should be performed on your
v
ehicle. The scheduled maintenance log
indicates at which mileage/time intervals
each item should be performed. Please
note that many maintenance items should
be performed only by a qualified technician.
For further information on maintenance
items you can perform yourself, see the
“Maintenance and Care” section of the
Owner’s Manual.
Ball Joints and Dust Covers
Check the suspension and steering
linkage ball joints for looseness and
damage. Check all dust covers for
deterioration and damage. Replace
any deteriorated or damaged parts.
A qualified technician should perform
these operations.
Brake Lines and Hoses
Visually inspect for proper installation.
Check for chafing, cracks, deterioration
and signs of leakage. Replace any
deteriorated or damaged parts. A qualified
technician should perform these operations.
Brake Linings/Drums and
Brake Pads/Discs
Check the brake linings (shoes) and
drums for scoring, burning, fluid leakage,
broken parts and excessive wear. Check
the pads for excessive wear and the discs
for runout, excessive wear and fluid
leakage. Replace any deteriorated or
damaged parts. A qualified technician
should perform these operations.
Breather Pipe Tip Part (Gore film)
Replace at specified intervals. A qualified
technician should perform this operation.
Cabin Air Filter
Replace at specified intervals. Driving in
heavy traffic, on dirt roads or in urban,
desert or dusty areas may shorten filter’s
life. More frequent replacement may
be necessary.
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.
Maintenance Log
MAINTENANCE