Fans wont turn on
 

I have a 2003 Chevy Malibu that I am having problems getting the fans to turn on. All the relays and fuses are good and I can turn the fan on using the OBD 2 Computers. But they will not turn on by themselves when the engine gets to temperture. Temp Switch has be changed, new water pump and thermostat. I am stumped any suggestions?

Did you run a power switch to see if the fan is good did you all so check the relay

what do you mean you can turn the fan on using the OBD 2 Computers?

Does the ECM see the temperature of the engine? Just because you replace a part does not mean the part is good or is working.

^^What bear said. What does a scantool show the coolant temperature as?

Did you disconnect the battery when you changed the sensor?

All the relays and fuses are good. Using the scanner I was able to turn on the fans at all speeds. The Car had overheated due to a leaking water pump so I am not sure if this car has some kind of safe mode Feature. Im thinking a problem with the ECM

does the ecm read the cts temp correctly?

how do you mean?

Your right the gauge is up at 205 degrees but the scanner is at 95 degrees, Whats going on with this?

I reset the ECM and BCM seems like its working now geez. The most stupid things cause the biggest problems!!