2009-2012 Honda MUV700 Big Red Service Manual, Page 159Get this manual
FUEL SYSTEM (PGM-FI) 4ECl Sensor Line Short Circuit Inspection Disconnect the PCM 33P gray connectorCheck for continuity between the wire harness side ECT sensor 2P connector terminal and groundConnection: Blackblueground ECT SENSOR 2P CONNECTOR (Terminal side of the wire harness)
Is there continuity?
YES NOShort circuit in the Blackblue wire- Replace the PCM with known good one and recheck
OTe 7-2 (EeT SENSOR HIGH VOLTAGE)
Before starting the troubleshooting, check the ECT sensor 2P connector for loose or poor tactsand recheck the DTC1ECl Sensor System Inspection Turn the ignition switch to ON (I)Check the ECT sensor with the HDS pocket tester