2006 Honda TRX680 Rincon Factory Service Manual, Page 323Get this manual
DRIVETRAIN SYSTEM 4Failure Reproduction Connect the PCM and gearshift switch connectorsClear the DTC, turn the ignition switch ON and recheck the current DTCIs the DTC 42-1 indicated? NO YESIntermittent failure- Replace the PCM with new one and recheck
DTC 44-1 (EOT SENSOR LOW VOLTAGE)
1EOT Sensor System Inspection Turn the ignition switch ON and engine stop switch "o"Check the EOT sensor with the HDSIs about indicated? NOIntermittent failure Loose or poor connection on the ECT sensor 2P (Black) connector- GO TO STEP 2