Self-Diagnosis Function; User Mode - Suzuki 125 Service Manual

30 RV125K7 ('07-MODEL)

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 is 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, the FI indicator light does not indicate the trouble 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.
FI INDICATOR LIGHT
INDICATION
----
FI indicator light turns ON.
*1
and blinks.
*2
FI