Brazil Posted September 18, 2012 Share Posted September 18, 2012 My passenger side eletric fans that are part of the viscous fan shroud do not rotate when car is hot? what could it be? Quote Link to comment Share on other sites More sharing options...
mellonman Posted September 18, 2012 Share Posted September 18, 2012 that electric fan i thought was for the auto box oil cooler, but i see you have a tt6 so its not that, maybe the actual fan is shoot try and see how free it spins with you hand Quote Link to comment Share on other sites More sharing options...
mwilkinson Posted September 18, 2012 Share Posted September 18, 2012 As above it's for the transmission cooler off an auto. Mine was converted to a 6 spd years ago so I wired it into the aircon circuit and it kicks in with the aircon fan now. Quote Link to comment Share on other sites More sharing options...
listy Posted September 18, 2012 Share Posted September 18, 2012 The small fan on the shroud iirc is for the air con iirc Both my manuals have had it, so its surely cant be for an auto box cooler. Quote Link to comment Share on other sites More sharing options...
mellonman Posted September 18, 2012 Share Posted September 18, 2012 the air con has another fan on the other side Quote Link to comment Share on other sites More sharing options...
Shane Posted September 18, 2012 Share Posted September 18, 2012 The fan in the shroud is for the AC I believe and comes on only under certain conditions, whereas the slightly larger fan on the other-side of the rad is controlled by a thermal switch at the bottom of the radiator and only comes in when the viscous fails or can not cope, rarely. There is a thread on here where CW explains it in this way. The autobox cooler is simply a single pass in the bottom tank of the radiator therefore can not have it's own fan, instead relying on the coolant, stat and viscous/electric fans to maintain the temps within a comfortable range. Quote Link to comment Share on other sites More sharing options...
mellonman Posted September 18, 2012 Share Posted September 18, 2012 The fan in the shroud is for the AC I believe and comes on only under certain conditions, whereas the slightly larger fan on the other-side of the rad is controlled by a thermal switch at the bottom of the radiator and only comes in when the viscous fails or can not cope, rarely. There is a thread on here where CW explains it in this way. The autobox cooler is simply a single pass in the bottom tank of the radiator therefore can not have it's own fan, instead relying on the coolant, stat and viscous/electric fans to maintain the temps within a comfortable range. dont agree totally you might have the fans around the wrong way, As i know for a fact that my fan in the suround come on when i was accelerating hard and braking hard for a little time and when i pulled up the fan was on,so yes could well be a over flow type thing for the viscous fan, but not the a/c as i didnt have it on best way to tell is look at the manuals on the front page and see if a stock tt6 has one or if its named in the manuals Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 18, 2012 Share Posted September 18, 2012 (edited) Coolant section of the WSM Page CO29 has all your answers They are an electric back up for the viscous fan to assist engine coolant cooling PS: if your going to check if their seized use a piece of wood or similar just incase they come on Edited September 18, 2012 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Tyson Posted September 18, 2012 Share Posted September 18, 2012 (edited) Coolant section of the WSM Page CO29 has all your answers They are an electric back up for the viscous fan to assist engine coolant cooling PS: if your going to check if their seized use a piece of wood or similar just incase they come on Reminds of an incident with a mincer at work, we used to call the guy stumpy. It's amazing how stupid some people are Edited September 18, 2012 by Tyson (see edit history) Quote Link to comment Share on other sites More sharing options...
