2005 Ski-Doo Tundra, Skandic, Expedition Shop Manual, Page 329Get this manual
Section 06 ENGINE MANAGEMENT (4-TEC) Subsection 03 (COMPONENT INSPECTION AND ADJUSTMENT)
The resistance value of temperature sensor may test good at certain temperature but it might be defective at other temperaturesIf in doubt, try new sensorAlso remember this validates the operation of the sensor at room temperatureIt does not validate the over temperature functionalityTo test it, the sensor could be removed from the engine and heated with heat gun while it is still connected to the harness to see if the ECM will detect the high temperature condition and generate fault code
ECM Connector
CAUTION: Probe on top of terminal onlyDo not try to probe inside terminal or to use paper clip to probe inside terminal, it will damage the square-shaped terminal and this may lead to improper function of the engine management system