Fiat 1995 Brava, Service Manual

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Bravo fti
20v
E n g i n e
Fuel system
10.
Parameters displayed
Engine rpm
Injection time
Advance
Intake air temperature
Coolant temperature
Butterfly valve opening angle
Battery voltage
Lambda sensor
Self-adjustment
Flow meter
Engine knocking (detonation)
Vehicle speed
Petrol vapour cut out solenoid valve
Fiat CODE
Mileage travelled
Active diagnosis
The following active tests can be carried out using the Fiat/Lancia Tester:
- Phase transformer
- Injector
- Failure warning light
- Petrol vapour solenoid valve
- Air conditioning
- Idle speed actuator
- Cancelling errors.
If there are problems with the sensors, the control unit replaces the value transmitted by the sensor with
a so called Recovery value which, depending on the different problems, is stored in the control unit
memory or is specially reconstructed from the other information available, in order to allow the vehicle to
reach a service centre.
This value is also transmitted to the Fiat/Lancia Tester, therefore, during the fault diagnosis it is worth
bearing in mind that in the case of problems the Fiat/Lancia Tester will signal the error for the sensor
concerned and the Recovery value will be displayed.
Permanent memory
The control unit is equipped with a «permanent»type errors memory ( E E P R O M ) , i.e. the error indication
is preserved even if the cause of the problem no longer exists and the key has been turned to the O F F po-
sition; it also has a «volatile» type memory (RAM) which, on the other hand, loses the error information
as soon as the cause disappears.
This also allows the more effective detection of errors of an occasional nature.
Before ending the fault diagnosis the contents of the «permanent» memory should be cancelled using
the Fiat/Lancia Tester in Active Diagnosis.
The contents of the «permanent» errors memory can be cancelled in the following ways:
1 - Using the Fiat/Lancia Tester in active diagnosis.
If this is not the case, when the Fiat/Lancia Tester is reconnected the errors already examined are sig-
nalled.
2 - If the cause of the error is no longer present and the engine has been started up 5 times (working for
^ ^ ^ e a s t 20 minutes) with a gap of at least 2 minutes between one starting and the next.
Disconnecting the control unit from the system, even for long periods of time, does not cancel
the contents of the ((permanent)} memory.
Recovery
Copyright by Fiat Auto
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