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The mkiv Supra Owners Club

Overdrive


Dave

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Been out in the supra today 50 miles each way ran perfect on the way down but on the way back the overdrive wouldn't kick in played with the button but still not working ,dropped to 50 for a camera zone and it kicked in ,and was alright after that,anyone got a clue ,sensor or something ?..

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  • 3 weeks later...
I would check the auto box oil level, correctly, engine running in Park, first.

 

Thanks Chris will check the levels tonite ,I've just swapped the TPS ,and it's running a little high on tickover ,would that make a difference ? Haven't set it properly will have to do that also .

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The TPS setting is critical to many aspects of the engine and gear box control strategies. I hope you haven't twiddled any throttle stop screws as well??? :( :( You MUST reset the TPS sensor STRICTLY following the workshop manual. if you've twiddled throttle stop screws without a reference to return precisely to, you are in a pickle...

 

The TPS being set wrong can and will affect the auto box control...

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The TPS setting is critical to many aspects of the engine and gear box control strategies. I hope you haven't twiddled any throttle stop screws as well??? :( :( You MUST reset the TPS sensor STRICTLY following the workshop manual. if you've twiddled throttle stop screws without a reference to return precisely to, you are in a pickle...

 

The TPS being set wrong can and will affect the auto box control...

 

Ok set the TPS and revs are now steady at 650-700,put the original back on which I marked up before I took it off ,haven't touched the throttle stop screws, I read it's a no no .just got to take out for a test .

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