Engine Coolant Temperature Sensor: Inspection

INSPECT ENGINE COOLANT TEMPERATURE SENSOR
1. Check the resistance.
  1. Using an ohmmeter, measure the resistance between the terminals.
    Resistance:
    
    20°C (68°F):
    
    2.32 to 2.59 kΩ
    
    80°C(176°F):
    
    0.310 to 0.326 kΩ
    
    NOTE: If inspecting the water temperature sensor in water, prevent water from flowing into the terminals. After inspection, wipe the water off the sensor.
    
    Fig 1: Engine Coolant Temperature Sensor Resistance Graph
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002