2007-2010 Kawasaki Ultra 250X/260X/260LX PWC Factory Service Manual, Page 106Get this manual
FUEL SYSTEM (DFI) 3-47 Vehicle-down Sensor (Service CodeCharacter-31dOS)
Turn the ignition switch OFF Remove the needle adapter set, and apply silicone sealant to the seals of the connector for waterproofingSealant-Liquid Gasket, TB1211: 56019-120
If the output voltage is normal, the wiring is suspectCheck the wiringIf the wiring is good, check the ECU for its ground and power supply (see ECU Power Supply Inspection)If the ground and power supply are good, replace the ECU If the output voltage is out of the specifiedreplace the vehicle-down sensor