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Theory of Operation

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

The Powertrain Control Module (PCM) sends a signal to the Totally Integrated Power Module (TIPM) to turn the cooling fan on or off depending upon the engine coolant temperature. The low speed cooling fan is commanded on when the temperature is at or above 103° C (217° F) and turned off at or below 101° C (214° F). The high speed cooling fan is commanded on when the temperature is at or above 108° C (226° F) and turned off at or below 105° C (221° F).

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