Parameters displayed

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 following tests can be activated 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 faults with the sensors, the control unit replaces the figure transmitted by the sensor with a Recovery value which, 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 with a «permanent» type memory (EEPROM), i.e. it keeps a record of the error even when the cause of the problem no longer exists and if the ignition is switched OFF and a «volatile» memory (RAM) 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 reconnced, the errors already examined will 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) with 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.