Engine
Marea- Marea Weekend
IP>
99 range
Fuel system
10.
Parameters displayed
Engine rpm
Injection time
Advance
Intake air temperature
Engine 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 following active tests can be carried out using the diagnostic equipment:
- Phase transformer
- Injector
- Failure warning light
- Petrol vapour solenoid valve
- Air conditioning
- Idle speed actuator
- Cancelling errors
Recovery
If there are failures at the senors, the control unit replace the value transmitted by the sensor which a so-
called Recovery value which, depending on the different faults, is either stored in the control unit memory
or specially reconstructed using other available information, to allow the vehicle to reach a service centre.
Permanent memory
The control unit is equippd with a "permanent" type memory (EEPROM), in other words the error is pre-
served even if the cause of the problem no longer exists and the ignition has been switched OFF and a
"volatile" type memory (RAM) which loses the error information as soon as the cause of the problem dis-
appears.
This also allows the more effective identification of errors of an occasional nature.
Before ending the fault diagnosis, the contents of the "permanent" memory must be cancelled using the
diagnostic equipment in Active Diagnosis.
The contents of the "permanent" errors memory must be cancelled as follows:
1. Using the diagnostic equipment in active diagnosis.
If this is not the case, when the diagnostic equipment is reconnected, the errors already examined will be
signalled.
2. If the cause of the error no longer exists and the engine has been started 5 times (letting it run for at
least 20 minutes) with at least 2 minutes between each time the engine is started up.
Disconnecting the control unit from the system, even for very long periods, does not cancel the
contents of the "permanent" memory.
42
Print n° 506.763/14
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