Communication Between Control Unit And Diagnostic Equipment; Parameters Displayed; List Of Errors; Active Diagnosis 6 - Fiat Bravo Service Manual

Bravo-Brava
'98 range
Communications between control unit and diagnostic equipment
In the engine compartment, there is a socket for connecting the diagnostic equipment.
The data exchange between control unit and diagnostic equipment takes place by means of a bidirec-
tional diagnostic line (line K) and the communication protocol follows the Key Word 2000 standard.
Data transmission takes place in NRZ positive logic at a baud rate of 10400 Baud.
The diagnostic equipment can provide the following information:
- Display of engine parameters;
- Display of errors;
- Active diagnosis.

Parameters displayed

Engine rpm
Fuel injection time
Absolute pressure in the inlet manifold
Intake air temperature
Engine coolant temperature
Throttle valve aperture angle
Battery voltage
Number of open/close steps of the engine idle
speed actuator
Advance
Rpm sensor
Throttle potentiometer
Absolute pressure sensor
Air temperature sensor
Coolant temperature sensor
Battery
Lambda probe
Fuel injectors
Ignition coils
Idle speed actuator
Fuel vapours solenoid
Actuators relays
Control unit
Self-adaptive parameters
Speed sensor
Knock sensor
Fiat CODE
Copyright Fiat Auto
ft
16v

List of errors

Mixture strength correction (Lambda probe)
Vehicle speed
Self-adaptivity
Error counter
Ignition coil charging time (Dwell)
Petrol vapours solenoid
Start counter
Engine load
Fiat CODE
Absence of signal
A.C.-D.C.
A.C.-D.C.
A.C.-D.C.
A.C.-D.C.
S u p p l y > 16.2V
S u p p l y < 6V
Implausible signal
D.C.
A.C.-D.C.
A.C.-D.C.
A.C.-D.C.
A.C.-D.C.
A.C.-D.C.
Operating faults in the microprocessor or con-
trol unit memories are indicated.
It is indicated whether the limits of self-adap-
tivity of the control unit have been reached.
This indicates that the engine conditions are
too far beyond the standards, so the causes
should be sought in mechanical faults.
Implausible signal
Speed exceeds maximum speed
A.C.-D.C.
Code not recognized or not received
E n g i n e
Fuel system
10.
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