HYOSUNG AQUILA 250 FI, Service Manual, Page: 21 / 90

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4-1-11 FI SYSTEM DIAGNOSIS
①
SELF-DIAGNOSIS FUNCTION ( )
The self-diagnosis function is incorporated in the ECU.
The function has two modes, “USER MODE” and “DEALER MODE”.
The user can only be notified by the “FI” check lamp “ ”
①
.
To check the function of the individual FI system devices, the dealer mode is prepared.
In this check, the special tool is necessary to read the code of the malfunction items.
◉ ◉
USER MODE
The “FI” check lamp “ ”
①
comes on for about three seconds whenever the ignition switch is set to “ON”
position with the engine stopped as a test of the injection system operation. The check lamp must go off after three
seconds.
If the check lamp comes on during normal engine operation, it means that the fuel injection system is not operating
correctly.
When this is the case, inspect the fuel injection system to refer to “Dealer mode”.