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The mkiv Supra Owners Club

Speedo conversion


kevin smith

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So does the signal go from the gearbox, to the ecu, then on to the speedo?

 

I was curious if my syvecs could act as a speed converter, but I've been told not.

On JSpecs, the signal goes from gearbox, to speedo, then on to odometer, then onto the ECU. The ECU is at the end of the chain. I don't know about UK specs, but I'd be really surprised if they worked differently.

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I don't know of anyone in your patch, you need input from a local yokel?

 

It's not rocket science, look behind the odo and speedo, or sometimes adjacent to ECU and you'll find an after market gizmo. Some folks are too lazy to solder the joints which leads to problems such as yours. If that's the problem solder them up. If that doesn't fix it, remove the gizmo and rejoin wires as when stock and have a working transmission with a kph readout until you can find a replacement speed converter.

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Thanks David P whilst is was looking for the ECU as i thought it was behind the dash ? now know where it is LOL, anyway i must of disturbed something behind the dash (ie wiring) because the problems have stopped, so i am going to take your advise and going back in behind the dash and sort the problem and try and locate a uk spec speedo.

Many thanks for your advice (what a great club this is)

Thanks Kevin.

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