2008 Yamaha Snowmobiles FX NYTRO Factory Service Manual, Page 300Get this manual

2008 Yamaha Snowmobiles FX NYTRO Factory Service Manual, Page 300

FUEL INJECTION SYSTEM Er-1 Fault code NoEr-2 Er-3 Er-4 Diagnostic code No Order Itemcomponents and probable cause Connections
to "RUN" and turning the main switch on Check the coupler for any pins that may have pulled outCheck the locking condition
of the couplerIf there is malfunction, repair it and connect the coupler securelyRepair or replace if there is an open or
short circuitBetween speedometer unit coupler and ECU couplerBlueYellow BlueYellow Replace the speedometer unitReplace the
ECU Open or short circuit in wire harness andor speedometer unit sub-lead Malfunction in speedometer unitMalfunction in ECU