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Is that possible? Is it possible that the turn signals are operated through the cpu? I know that the heater fan can continue to run on this car with the ignition turned off.
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I would look at the ect being bad. That's the first thing in line for that circuit after battery voltage. This is how the circuit work's the Fan's will only run if key is on.
You turn on key which sends battery voltage to system the system is on standby at this time. When the ect (engine coolant temp) sensor notice coolant has reached a set temperature it sends a signal to the relay to start fans running . When the temperature drop to a set amount it stops signal and fans turn off.
Do this take vehicle to dealer and have them replace ect . Even if it was a stuck relay there would be no power going to it
Hi S, The fan is not controlled through or by the ECU. I suggest you check the connection to the fan temperature sensor. If it is disconnected the fan will operate. Refit the connector and make sure the connection is making good contact. If the fan continues to run make sure that the relay is not fused and that it is operating correctly. Regards John
Hello, this sounds like a Radiator Fan Relay problem. There are several parts which make the fan work and one can certainly be a resistor. There are two Temperature switches for the water, one for the dash gauge and the other for the Radiator fan.
When the water heats up enough, the Temperature sensor (using variable resistance), sends a signal to the Relay to trip. The magnetic in the Relay will continue to work until the resistence is diminished by cooler temperatures at the sensor.
At this point, you do not know if the signal is going to the Relay or not. The Relay may be bad and doing nothing with the signal. If you have a continuity tester (Ohmmeter) you can bridge the connector on the Relay to see if the magnetic coil inside is burned out(Not making a connection).
I would just use an Ohmmeter, not Voltage because the fine wires in the Relay coil can burn up from Voltage.
There is the possibility the fan motor itself is bad, but unless you can isolate the connector and see where 12 volts is going into the fan, do not short it out. But if you are confident you can test the fan with 12 Volts go ahead.
Your Heater Power control module is bad I just had the same problem you can find it right behind the glove box it is mounted in the heater duct very easy to fix 2 screws and it is out and cost is about 150.00 at the dealer it is a dealer only part.
they are in the corner of the front by the bottom of the radiator rite below the air fillter assembaly bolted to frame two bolts size 5/16 socket it has 4 wires it is small but with the problems it sounds just like the problem i personaly had this week i would change the coolant senser first it goes for about $29.00 at autozone, just so you know the coolant senser tells your cpu to turn the fans on and the the cpu turns the relay on and then the fans turn on
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