Self-Diagnosis Function - Suzuki FL125S Service Manual

8-29 FL125SDW

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 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 indicator light turns ON
*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 indica-
tor light is lighted and the motorcycle can run.
*2
The injection signal is stopped, when the crankshaft position
sensor signal, tip-over sensor signal, ignition signal, injector sig-
nal or ignition switch signal is not sent to ECM. In this case, FI
indicator light turns ON and blinks and the motorcycle can not
run.
When the ignition switch is turned ON, FI indicator light is lit for 2
seconds and thereafter remains unlit.
When the ignition switch is turned ON and the engine stop
switch is turned OFF. In this case, the speedometer does not
receive any signal from ECM, and the speedometer does not
light FI indicator light.
If FI indicator light is not lighted when turning the ignition switch
to ON position. The FI indicator light does not indicate the trou-
ble code.
It is necessary to check the wiring harness between ECM and
speedometer couplers.
The possible cause of this indication is as follows;
Engine stop switch is in OFF position. Fuse is burnt.
FI indicator bulb is burnt.
NOTE:
Until starting the engine, the FI indicator light turns ON.
The FI indicator light is also turned ON when engine tempera-
ture is high or oil pressure is low.
FI INDICATOR LIGHT
INDICATION
----
FI indicator light turns ON.
*1
and blinks.
*2