KamaSupra Posted May 27, 2017 Share Posted May 27, 2017 Hi, my Supra is being silly and so I'm looking for help please!! My Supra is a TT6 facelift and has the snow mode button. For no apparent reason the snow mode keeps coming on itself and killing the power by 25% (I've read snow mode does this when activated). It doesn't matter if I'm sat with the Supra idling, going at a constant speed or accelerating hard. It will just come on itself every 1 minute or so even if I turn it off on the snow mode button. Anyone able to shine any light on this issue please? Thanks!! Dave Quote Link to comment Share on other sites More sharing options...
Tyson Posted May 27, 2017 Share Posted May 27, 2017 (edited) Isn't that only on autos ? I've never seen that on a manual, has it been converted from an auto ? Nope I see tt6 facelifts had it too. Every days a school day Edited May 27, 2017 by Tyson (see edit history) Quote Link to comment Share on other sites More sharing options...
Scooter Posted May 27, 2017 Share Posted May 27, 2017 in the short term is there a TRAC fuse in the main engine bay fuse box you can remove? Quote Link to comment Share on other sites More sharing options...
evinX Posted May 27, 2017 Share Posted May 27, 2017 Short on the button/ switch/ connection from vibrations from the car? Had the dash panels out recently?? Youd be supprised how much rattling can go on in a car even though it feels smooth Quote Link to comment Share on other sites More sharing options...
KamaSupra Posted May 27, 2017 Author Share Posted May 27, 2017 Isn't that only on autos ? I've never seen that on a manual, has it been converted from an auto ? Nope I see tt6 facelifts had it too. Every days a school day Yep manuals have it too in the short term is there a TRAC fuse in the main engine bay fuse box you can remove? That's all I could find that I could do till it's sorted. Short on the button/ switch/ connection from vibrations from the car? Had the dash panels out recently?? Youd be supprised how much rattling can go on in a car even though it feels smooth Dash panels haven't been off since early last year, it seems to turn off for a minute or so when I manually turn it off before coming back on again Quote Link to comment Share on other sites More sharing options...
Pete Posted May 28, 2017 Share Posted May 28, 2017 Wasn't this a symptom of dodgy speed converter or odd way to wire in the facelifts? Can't remember now. Quote Link to comment Share on other sites More sharing options...
KamaSupra Posted May 30, 2017 Author Share Posted May 30, 2017 Wasn't this a symptom of dodgy speed converter or odd way to wire in the facelifts? Can't remember now. I guess that's something to be looked at then thanks I'm surprised nobody else has had this problem too Quote Link to comment Share on other sites More sharing options...
GreaseMonkey Posted June 1, 2017 Share Posted June 1, 2017 (edited) I'll agree with Pete on the possiblity of dodgy speedo converter or it's wiring, as after having searching on the interwebz I found a VVTI Supra EWD http://wilbo666.pbworks.com/w/page/57949268/2JZ-GTE%20VVTi%20JZA80%20Supra%20Engine%20Wiring#JZA80ElectricalWiringDiagramBook6742505 , (admittidly in Japanese but using the pre facelift wiring diagram for the abbreviations and circuit symbols worked out which circuit was what) It appears the Snow warning Light Circuit runs between the Engine ECU & Speedo (as shown on the diagram) if followed up from the Engine ECU (Left Middle) SNWO Terminal to the SNOW Bulb follow that past the Fuse and along to the right of the diagram, then down to the Unit I'm assuming is the Speedometer (Gauge Symbol) as when following the other output (not earth/ ground) it leads back to the Engine ECU terminal SP1 which to me looks like Speedometer Terminal. Edited June 1, 2017 by GreaseMonkey (see edit history) Quote Link to comment Share on other sites More sharing options...
TuneR Posted June 2, 2017 Share Posted June 2, 2017 Only time it comes on in my triptronic is when the wheels have broken away fairly bad and then i remember to turn the TC off. Quote Link to comment Share on other sites More sharing options...
Burna Posted June 2, 2017 Share Posted June 2, 2017 Could be a intermittently faulty ABS sensor. Quote Link to comment Share on other sites More sharing options...
KamaSupra Posted June 2, 2017 Author Share Posted June 2, 2017 I'll agree with Pete on the possiblity of dodgy speedo converter or it's wiring, as after having searching on the interwebz I found a VVTI Supra EWD http://wilbo666.pbworks.com/w/page/57949268/2JZ-GTE%20VVTi%20JZA80%20Supra%20Engine%20Wiring#JZA80ElectricalWiringDiagramBook6742505 , (admittidly in Japanese but using the pre facelift wiring diagram for the abbreviations and circuit symbols worked out which circuit was what) It appears the Snow warning Light Circuit runs between the Engine ECU & Speedo (as shown on the diagram) if followed up from the Engine ECU (Left Middle) SNWO Terminal to the SNOW Bulb follow that past the Fuse and along to the right of the diagram, then down to the Unit I'm assuming is the Speedometer (Gauge Symbol) as when following the other output (not earth/ ground) it leads back to the Engine ECU terminal SP1 which to me looks like Speedometer Terminal. [ATTACH=CONFIG]219248[/ATTACH] Cheers dude, definitely something to look at. I'll find someone to make more sense of the diagram for me but it's good you've found that Only time it comes on in my triptronic is when the wheels have broken away fairly bad and then i remember to turn the TC off. Same, just now it comes on regardless of moving or staying still and comes on even if I've turned the traction control off Could be a intermittently faulty ABS sensor. I was thinking a sensor too, it's such a pain. I just can't enjoy the car till I get it sorted. Quote Link to comment Share on other sites More sharing options...
Adam373 Posted June 17, 2021 Share Posted June 17, 2021 Did you find out what is was? Quote Link to comment Share on other sites More sharing options...
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