2004-2005 Kawasaki STX-15F Jet Ski Factory Service Manual., Page 82Get this manual
3-34 FUEL SYSTEM (DFI) 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 to+le])[ ]
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 and d: .7 .2 C
n FF Tfutrhethreaignnitgions souittcof Ohe standard range, check the di wiring (see Wiring Diagram in this section)If the reading is good, the input voltage is normalCheck the output voltage