Parameters Displayed; Active Diagnosis; Permanent Memory - Fiat Bravo Service Manual

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 knock (detonation)
Vehicle speed
Petrol vapour cut out solenoid valve
Fiat CODE
Atmospheric pressure

Active diagnosis

The f o l l o w i n g tests can be activated using the diagnostic equipment:
- Phase transformer
- Injector
- Failure w a r n i n g light
- Petrol vapour solenoid valve
- Air conditioning
- Idle speed actuator
- Cancelling errors.
Recovery
If there are faults with the sensors, the control unit replaces the figure transmitted by the sensor w i t h a
Recovery value w h i c h , depending on the different problems, is either stored in the control unit memory
or is constructed specially using the other information available in order to allow the vehicle to reach a
Service Centre.

Permanent memory

The control unit is equipped w i t h a «permanent» type memory (EEPROM), i.e. it keeps a record of the
error even w h e n the cause of the problem no longer exists and if the ignition is switched OFF and a
«volatile» memory ( R A M ) where the information concerning the error is lost as soon as the cause of the
problem ceases.
This also allows the more effective identification of error of an occasional nature.
Before ending the fault diagnosis, the contents of the «permanent» memory should be cancelled using
the diagnostic equipment in Active diagnosis.
The contents of the «permanent» errors memory can be cancelled in the following ways:
1 - Using the diagnostic equipment in active diagnosis.
If this is not the case, when the diagnostic equipment is reconncted, the errors already examined w i l l be
signalled.
2 - If the cause of the error is longer present and the engine has been started up 5 times (running for at
least 20 minutes) w i t h an interval of at least 2 minutes between each starting up.
Disconnecting the control unit from the system, even for very long periods, does not cancel the
contents of the {(permanent)) memory.
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Bravo 0 i
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Print no. 506.670/16