2004-2007 Honda Aquatrax ARX1200N3/T3/T3D Factory Service Manual, Page 193Get this manual
FUEL SYSTEM (Programmed Fuel Injection) 3Engine Oil Temperature Sensor Ground Line Inspection Measure the voltage between the wire harness side connector terminalsConnection: Orange (+) Greenyellow () Is the voltage within 4.75 5.25 V? YES NO Replace the ECM with new one, and inspect again Open circuit in the Greenyellow wire Loose or poorly connected ECM gray connectorGreenyellow Orange ENGINE OIL TEMPERATURE SENSOR 2P BLACK CONNECTOR (viewed from the terminal side)
MIL 45 BLINKS (TCP SENSOR) (ARX1200T3T3D only)
Before starting the troubleshooting, check the TCP sensor connector for loose contacts or corroded terminals, and recheck if the MIL is blinking1Wastegate Control Solenoid Valve Inspection Connect the vacuum pump to the pressure relief hose of the wastegate control solenoid valveApply vacuum to the solenoid valveIs the vacuum maintained? YES NO GO TO STEP Faulty valvewastegate control solenoid SOLENOID VALVE VACUUM PUMP