2005 Kawasaki STx-12F Jet Ski Factory Service Manual., Page 79Get this manual
FUEL SYSTEM (DFI) 3-31 Inlet Air Pressure Sensor (Service CodeCharacter-12bOSt)
If the reading is within the standard range, and check the input voltage at the sensor connectorDisconnect the inlet air pressure sensor connector and connect the harness adapter [A] between the harness connector and inlet air pressure sensor connectorConnect digital meter to the harness adapter leads[B] Inlet Air Pressure Sensor
Special ToolSensor Harness Adapter: 57001-1561 Inlet Air Pressure Sensor Input Voltage io te+[te)[D ]
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 Sensor Connector Standard: 4.75 5.25 DC
n FF Tfutrhethreaignnitgions souittcof Othe standard range, check the di wiring (see wiring diagram in this section)I the rethe the output voltage