Automotive electronic fan starts frequently,such phenomenon may result from wrong signals of an engine coolant temperature sensor that cause the engine control unit to believe that the engine coolant is too hot and to start the heat-dissipating fan for engine protection.
Another possible reason is short circuit of the power supply circuit of the heat-dissipating fan. Since the fault detector on hand is unable to communicate with the car, it is not possible to directly read data from the engine coolant temperature sensor.
Given that the engine failure indicator remains off and that the engine is cold started normally, the possibility of wrong signals from an engine coolant temperature sensor is ruled out. A decision is therefore made to examine the power supply circuit of the heat-dissipating fan.
Troubleshooting: The car was started again after replacing the heat-dissipating fan controller. After the ignition switch is turned on, the heat-dissipating fan didn’t start frequently any more, and worked normally when the engine coolant became hotter. The fault was therefore eliminated.
Name: electronic fan/200W/SIEMENS
Ref No. : 1K0959455DH/1K0959455ET/1KM959455E
Product system: electrical device
Brand: vika
Applicable models:
Skoda: OCT04–08/SUP08–15/YET10–18
VW: CA04–11/EOS06–11/GOLF04–07/GOPL05–07/JE06–11/PA06–11/TOU03–08
Seat: A3 04–13/A3CA08–13/ATT07–09
Audi: ALT04–15/LE06–13/TO05–09
