2004-2007 Honda Aquatrax ARX1200N3/T3/T3D Factory Service Manual, Page 230Get this manual
FUEL SYSTEM (Programmed Fuel Injection) 5TCP Sensor Inspection Connect the pressure hose to the wastegate control solenoid valveRemove the plug from the pressure hoseConnect the ECM 26P gray connectorReplace the TCP sensor with known-good oneReset the diagnostic memory in the ECM (page 8-11)Start the engine according to the flushing procedure (page 5-3) and increase the engine speed above 3,000 rpmCheck the TCP sensor with the HDSIs DTC 45-1 indicated? YES NO Replace the ECM with new one, and inspect again Replace the original TCP sensor with new oneTCP SENSOR
DTC 46-1 (MST SWITCH)
Before starting the troubleshooting, check the MST switch connector for loose contacts or corroded terminals, and recheck the DTC1MST Switch Signal Line Inspection Pull the safety lanyard clip off of the engine stop switchDisconnect the MST switch 2P connectorMST SWITCH 2P CONNECTOR