Shane Posted September 19, 2012 Share Posted September 19, 2012 dont agree totally you might have the fans around the wrong way, As i know for a fact that my fan in the suround come on when i was accelerating hard and braking hard for a little time and when i pulled up the fan was on,so yes could well be a over flow type thing for the viscous fan, but not the a/c as i didnt have it on best way to tell is look at the manuals on the front page and see if a stock tt6 has one or if its named in the manuals Are you sure that what you are hearing isnt the larger electric fan in front of the rad? On mine the smaller fan comes in only in really hot conditions when the AC is on. The larger fan I have only had switch in after several foot on brake at 2000 rpm while in drive launches at pod. Also, the sensor plug at the bottom of the rad has normally closed contacts, so if you pull the plug on the sensor the relay operates and the large fan comes on regardless of the temp making it very easy to check. I tried this on mine last night and sure enough only the large fan kicks in, not the smaller one in the shroud suggesting this is triggered from another sensor or at least the relay to this gets its supply on when the AC is on at the same time as the larger fan has been activated. CW and LeeP also seem to go along with this: http://www.mkivsupra.net/vbb/showthread.php?69226-Electric-Fan-on-the-rad&highlight=small+electric+fan http://www.mkivsupra.net/vbb/showthread.php?271364-Plug-at-the-bottom-of-the-rad&highlight=small+electric+fan So maybe there are variations, but that would surprise me (other than between UK and Jspec). Would be nice to know for sure. Coolant section of the WSM Page CO29 has all your answers They are an electric back up for the viscous fan to assist engine coolant cooling PS: if your going to check if their seized use a piece of wood or similar just incase they come on Would you send me a link to this please Dunk. Is it possible that there were changes through the production run, or differences in models? Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 19, 2012 Share Posted September 19, 2012 (edited) http://www.turbosupras.com/pdfs/JZA80%20TSRM/CO.pdf CO 29 3/4 of the way down Go to the home page of the forum and in the top left click on the repair manuals Edited September 19, 2012 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Alex Posted September 19, 2012 Share Posted September 19, 2012 It's a facelift - they have additional fans! There is a connector near the bottom of the shroud/radiator - is it deffo attached? If you are out of options, cut the red wire (assuming you can solder and shrink wrap back together) and they run with just the ignition on...to prove they are working. Quote Link to comment Share on other sites More sharing options...
Shane Posted September 19, 2012 Share Posted September 19, 2012 It's a facelift - they have additional fans! There is a connector near the bottom of the shroud/radiator - is it deffo attached? If you are out of options, cut the red wire (assuming you can solder and shrink wrap back together) and they run with just the ignition on...to prove they are working. Indeed, that page shows two fans in the shroud not one. I can't see any reference to the larger electric fan in front of the radiator. So that info does not apply to all models. Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 19, 2012 Share Posted September 19, 2012 Larger electric fan infront of the radiator ? Quote Link to comment Share on other sites More sharing options...
Shane Posted September 19, 2012 Share Posted September 19, 2012 Larger electric fan infront of the radiator ? Yes, and its OEM. Quote Link to comment Share on other sites More sharing options...
mellonman Posted September 19, 2012 Share Posted September 19, 2012 i didnt hear it i could see it with my eyes that it was a the electric fan in the viscous fan suround, but as you say its probably a viscous fan back up mine only has the one electric fan on the suround i hava a 95 jspec rz-s auto TT Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 19, 2012 Share Posted September 19, 2012 The uk spec just has the viscous and 1 small electric fan in the corner of the rad. Quote Link to comment Share on other sites More sharing options...
mellonman Posted September 19, 2012 Share Posted September 19, 2012 The uk spec just has the viscous and 1 small electric fan in the corner of the rad. thats exactly what i have apart from that mine has the auto box connections Quote Link to comment Share on other sites More sharing options...
Shane Posted September 19, 2012 Share Posted September 19, 2012 Will take a photo of mine later. Its a 95 TT jspec. The sensor at the bottom of the rad operates the larger electric fan in front of the rad on mine and not the smaller fan in the cowl. My cowl looks the same though with a single fan and not with two as in the link to the wsm. Quote Link to comment Share on other sites More sharing options...
Suprab1 Posted September 19, 2012 Share Posted September 19, 2012 I was sure the large electric fan at the front was AC & the small bottom left hand side was a back up to the big fan. - - - Updated - - - I was sure the large electric fan at the front was AC & the small bottom left hand side was a back up to the big fan. Quote Link to comment Share on other sites More sharing options...
Alex Posted September 19, 2012 Share Posted September 19, 2012 I was sure the large electric fan at the front was AC & the small bottom left hand side was a back up to the big fan. They are, but the Facelift/VVTi had another setup. with twin additional leccy fans on the shroud. Quote Link to comment Share on other sites More sharing options...
Shane Posted September 20, 2012 Share Posted September 20, 2012 Page 242 of the wsm shows a NC water sensor (one in the bottom of the rad ) in series with a NC AC pressure switch in the relay control circuit. Bear in mind when you disconnect the water sensor the fan kicks in as its a NC sensor, then the same will happen when whatever pressure the AC pressure switch is monitoring tells it to open. So it seems on the application that that particular cct is for, the fans can be triggered either by water temp or a/c pressure. Quote Link to comment Share on other sites More sharing options...
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