Coolant Temperature Sending Unit

Using hot water, warm-up sending unit. Measure resistance readings while warming up sending unit. SeeFig 1 . Resistance readings should be 134-179 ohms at 122° F (50° C), 48-57 ohms at 176° F (80° C) and 26-29 ohms at 212° F (100° C).

Fig 1: Testing Coolant Temperature Gauge & Sending Unit

Courtesy of SUZUKI OF AMERICA CORP.