Active Diagnosis - Fiat 1998 Marea Service Manual

Engine
Fuel system
10.

Active diagnosis

When in active diagnosis mode, some components can be activated and certain specific functions can
be carried out, e.g. the error deletion command described in the following table.
During active diagnosis, the ignition key must be turned to MAR and the engine must be running for
certain functions.
Function/Actuator
Electric fuel pump
Injectors
Ignition coils
Error deletion command
Fuel vapour solenoid
Rev counter
Air conditioner relay
Injection system failure warning light
Excessive coolant temperature warning light
Engine idle speed actuator
Fiat CODE
Radiator fan
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Marea-Marea
Activation mode
Relay activation for 30 s
Activation for 4 ms in each s for 5 times
Activation for 2 ms in each s for 5 times
Validated error deletion
Activation for 20 ms in each s for 7 times
Activation at 125 Hz for 2 s
Relay activation for 30 s
Warning light activation for 30 s
Warning light activation for 10 s
Activation for 32 forward/backward steps
Recovery procedure to allow engine start-up
Activation for 10 s at both high and low
speed
Weekend^
1998 range
Publication no. 506.763/09