Caravan, Grand Voyager, Town and Country, Voyager, 2000-2004

Operation

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The engine coolant temperature sensor is a variable resistor with a range of -40F-265F (-5C-129C).

The engine coolant temperature sensor provides an input voltage to the PCM. As the coolant temperature varies, the sensor resistance changes resulting in a different input voltage to the PCM.

When the engine is cold, the PCM will demand slightly richer air/fuel mixtures and higher idle speeds until normal operating temperatures are reached.

The engine coolant temperature sensor is also utilized for control of the cooling fan.

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Fig.



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Fig.



Click image to see an enlarged view

Fig.

 
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