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Cooling Fan Not Working
Posted 11 February 2009 - 01:58 AM
Posted 11 February 2009 - 10:28 AM
I think you can check to see if the fans are good by disconnecting the wiring connector, then "hot wiring" directly to 12V. I don't think it makes any difference which of the two wires is connected to positive to see if the fan s work. Connected one way, the fan blades turn clock wise, connected the other way the blades turn counter clock wise.
If this car has an automatic trans, suggest you drain and replace the ATF. There is a drain plug that is exactly like the oil pan drain plug for draining the ATF on the bottom of the trany. Subaru makes it easy to change the ATF. Unfortunately, only about half of the ATF can be drained at one time, the remaining ATF will not drain from the torque converter. So the ATF need to be changed at least three times, and driven between changes, to finally get a good overall fluid change.
Sounds like you are doing all the good maintenance on the car that it desperately needs. Hope your son is helping you with the work as well. It is a good opportunity for him to learn about car maintenance.
Posted 11 February 2009 - 12:24 PM
Posted 11 February 2009 - 01:58 PM
Its the so called D-check mode
Posted 11 February 2009 - 02:17 PM
Posted 11 February 2009 - 02:26 PM
is the car overheating?
one or 2 fans on the impreza, one or 2 not working?
Posted 11 February 2009 - 03:09 PM
Posted 11 February 2009 - 05:10 PM
switches to ON and see if one of the fans runs.
I agree it's probably a sensor.
Posted 11 February 2009 - 06:17 PM
You haven't really stated that you are sure that the fan operation is actually a problem. Are you sure the fan isn't working due to a problem, because normally it doesn't turn on unless the coolant starts to overheat.
I recommend you first connect the diagnostic connections together under the dash to test the fan circuit.
Posted 11 February 2009 - 07:24 PM
Posted 12 February 2009 - 05:35 PM
Posted 12 February 2009 - 07:12 PM
Posted 12 February 2009 - 11:16 PM
Posted 12 February 2009 - 11:48 PM
Posted 13 February 2009 - 12:01 AM
It doesn't matter how long the car runs. Unless the temperature gauge gets into the hot zone the fan should not turn on. By doing the test you proved that the fan circuit is good, though it did not prove the temperature sensor is ok. That is bypassed with the test.
plus, if the car never runs hot, what difference does it make if the fan works. as long as it runs cool it's ok. take it on the hiway for 15 minutes and then pull over and idle. if it runs cool it's ok. re check in 3 and 6 months.
Posted 14 February 2009 - 06:55 PM
Posted 14 February 2009 - 07:22 PM
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