CODE - Description

Description

To increase protection against theft attempts, an electronic immobilizer system known as the 'FIAT CODE system has been adopted.

The keys are equipped with an electronic transponder which transmits a coded signal to a special electronic control unit in the Body Computer. This allows the engine to be started if the code is recognised.

The code used in the communication, which takes place via aerial, changes each time the car is started up (rolling code). The code cannot therefore be reproduced, even with electronic scanners.

The main function of the Code control unit is to identify the code in the ignition key. The control unit contains a secret code which is used to communicate with the key Transponder. The body computer contains all enabled key codes in its memory, together with the code used in the communication between the body computer and the engine management unit. When the key is turned to MAR for for the first time, if the key is identified correctly, the code is transferred to the engine management unit and is then indelibly linked to the body computer.

The two units communicate via a two-way serial line.

Passive entry

Description

The CODE aerial, positioned co-axially on the ignition switch, is not present: the various Passive Entry aerials which recognize the presence of the CID inside the passenger compartment and notify the Passive Entry control unit which sends the go ahead for starting to the Body Computer via the CAN network are located in the passenger compartment.

Description

The function also allows status to be displayed via the activation of the CODE warning light in the instrument panel and connected via the CAN network.

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