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The mkiv Supra Owners Club

Flashing Overdrive Light


bens747

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My overdrive light flashes periodically. Sometimes not at all and then it will have a constant on off flashing. Turn the engine off and it will reset. I saw in a previous thread that it might be the kph-mph converter chip. For what relevance this has to the flashing overdrive light I don't know. But the poster said it sorted the problem. Question .... Anyone had any experience of this problem and where the hell is the kph-mph converter chip. Thanks guys......

 

:) :sos:

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The convertor is usually installed behind the clocks as it intercepts the signal from the speed sensor before it gets to the speedo, from there it goes to the odo and then to the ECU.

 

If your speedo is working fine and your odo is clocking up fine, then it could be that the connection wire to the ECU that isn't right.

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I need to delimit the 112mph top speed. Would it not be better to replace the kph-mph converter with a new kph-mph + delimiter unit from Thor Racing and see if that cures the problem ... Thankx guys .... :)

 

That would be my line of attack

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That would be my line of attack

 

Thanx Ian .... I think that would be better idea to attack it all at the same time. If the O/D light still flashes at least I can break the sound barrier at 113 lmao.

 

Nice Supe by the way mate :thumbs::thumbs:

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  • 2 weeks later...

My o/d light is flashing.. and I get nothing on the speedo. Anyway of checking a speed converter chip... I have contacted THOR, but they take for ever to get back to you.... busy people you know.

Is it possible the speed sensor on the transmission is gone??? anyone know where it is, as I have the car up on racks now, lookin for the damn thing.

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  • 2 weeks later...

MINE DID THIS FOR ABOUT A WEEK BOUT A MONTH AGO BUT HASNT DONE IT SINCE (SOZ caps lock was on) when i first got my beast i thought it was limited so bought chip of e-bay so might change it anyways when i fit crome dails but is a ebay one gunna be anygood?? other thing was when i checked me sat nav top speed it said 198MPH whoo whoo 94 n/a unmoded who needs BPU and turbos

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overheating transmission.. I have fine oil coming from it... But the oil level is fine.The Thor chip is verified... Where is the Speed sensor on the transmission. Cant find it. Is it almost half way down the car. Cant drive with no speedo! too many cameras near here.

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