Self-Diagnosis Function; User Mode - Suzuki GW250 Service Manual

4-16 FI SYSTEM DIAGNOSIS

SELF-DIAGNOSIS FUNCTION

The self-diagnosis function is incorporated in the ECM. The function has two modes, "User mode" and
"Dealer mode". The user can only be notified by the LCD (DISPLAY) panel and LED (FI indicator light). To
check the function of the individual FI system devices, the dealer mode is provided. In this check, the special
tool is necessary to read the code of the malfunction items.

USER MODE

MALFUNCTION
"NO"
"YES"
Engine can start
Engine can not start "FI" letter
*1
When one of the signals is not received by ECM, the fail-safe circuit works and injection is not stopped. In
this case, "FI" and Odo/Trip/Clock are indicated in the LCD panel and motorcycle can run.
*2
The injection signal is stopped, when the crankshaft position sensor signal, tip-over sensor signal, #1 and #2
ignition signals, #1 and #2 injector signals, fuel pump relay signal or ignition switch signal is not sent to ECM.
In this case, "FI" is indicated in the LCD panel. Motorcycle does not run.
"CHEC": The LCD panel indicates "CHEC" when no communication signal from the ECM is received for 3
seconds.
For Example:
The ignition switch is turned ON, and the engine stop switch is turned OFF. In this case, the com-
bination meter does not receive any signal from ECM, and the panel indicates "CHEC".
If CHEC is indicated, the LCD does not indicate the trouble code. It is necessary to check the wir-
ing harness between ECM and combination meter couplers.
The possible cause of this indication is as follows;
Engine stop switch is in OFF position. Side-stand/ignition inter-lock system is not working. Ignition
fuse is burnt.
NOTE:
The FI indicator light B turn ON about 3 seconds after turning the ignition switch ON.
LCD (DISPLAY) A
INDICATION
Odo/Trip/Clock
Odo/Trip/Clock and
"FI" letters
*1
*2
FI INDICATOR LIGHT B
INDICATION
----
FI indicator light turns
ON.
FI indicator light turns
ON and blinks.
INDICATION MODE
----
Each 2 sec. Odo/Trip/
Clock or "FI" is indi-
cated.
"FI" is indicated
continuously.