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8G3-4 IMMOBILIZER CONTROL SYSTEM (Z13DT ENGINE MODEL)
1
Immobilizer Control System Components
Description
The immobilizer control system designed to prevent vehicle bur-
glar and it consists of following components.
• Engine Control Module (ECM)
• Immobilizer Control Module (with coil antenna)
• Ignition key (with built-in transponder)
Ignition Key (With Built-in Transponder)
Transponder is built in an ignition key grip (1). Each transponder
in the key has a FIX CODE (FC) and SECRET KEY CODE
(SKC). The FC will be transmitted from the transponder via the
coil antenna to Immobilizer Control Module when the ignition
switch is turned to ON (II) position. SKC is used for calculation
with variable sent from ECM. SKC is preset (programmed) at fac-
tory shipment.
Immobilizer Control Module
Immobilizer Control Module (1) is installed to steering column
beside ignition key switch. The coil antenna is installed to Immo-
bilizer Control Module. It energizes transponder and transmits the
FIX CODE (FC) and data between transponder and Immobilizer
Control Module.
As main function, Immobilizer Control Module checks if FC trans-
mitted from transponder and that registered in Immobilizer Con-
trol Module (up to 5 different FC can be registered) match.
Immobilizer Control Module controls serial communication
between scan tool and ECM.
Immobilizer Control Module has 3 different values as the follows.
• Password (PWD): for accessing to program by means of
scan tool.
• SKC: for ECM and transponder to calculate with.
• FC: for checking if transponder is the registered one.
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