Fiat Bravo Service Manual page 582

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Table of Contents

A U T O D I A G N O S I S

Using suitable control logics for the sensors and adjustment w i t h "self-learning" for the actuators, the

electronic control unit is capable of recording and storing and series of problems and faults w h i c h can

occur in the system.

When confronted w i t h these problems, the control unit continues to manage the operation of the system

replacing any incorrect values detected w i t h appropriate recovery values w h i c h ensure a minimum level

of operation for the system even if it is not ideal.

T w o types of errors are memorized:

- occasional errors, which are zeroed w h e n 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 w h e n the key is turned OFF, but

only after a specific external command (diagnostic equipment).

The control unit has t w o 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 C l i " 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 f o l l o w i n g procedure;

Auxiliary units

- Turn the left knob completely in a clock-

wise direction (HI position)

- Turn the right knob completely in a clock-

wise direction ( M A X 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" - " A U T O " - "0" - " A U T O " - "0"

Climate control