IS F (2008-2014) Discussion topics related to the IS F model

Hesitant, slower and loss of responsiveness lately on ISF

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Old 06-15-18, 07:58 PM
  #46  
lobuxracer
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Originally Posted by henry1229
You are just talking about clearing the learned behavior right? The Lexus dealership did that when I took my car in and it helped quite a bit. The transmission was much quicker to downshift in auto mode.
No, I was talking about a full reset of the TCU to original factory settings. What you got was a "reset memory" followed by a specific drive pattern. When you put in a new transmission, you have to "Set Transmission Compensation Code" which also does a reset memory, but requires inputs from the build sticker on the gearbox. Anyone with access to Techstream can perform this reset, but the drive pattern after resetting memory is very specific so I wouldn't do this without both Techstream and TIS.
Old 06-19-18, 10:01 PM
  #47  
lawrence1
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I was referring to the reset memory which clears the learned shfting parameters. No need to go further unless you're replacing the gearbox. I'm going to do this on my car and report back but iveI been traveling constantly the past few months and haven't had time to get to it. I should be able to get into it come July.
Old 11-17-22, 11:59 AM
  #48  
larryp2023
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Originally Posted by Fredd001
I appreciate the input! Supposedly your not supposed to touch the tranny fluid at all according to what I’ve read but You suggest I still do it anyways? Any guides on how to check and top off the fluid on our tranny’s? I’m looking into that techstream, can anyone do it? Any guides on that? Thanks a lot man I hate asking questions but when it comes to the F I don’t want to mess anything up
Did you ever find out what went wrong with your ISF ? Not alot of ISF owners had this issue and I’m having that same exact issue right now with my 2011 ISF 75,000 miles.
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