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#1
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cooling fan problem
Soon as I turn my key on both cooling fans come on even with the climate control off! Thanks, steve
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#2
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Quote:
The overall circuitry is quite complicated and involves several relays located in the distribution assembly, within the engine compartment. You could try removing these one by one, as a second test in an effort to locate the fault.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#3
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On my Legacy, disconnecting the water temp sensor causes the fan to turn ON. Is the SVX different?
Also, the sensors under the alternator are for crank position. The water temp sensor is under the intake manifold at the back on the drivers side (assuming LHD).
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Subaru ECU and TCU Website 1992 Alcyone SVX Version L 1992 Alcyone SVX Version L 1994 Alcyone SVX S40-II 2004 Subaru Legacy 2.5 SE Sports Tourer 1996 Subaru Legacy 2.2 GX Wagon 1988 Subaru Justy J12 SL-II Last edited by b3lha; 07-10-2007 at 02:40 AM. |
#4
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The control circuitry could very well be arranged as you suggest, in which case the test is to bridge the two sensor connector terminals and note if the fans stop running. Also look for an open circuit or bad connection rather than a short. The schematic appears to indicate a thermocouple, something I had not expected and have doubts about. I was dubious about the sensor position I had seen advised by another, hence my wording. Apologies and thanks for the correction. I sincerely hope that confusion is now not the end result of my post. Cheers, Trevor.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#5
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#6
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Hi guys, I tried bridging the wire conector on the temp sender and all that happens is the relays make noise. Any other ideas, where is the thermocoupler located? thanks steve
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#7
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Quote:
About all you can do is try removing relays as I have suggested, as a means of possibly localising the fault. Delving deeper will require in depth knowledge. Meantime follow your nose and look for a possible wiring, or connector fault.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#8
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Hello, yes I see the temp sensor and thermocoupler are the same. I thought you knew something I didnt. I did pull relays when the fans are on and fans do shut off. I will tear into it more just a matter of time. Thanks for you help, steve
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