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The mkiv Supra Owners Club

MANU and O/D lights flashing after removing the TRAC fuse


fastnfurious

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is this normal? i read articles about O/D light flashing after removing the TRAC fuse but not the MANU light, which is kinda weird really... any advise? thanks!

 

btw, i've not been driving the car for almost 8 months now. only warming it up every alternate days for 15-30mins (with aircond and ICE running) to keep the electrical and mechanical parts moving.

Edited by fastnfurious (see edit history)
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Plagiarised, as time is short (pub day, today :))

 

It's true, 80 to 90 percent of your engine's life is consumed by cold and dry start ups. Engines usually shut down hot, at which point the oil is thin and drips away from the bearing and other "friction intense" areas. Gradually the oil cools, thickens and becomes difficult to pump. When starting an engine, the lubrication process involves filling all oil galleys, filling the filter, pressurizing the rod, main and cam bearing as well as the entire valve train (filling the lifters and lubricating the cam lobe and rocker arms). Unfortunately, your engine is running while this lubricating process and is meshing metal against metal, hence massive engine wear takes place.

Studies have been done by the Society of Automotive Engineers concerning engine wear and engine failures due to the lack of oil and oil pressure during cold start. (S.A.E. Technical Papers # 780370, 3790729, #790751, #821204, #821206 and #821247). From these, and other S.A.E. studies, it has been determined that up to 80% of entire engine wear occurs during cold start ups. A recent test by McDonnel Douglas of Long Beach indicated that up to 90% of all engine wear takes place during the "oil starvation' period of the cold start (New York Times Syndicated Release 5-6-85).

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oh... never done any speedo converter installation before neither throttle pots setup, only removed the TRAC fuse as shown in this forum to bypass the clumsy TRAC function (was informed the TRC light will stay on and O/D light will be flashing - this is normal but not the MANU light which shouldn't be flashing)

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What I think chris is trying to say is warm your oil before you start the car. Just like the f1 boys do. :p

 

I don't follow this chris. Everyone starts the car from cold. It's unavoidable.

 

I must have got the wrong end of the stick.

 

 

For what it's worth on the trac/Manu issue. My uk spec has done this since I got it. Sometimes trc is on and Manu flashing. Other time they are both off. Sometimes it doesn't happen for ages then all of a sudden it happens all the time. Sometimes I can switch the car off and start it again and it's gone. Or the reverse. Sometimes it takes 3/4 times doing this before it goes. Sometimes it just doesn't go.

Car drives the same. Manu mode just doesn't operate. Doesn't stop you selecting the gears manually tho. I can't remember if trac control works or not.

 

Iv mentioned this to 3 separate garages (supra specalists) and none of them managed to fix it or have a clue what it could be.

Mine is a uk spec so doesn't have a speed converter. So it's not that.

Edited by Guigsy (see edit history)
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  • 3 months later...

what i did today...

put back the TRAC fuse and the O/D flashing light and TRC light are back to normal now. however, the MANU light is on now and when shifting into R, N, D, 2 or L - both 2 and L lights stay on! what could be the problem now? also notice some kinda air/vacuum noise coming from the undercarriage after putting back the TRAC fuse and when i put the gear into D. is this normal?

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many in the forum have removed the TRAC fuse to remove the speed limiter and disable the annoying traction control but in exchange, this will cause the O/D light to flash and TRC light to stay on all the time.

 

To remove the speed limiter fit the proper piece of kit to do it. When you pull the trac fuse i'm almost sure you stop the autobox from pulling timing during gearchanges to protect itself. I seem to remember some people on supraforums doing this to get harder/quicker shifts and whatnot and ending up with gearbox issues, was years ago when i read it mind.

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