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Radiator fans won't run 2007 Hyundai Tiburon GT
I have replaced the coolant temperature sensor the thermostat and fan still won't cut on unless the AC is on could this be a water pump issue or something else
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Has the coolant reached the correct temperature for the fans to come on?
When I replaced my radiator (due to a leak), it took a very long time before the fans came on But, turn the AC on and the fans instantly turned on. As I understand the cooling system on my car ... The ECM send a signal to the engine control relay which sends a power to the radiator fan relay The ECM provides a ground path to turn on the fan The ECM gets it signal from the engine coolant temperature sensor to turn fan on or off If you replaced the ECT then maybe check the voltage and grounds on the sensor? The fan relays are good cause turning the AC on .. turns the fans on. Good luck |
Originally Posted by avisitor
(Post 53199)
Has the coolant reached the correct temperature for the fans to come on?
When I replaced my radiator (due to a leak), it took a very long time before the fans came on But, turn the AC on and the fans instantly turned on. As I understand the cooling system on my car ... The ECM send a signal to the engine control relay which sends a power to the radiator fan relay The ECM provides a ground path to turn on the fan The ECM gets it signal from the engine coolant temperature sensor to turn fan on or off If you replaced the ECT then maybe check the voltage and grounds on the sensor? The fan relays are good cause turning the AC on .. turns the fans on. Good luck |
To check for grounds, I have used the test light
One side on battery positive and the probe side to where I want to see ground If it lights then good ground If it doesn't light up then bad ground Note always be careful when dealing with ground paths provided by the ECU. Don't want to fry the ECU!!!! Multi-meters aren't expensive anymore. A cheap one will cost around $20. A decent one will be more like $60. And a good one will be in the couple of hundred range Sounds like the fans should be turning on. The AC turns fans on instantly but the fans aren't coming on by themselves?? That means the fans are okay. They can get power and ground. It is just the ECU is not telling it to do so. ECT was replaced. But, don't know if the wiring is good?? |
Ground cheack
Originally Posted by avisitor
(Post 53210)
To check for grounds, I have used the test light
One side on battery positive and the probe side to where I want to see ground If it lights then good ground If it doesn't light up then bad ground Note always be careful when dealing with ground paths provided by the ECU. Don't want to fry the ECU!!!! Multi-meters aren't expensive anymore. A cheap one will cost around $20. A decent one will be more like $60. And a good one will be in the couple of hundred range Sounds like the fans should be turning on. The AC turns fans on instantly but the fans aren't coming on by themselves?? That means the fans are okay. They can get power and ground. It is just the ECU is not telling it to do so. ECT was replaced. But, don't know if the wiring is good?? |
Saw this today.
May have nothing to do with you But thought it was interesting |
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