2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 353Get this manual
COOLING SYSTEM
C0NTINUITY
6.Thermo switch (radiator) Remove the thermo switch (radiator) from the radiatorConnect the pocket tester10) to the thermo switch (radiator) 1Immerse the thermo switch (radiator) in coolant 2Check the thermo switch (radiator) for continuityWhile heating the coolant use thermometer to record the temperaturesTest step
Coolant temperature Continuity Thermo switch (radiator) Less than 86 NO (186.8 5.4 F) More than 86 YES (186.8 5.4 F) More than 80 YES (176 5.4 F) Less than 80 NO (176 5.4 F) Test steps2: Heating phase Test steps4: Cooling phase