2008-2010 Kawasaki KFX450R Factory Service Manual, Page 96Get this manual
FUEL SYSTEM (DFI) 3-39 Main Throttle Sensor (Service Code 11)
If the input voltage is less than the standard, remove the ECU and check the wiring between these connectorsDisconnect the ECU and sensor connectorsWiring Connection ECU Connector [A] Main Throttle Sensor Connector [B] LB lead (ECU terminal 15) BRBK lead (ECU terminal 9)
If 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 (see ECU RemovalInstallation)
Main Throttle Sensor Output Voltage Inspection
output at the main throttle sensor Measure the way as voltagevoltage inspection, Note the in the same input followingDisconnect the main throttle sensor connector and connect the harness adapter [A] between these connectorsSpecial ToolThrottle Sensor Setting Adapter: -1538 Main Throttle Sensor Output Voltage Connections to Adapter Meter (+) Meter () (sensor YW) lead (sensor BRBK) lead 57001