Fiat 1996 Brava Service Manual page 582

Bravo-Brava
98 range
Auxiliary units
Climate control
50.
AUTODIAGNOSIS
Using suitable control logics for the sensors and adjustment with "self-learning" for the actuators, the
electronic control unit is capable of recording and storing and series of problems and faults which can
occur in the system.
When confronted with these problems, the control unit continues to manage the operation of the system
replacing any incorrect values detected with appropriate recovery values which ensure a minimum level
of operation for the system even if it is not ideal.
Two types of errors are memorized:
- occasional errors, which are zeroed when the key is turned OFF
- permanent errors: if an error occurs more than 5 times in a certain period it is considered permanent
and is stored in the control unit memory; these errors are NOT zeroed when the key is turned OFF, but
only after a specific external command (diagnostic equipment).
The control unit has two methods for reading errors it is storing:
- by means of the diagnostic equipment
- through the display in the on board panel enabled by reading the outside temperature.
As an error detected by the control unit occurs (even an occasional type error), the words "Error Cli" ap­
pear on the on board panel display to indicate that the system has memorized a fault.
By pressing the "outside temperature" button in the centre of the dashboard if these words remain, this
means that the error involves the outside temperature sensor, if, on the other hand the correct tempera­
ture value appears, this means that the error relates to other system components and it is then possible to
identify the fault memorized through the following procedure;
MAR'
- Turn the left knob completely in a clock­
wise direction (HI position)
- Turn the right knob completely in a clock­
wise direction (MAX DEF position)
- Turn the centre knob (to position 0)
Turn the ignition key from the OFF position
to the ON position
Within 10 seconds, turn the centre knob,
placing it in the following positions:
"0" - "AUTO" - "0" - "AUTO" - " 0 "
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