2004-2007 Honda Aquatrax ARX1200N3/T3/T3D Factory Service Manual, Page 187Get this manual
FUEL SYSTEM (Programmed Fuel Injection) MIL 29 BLINKS (IAC VALVE) Before starting the troubleshooting, check the IAC valve connector for loose contacts or corroded terminals, and recheck if the MIL is blinking1IAC Valve Resistance Inspection Pull the safety lanyard clip off of the engine stop switchDisconnect the IAC valve 4P black connectorMeasure the resistance between the IAC valve side connector terminalsConnection: BlackWhite Blackyellow BrownWhite Brownyellow Is the resistance 30 70 #? YES NO GO TO STEP Faulty IAC valveIAC VALVE 4P BLACK CONNECTOR 2IAC Valve Line Short Circuit Inspection Disconnect the ECM 22P black connectorCheck for continuity between the wire harness side IAC valve connector terminal and groundConnection: Blackwhite Ground Blackyellow Ground Brownwhite Ground Brownyellow Ground Is there continuity? YES Short circuit in the Blackwhite, Black yellow, Brownwhite andor Brownyellow wire GO TO STEP 3WIRE HARNESS SIDE IAC VALVE CONNECTOR (viewed from the terminal side)