2003 Chevy TrailBlazer Radiator Cooling Fan: Description and Operation

download Cooling Fan Control The purpose of the Electro-Viscous (EV) fan clutch is to maintain powertrain cooling requirements. The Powertrain Control Module (PCM) monitors the following sensors to regulate the fan speed; – Engine coolant temperature sensor – A/C refrigerant pressure sensor – Vehicle speed sensor – Intake air temperature sensor – Transmission fluid temperature [...]