Engine Control Unit - Fiat Brava Service Manual

Bravo-Brava Electrical system
Fiat CODE
55.
The Fiat CODE system enables the operation of the engine control unit by means of an exchange of
codes.
When the ignition is ON (+15), the engine control unit sends a code request to the Fiat CODE control
unit; the latter responds and sends a secret code only after recognizing (via an aerial) a known electronic
key entered in the ignition switch.
After recognizing the code, the engine control unit changes over to the engine starting enablement con­
dition.
The engine control unit can only memorize the secret code by means of a particular procedure.
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ELETTROSTOP
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1. CODE warning light on instrument panel
2. Ignition switch with aerial
3. Fiat CODE control unit
4. Key with transponder
5. Engine control unit
A. Fuel injection/ignition control unit
(petrol) or fuel injection pump control
unit (diesel)
B. Electrostop (diesel)
6. CODE Card
7. Fiat/Lancia Tester
DESCRIPTION OF SYSTEM
Engine control unit
The engine control unit is the fundamental component of the Fiat CODE system as it contains the main
code (Master Code).
Depending on the model/version, the engine control unit consists of the following devices:
- Electronic fuel injection-ignition control unit for petrol versions with integrated fuel injection/ignition
system.
- Electronic fuel injection control unit for diesel versions with electronic pump.
- Electronic device integrated in the electrostop valve for diesel versions with mechanical fuel injection
pump.
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