2006 Honda TRX680 Rincon Factory Service Manual, Page 136Get this manual
FUEL SYSTEM (PGM-FI) 3MAP Sensor Input Voltage Inspection Turn the ignition switch OFFRemove the jumper wireTurn the ignition switch ON and engine stop switch "O"Measure the voltage at the wire harness side terminalsConnection: Brown (+)Greenred (-) te the voltage within 4.755.25V? YESGO TO STEP 4NOOpen circuit in Greenred or Brown wire MAPTP SENSOR 5P (BLACK) CONNECTOR (Wire side of female terminal)
4MAP Sensor Output Line Open Circuit Inspection Turn the ignition switch OFFDisconnect the PCM 33P (Gray) connectorCheck for continuity of the Light green wire between the MAPTP sensor 5P (Black) connector terminal and the PCM 33P (Gray) connector terminalTOOL: Test probe 07ZAJ-RDJA110 Connection: B25Light green te there continuity? YES NOReplace the PCM with known good one, and recheckOpen circuit in Light green wire PCM 33P (GRAY) CONNECTOR (Wire side of female terminal) MAPTP SENSOR 5P (BLACK) CONNECTOR (Wire side of female terminal)[II