LS 400 V8-4.0L (1UZ-FE) (1990)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
When performing the following tests, refer to Fig. 1.
Fig. 1 Cooling fan component locations
Using an ohmmeter, ensure there is no continuity when coolant temperature is above 93°C (199°F). Ensure there is continuity when coolant temperature
is below 83°C (181°F). If neither check is good, replace temperature switch.