2008 Yamaha Snowmobiles FX NYTRO Factory Service Manual, Page 279Get this manual

2008 Yamaha Snowmobiles FX NYTRO Factory Service Manual, Page 279

FUEL INJECTION SYSTEM ECU SELF-DIAGNOSTIC FUNCTION The ECU is equipped with self-diagnostic function in order to ensure that
If the ECU detects an abnormal signal from sensor while the snowmobile is being driven, the warning light and self-diagnostic
warning indicator on the LCD flash to alert the rider that malfunction has occurred and the ECU provides the engine with
alternate operating instructions that are appropriate for the type of malfunctionWhen an abnormal signal is received from
sensor, the ECU processes the specified values that are programmed for each sensor in order to provide the engine with alternate
operating instructions that enable the engine to continue to operate or stop operating, depending on the conditionsSelf-Diagnostic-Function
table Fault code No12 13 14 15 16 21 22 25 26 30 Item Crankshaft position sensor Intake air pressure sensor (cylinders #1,
#2, and #3) (open or short circuit) Intake air pressure sensor (cylinders #1, #2, and #3) (hose line) Throttle position sensor