Mitsubishi LANCER EVOLUTION-VII 2001, Technical Information Manual

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EQUIPMENT –
Diagnostic System/Battery/Immobilizer
7-4
Diagnosis connector (Black)
16
Battery
Diagnostic connector (White)
21 - 25
–
26 MPI
27 - 32 –
BATTERY
Light and compact batteries have been adopted.
Item Specifications
44B20L
Voltage V 12
Capacity (5-hour rate Ah) 34
Electrolytic fluid specific gravity
(fully charged state at 20
_
C)
1.280
IMMOBILIZER SYSTEM
The immobilizer system consists of the ignition key,
the key ring antenna, the immobilizer-ECU, and
the engine-ECU.
The ignition key has a built-in transponder as the
oscillator. The key ring antenna is installed on the
steering lock key cylinder. Only the registered igni-
tion key permits the engine to start, therefore, the
engine can never be started by means of a forged
key or by connecting the ignition wiring directly.
The system is significantly safe and reliable against
theft. In addition, the driver has only to turn the
ignition switch to the “ON” position to activate the
immobilizer system. If the ignition key is lost or
another ignition key is added, all the keys must
be registered again by using the scan tool
MB991502 (MUT- II ) for security reasons.
CONSTRUCTION DIAGRAM
The system prevents the engine from being started
deviously to protect the vehicle from theft. The op-
eration is as follows.
1. When the ignition switch is turned “ON”
position,the engine-ECU sends a requirement
for the encrypted code to the immobilizer-ECU
(at this time, the engine is remobilized).
2. When the immobilizer-ECU receives the
requirement from the engine-ECU transponder
inside the ignition key via the antenna. The
energized transponder sends the encrypted
code back to the immobilizer-ECU via the
antenna.
3. The immobilizer-ECU judges the encrypted
code with its code logic in itself. If they are
identical, the immobilizer-ECU sends the
encrypted code to the engine-ECU.
4. If the engine-ECU can not receive the encrypted
code, the engine will be immobilized.