2006 Honda TRX680 Rincon Factory Service Manual, Page 142Get this manual
FUEL SYSTEM (PGM-FI) 2IAT Sensor Inspection Turn the ignition switch OFFDisconnect the IAT sensor 2P (Black) connectorTurn the ignition switch ON and engine stop switch "O"Check the IAT sensor with the HDS pocket testerIs about indicated? YES NOGO TO STEP 3- Faulty IAT sensor
2P (BLACK) CONNECTOR 3IAT Sensor Output Line Short Circuit Inspection Disconnect the PCM 33P (Gray) connector from the PCM (page 6-43)Check for continuity between the IAT sensor 2P (Black) connector terminal of the wire harness side and groundConnection: Grayblueground te there continuity? YESShort circuit in Grayblue wire NOReplace the PCM with known good one, and recheck IAT SENSOR 2P (BLACK) CONNECTOR (Wire side of female terminal)
DTC 9-2 (IAT SENSOR HIGH VOLTAGE)
Before starting the inspection, check for loose or poor contact on the IAT sensor connector and recheck the DTC1IAT Sensor System Inspection Turn the ignition switch ON and engine stop switch "O"Check the IAT sensor with the HDS pocket testerIs about indicated? YES NOGO TO STEP 2- Intermittent failure Loose or poor contact on the IAT sensor connector