GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: reedy20vturbo on 15 January 2014, 19:40
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hello, my aum 1.8t has thrown the 17704 code, error in mapped cooling system, I've noticed that the temperature gauge would get up to 90 when I'm in. slow traffic and sometimes stay at 90 but other times as soon as I drive it would.drop to.cold, I've replaced both thermostat and temp sensor but still this problem continues, has anyone had this problem before? thanks :)
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Strange if you have replaced both. Did you clear the codes afterwards?
Might be worthwile checking the temps on vagcom (if you have it) and refit the thermostat, even take it back and get a replacement.
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Did you use genuine parts or cheap ones?
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yes mate I have vag com and I used genuine parts got them both from tps, and g12 coolant, I've cleared the code but haven't checked yet, I will do in the morning, just thought it was a bit strange
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Did you refit the o-ring the correct way when you changed the thermostat?
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I think so, what's the right and wrong way? I just took the car for a drive and it stays on the first 3 close lines on the gauge for however long I drive it but the second stop it climbs to 90? vag com also says the temperature. of the coolant is70 degrees and the gauge says 90 so it must be running very cold when I drive it? I'm stuck with what to do next?
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You might have a air lock.
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the o ring goes on the outside of the thermostat. It'd probably leak if you did it the wrong way.
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yeah that's how I did it :) how will I know if I have an air lock? I heard people saying water pump but I didn't think.it could as coolant seems to flow fine
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Could be a long shot, but is there not 2 different coolant sensors on the AUM?
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I think it's just a green top one witch does both, drove the car about 20 miles this morninga nd it sat at cold the whole.time until I stopped
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Could be a faulty thermostat. I personally get replacement thermostat or even chuck it in a pan of water with a thermometer and see if it opens.
Sounds like one of the 2 parts you have replaced aint doing its job. But if the thermostat was faulty and running the engine cool, I would expect the temp readings to be at 70 as it is overcooling??
Im sure I read somewhewre a while ago there was 2 coolant sensors. Perhaps not then.
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are the heaters blowing hot air out? did you turn them on and run car when you added coolant?
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that's what I'm being told, I'll get another thermostat and see what happens it's a pain in the ass to fit though! haha yeah it says on vag com it's at about 65-70 degrees, soon as I stop it'll climb to 90, yeah I had the heaters on hot when I.was adding coolant, and it blows hot air on.the hot setting and cold air on the cold setting
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bump
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I have the same problem with my AUM, had waterpump changed and whilst changing that they changed my coolant temp sensor and thermostat, after I noticed that temperature wouldnt reach 90 after warmed up after a motorway blast. But once stopped idleing it would reach 90.. i've also noticed that my fans dont work correctly with air conditioning unit, the small fan stays on when engines running, and when air conditioning is activated the fan switches its self of, unplugged the relay for the air conditioning and now the fan doesnt run on, but now when the can eventually reaches correct temperature, the small fan activates to cool the engine down?.. is that normal? Shouldnt the main BIGGER fan activate instead? Any help or advice? ? Thanks, grant