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IMMOBILIZER SYSTEM
CHASSIS ELECTRICAL
54A-4
IMMOBILIZER SYSTEM
M2540003000069
The engine immobilizer system prevents the engine
from starting and immobilizes the vehicle if a key
other than the key registered for that vehicle is used
in an attempt to start the engine after forced entry.
The engine immobilizer system consists of the igni-
tion key, key ring antenna, immobilizer ECU, and
engine control module (ECM). It works in the follow-
ing way and has these functions:
1. After the ignition is switched on, the engine con-
trol module sends a control signal and transpon-
der read command signal to the immobilizer
ECU.
2. When the immobilizer ECU receives the control
signal from the engine control module through
the key ring antenna, the immobilizer ECU sup-
plies a current and sends random number data to
the transponder in the ignition key.
3. The transponder uses the random number data
to derive an ID code, which is sent to the immobi-
lizer ECU through the key ring antenna.
4. The immobilizer ECU compares the ID code that
was sent with pre-registered ID codes, and if it
matches, a control signal approving ignition is
sent to the engine control module. If the ID code
does not match (in the case of counterfeit ignition
keys, for example), the immobilizer ECU sends a
control signal denying ignition to the engine con-
trol module, preventing the engine from starting.
5. The system is designed to be maintenance-free
because the power source for the transponder is
supplied by the immobilizer ECU. Two ignition
keys are provided, and up to four keys can be
registered to one vehicle (one receiver) as
needed. There are one million possible combina-
tions for the registered ID codes. In addition, one
part of the code is changed each time the key is
switched on, which improves security by prevent-
ing theft using a copied ID code.
NOTE: If the immobilizer ECU is replaced or if the
ignition key is lost or additional keys are requested,
the MUT-II or III must be used to reset all transmitter
ID codes. During the resetting process, all transmit-
ters must be re-registered because the registered ID
codes will be erased.
CONSTRUCTION DIAGRAM
AC210964
TRANS-
PONDER
POWER
(WIRELESS)
ENCRYPTED
CODE (WIRELESS)
MUT-II/III
AB
ENGINE
CONTROL
MODULE
CONTROL
SIGNAL
KEY RING
ANTENNA
IMMOBILIZER
ECU
Summary of Contents for Lancer Evolution VIII 2003
Page 14: ...36 1 GROUP 36 PARKING BRAKE CONTENTS GENERAL INFORMATION 36 2 ...
Page 27: ...NOTES ...
Page 34: ...34 1 GROUP 34 REAR SUSPENSION CONTENTS GENERAL DESCRIPTION 34 2 ...
Page 37: ...NOTES ...
Page 43: ...NOTES ...
Page 57: ...NOTES ...
Page 58: ...31 1 GROUP 31 WHEEL AND TIRE CONTENTS GENERAL INFORMATION 31 2 ...
Page 60: ...21 1 GROUP 21 CLUTCH CONTENTS GENERAL DESCRIPTION 21 2 ...
Page 70: ...27 1 GROUP 27 REAR AXLE CONTENTS REAR AXLE 27 2 DIFFERENTIAL 27 3 ...
Page 75: ...NOTES ...
Page 85: ...NOTES ...
Page 94: ...26 1 GROUP 26 FRONT AXLE CONTENTS GENERAL DESCRIPTION 26 2 ...
Page 114: ...11A 1 GROUP 11A ENGINE CONTENTS GENERAL SPECIFICATIONS 11A 2 BASE ENGINE 11A 3 ...
Page 119: ...NOTES ...
Page 126: ...13B 1 GROUP 13B FUEL SUPPLY CONTENTS GENERAL DESCRIPTION 13B 2 FUEL TANK 13B 3 ...
Page 129: ...NOTES ...
Page 130: ...25 1 GROUP 25 PROPELLER SHAFT CONTENTS GENERAL DESCRIPTION 25 2 ...
Page 132: ...16 1 GROUP 16 ENGINE ELECTRICAL CONTENTS CAMSHAFT POSITION SENSOR 16 2 ...
Page 134: ...12 1 GROUP 12 ENGINE LUBRICATION CONTENTS GENERAL DESCRIPTION 12 2 ...
Page 142: ...32 1 GROUP 32 POWER PLANT MOUNT CONTENTS GENERAL DESCRIPTION 32 2 ...
Page 144: ...14 1 GROUP 14 ENGINE COOLING CONTENTS GENERAL DESCRIPTION 14 2 ...
Page 147: ...NOTES ...
Page 161: ...NOTES ...
Page 162: ...13 1 GROUP 13 FUEL CONTENTS MULTIPORT FUEL SYSTEM MFI 13A FUEL SUPPLY 13B ...
Page 163: ...NOTES ...
Page 177: ...NOTES ...
Page 183: ...NOTES ...
Page 203: ...7 1 GROUP 7 WIRING AND PIPING DIAGRAM CONTENTS PIPING DIAGRAM 7 2 ...
Page 246: ...NOTES ...
Page 260: ...NOTES ...
Page 264: ...NOTES ...
Page 265: ...5 1 GROUP 5 SYNTHETIC RESIN PARTS CONTENTS LOCATION OF SYNTHETIC RESIN PARTS 5 2 ...
Page 268: ...NOTES ...
Page 276: ...NOTES ...
Page 283: ...FENDER SHIELD WELDED PANEL REPLACEMENT 3 7 NOTES ...
Page 368: ...NOTES ...