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Home >> Fiat >> 2016 >> 500 Turbo, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (Electric Vehicle Control Unit (EVCU) Module - DTCS P1139-00 To U1487-00 - 500 - Electric) >> DTC Troubleshooting >> P149A-00-Cooling Fan Module Internal >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.

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

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