2004 Bombardier Outlander 330/400 Factory Service Manual, Page 103Get this manual
Section 03 ENGINE Subsection 05 (COOLING SYSTEM)
TEMPERATURE SENDER
Remove temperature sender no18, see below for procedurePut the temperature sender in water and heat waterUsing multimeter, check the resistance from temperature senderTemperature sender should open when water temperature reaches the following degreeWATER TEMPERATURE 85C (185F)
Change temperature sender if resistance does not change when water temperature is equal or over specification