nissan Workshop Repair Guides

Nissan and Datsun Workshop Service and Repair Manuals

Thermostat, Engine Cooling > < Radiator Fan Thermal Switch <--> [Radiator Cooling Fan Temperature Sensor / Switch]|Description and Operation
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Radiator Fan Thermal Switch: Testing and Inspection

Fig. 28  Testing Thermo Switch

1. Remove thermo switch/sensor, refer to COMPONENT R&R PROCEDURES/THERMO SWITCH/SENSOR. 
2. Connect suitable ohmmeter across switch terminals, then immerse lower part of switch in water, Fig. 28. Ohmmeter should indicate an open

circuit.

3. Place thermometer in water and heat. When water temperature reaches approximately 185°F, switch contacts should close and the ohmmeter

should indicate continuity.

4. If switch does not operate properly, replace it.

Thermostat, Engine Cooling > < Radiator Fan Thermal Switch <--> [Radiator Cooling Fan Temperature Sensor / Switch]|Description and Operation