2006 Honda TRX680 Rincon Factory Service Manual, Page 325Get this manual
DRIVETRAIN SYSTEM 3EOT Sensor Open Circuit Inspection Turn the ignition switch OFFRemove the jumper wireDisconnect the PCM 33P (Gray) connector (page EOT SENSOR 2P (BLACK) CONNECTOR (Wire side of female terminal) B2 B28
6-54)Check for continuity between the PCM 33P (Gray) connector terminals and ECT sensor 2P (Black) connector terminals of the wire harness sideTOOL: Test probe 07ZAJ-RDJA110 Connection: B28-Yellow B2Greenred Is there continuity? YES NOReplace the PCM with new one, and recheck- Open circuit in Yellow wire Open circuit in Greenred wire