2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 67Get this manual
1A-3 Engine General Information and Diagnosis: 1 When one of the signals is not received by ECM, the fail-safe circuit works and injection is not stoppedIn this case, "FI" light is lighted in the indicator panel and vehicle can run2 The injection signal is stopped, when the crankshaft position sensor signal, tip-over sensor signal, ignition signal, injector signal, fuel pump signal or ignition switch signal is not sent to ECMIn this case, "FI light" is lighted and blinked in the indicator panelVehicle can not runWhen ignition switch is turned ON, FI light is lit for seconds and thereafter remains unlitThe ignition switch is turned ON, and the engine stop switch is turned OFFIn this case, the indicator panel does not receive any signal from ECM, and the indicator panel does not light "FI light"If FI light is not lighted when turning the ignition switch to ON, the FI light does not indicate the trouble codeIt is necessary to check the wiring harness between ECM and indicator panel couplersThe possible cause of this indication is as follows; Engine stop switch is in OFF positionIgnition fuse is burntNOTE The FI light blinks quickly two times second when the engine coolant temperature becomes too high "A"