Good morning,
This is a complicated code to determine the failure. Do you have a scan tool?
https://www.2carpros.com/articles/how-an-electric-cooling-fan-works
I posted a description on how the system works below with some illustrations for you to view. I also attached a wire diagram for you to view as well. Make sure you check the fuses for power on both sides.
https://www.2carpros.com/articles/how-to-check-wiring
General Description
When the ambient air temperature is warm or the airflow across the engine is low, the engine coolant temperature can become hot. If the coolant temperature becomes too hot, it is possible that the engine could be damaged. The purpose of activating the engine compartment ventilation fan is to help reduce the engine coolant temperature to a level that is not threatening to engine performance and maintains the air conditioning system pressure at safe levels.
Electric fan is responsible for causing air movement around the engine coolant radiator. The amount of air movement caused by the fan is controlled based on the Vehicle Speed, coolant temperature, A/C pressure status, A/C switch request status, and A/C clutch state. A duty cycle is determined based on these input parameters. This duty cycle corresponds to fan speed which correlates to the amount of air movement caused by the fan. The increased air movement enhances the heat exchanger function of the radiator in the confined space of the engine compartment, thereby reducing the engine coolant temperature more quickly.
DTC Description
Checking PWM signals to cooling fan under detecting condition, if the PCM detects short to ground, to battery or open circuit, PCM sets P0480. MIL (Malfunction Indication Lamp) turns on when the malfunction lasts until consecutive two driving cycle.
Where is the fan wiring diagrams so you can see the fuses to check and how the system works. Check out the images (Below). Please let us know what happens.
Images (Click to make bigger)
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Monday, December 3rd, 2018 AT 5:00 AM
