Mazda Workshop Service and Repair Manuals

Engine - Coolant Temperature Sensor/Switch: Testing and Inspection

1.  

Disconnect the water thermosensor connector.

Water Thermosensor Inspection

2.  

Connect an ohmmeter to the sensor terminals.

3.  

Check the resistance of the sensor.

COOLANT TEMPERATURE      

RESISTANCE (KOHMS)

-20°C (-4°F)         

14.6-17.8

20°C (68°F)         

2.2-2.7

40°C (104°F)         

1.0-1.3

60°C (140°F)         

0.5-0.65

80°C (176°F)         

0.290-0.354