2006 Honda TRX680 Rincon Factory Service Manual, Page 314Get this manual
DRIVETRAIN SYSTEM Front VS Sensor Output Line Inspection Measure the voltage between the front VS sensor 3P (Blue) connector terminals of the wire harness sideConnection: Pinkwhite (+)Green (-) Is the voltage about V? NO YESOpen or short circuit in the Pinkwhite wire- GO TO STEP 4FRONT VS SENSOR 3P (BLUE) CONNECTOR (Wire side of male terminal)
4Front VS Sensor Inspection Turn the ignition switch OFFReplace the front VS sensor with new one (page 18-12)Clear the DTC, test ride the vehicle and recheck the DTCIs the DTC 12-1 indicated? YES NOReplace the PCM with new one, and recheck- Faulty original front VS sensor