2005 Kawasaki STx-12F Jet Ski Factory Service Manual., Page 74Get this manual
3-26 FUEL SYSTEM (DFI) Throttle Sensor (Service CodeCharacter-11tPS)
u is Terrnththesitgnitbounttow.itch ON and push the lanyard key und op Pushing the start button, run the engine seconds at idling to measure the sensor input voltage
Wait 15 seconds before using the starter againInput Voltage at ECU taC
gt tO Tfutrhnetheeaidinigioonf snwiucthvoltFF.e is less than the standard, ip ag check the ECU for its ground, power supply and wiring shortedIf the ground, power supply and wiring are good, replace the ECUIf the input voltage is within the standard range, check the input voltage at the throttle sensor connectorRemove the air filter temporarily (see Air Filter Removal)