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Home >> Fiat >> 2017 >> 500 E >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Electric Vehicle Control Unit (EVCU) Module - DTCS P1139-00 To U1487-00 - 500 - Electric >> DTC Troubleshooting >> P1A14-00 Radiator Fan Control Module Feedback Circuit >> Theory Of Operation

Theory Of Operation

The Electric Vehicle Control Unit (EVCU) sends a Pulse-Width Modulated (PWM) signal to the Radiator Fan Module to control speed.