LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

how to reset memory

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Old 12-01-03, 01:17 AM
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Lexs400
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Default how to reset memory

I wanted to know if there's a way to erase the memory for the transmission on the 93LS.
I've read that the car has electronic memory in the transmission to keep track of when to shift. Looks like the previous owner drove it mildly and now the gears shift too early without going on 3 plus rpm. I wanted to erase the memory and make it learn my driving style.
any suggestions ?
thanks
Old 12-01-03, 02:00 PM
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persian451
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you need to pull the ECU fuse out and put it back in, the box is above the battery.. I think its EC1
Old 12-01-03, 08:00 PM
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would disconnecting the battery have the same effect ?
if so how long do I need to keep the battery disconnected for ? If this won't work then I'll pull the fuse out. But is there any specific way of doing so ? keeping the car OFF while doing so and for how long will the fuse need to be out of the socket ? How would I know that the reset has worked ?
thanks.
Old 12-01-03, 08:30 PM
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1 minute should do it, the systems should revert to original programming. I dunno about the radio and seat memories though.
Old 12-01-03, 08:41 PM
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persian451
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Originally posted by Lexs400
would disconnecting the battery have the same effect ?
if so how long do I need to keep the battery disconnected for ? If this won't work then I'll pull the fuse out. But is there any specific way of doing so ? keeping the car OFF while doing so and for how long will the fuse need to be out of the socket ? How would I know that the reset has worked ?
thanks.
pull out the fuse for a second or whatever and put it back in... trust me.. it dumps the memory, how will you know? you car will drive different. or if you had a check engine light, the light turns off on the inital start up of the car.. its the fuse for the computer. you could try pullign the fuse for the power steering and see if cuts the power steering.. see what i'm tryin to get at? just take it out and stick it back in.. or you could do the good ol battery pull.
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