CVT transmission fast learn

Matthew Owner/Technician Oregon Posted   Latest  
Tech Tip
Programming
2018 Chevrolet Spark LS 1.4L (A LV7) (CVT7) — KL8CB6SA2JC467638
P1790

New HP laptop, Windows 10 Pro, Cardaq 3 Plus, Subscription to SPS2. No previous issues with GM programming. 

I got called today to program the TCM and fast learn on this 2018 Spark. Programming went ok, but when I went to do the fast learn it failed the firs time. I double checked codes and fast learn protocol and tried again. Failure again. There's a sequence for finishing. Wheels forward, shift into park. Key off. Open and close driver's door. Wait 3 minutes. After 2 hours and many many attempts I looked in my Autel for fast learn option and none was available. Tried the Snapon on Solus Edge and there was a fast learn option there. Tried that and everything went through in 2 minutes.

I'm not sure if this is a SPS2 issue or something else, but I know the p1790 won't clear until the fast learn has been done. If you can't get the SPS2 to do it, Snap on came through today.

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Ali Diagnostician
Texas
Ali
 

Had the same case with 2018 chevy camaro. Only difference I used verus pro and all went well.

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Kerry Mobile Technician
Ohio
Kerry
   

Matthew, I feel your pain…. in my experience, to get rid of the P1790, perform the adaptive pressure reset first with GDS2 (different from the fast learn). It's more of a scanner function than a SPS2 function, which is why the snap-on came through and most scan tools will do this also. This procedure is more of an initialization between the TCM and the internal ROM in the Jatco CVT. Even though…

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Anthony Owner
New York
Anthony
 

similar situation with a GMC Sierra Diesel. 12 Different Emission Resets. Autel can do all but 1 and service message kept popping up on dash. Snap-On Solus was able to reset. I call this Scanner Roulette. Plug in and rotate scanners till one works!

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Funny
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Matthew Owner/Technician
Oregon
Matthew
 

Scanner Roulette is appropriate!

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Timothy Owner/Technician
Wisconsin
Timothy
 

No roulette necessary with the OEM tooling. But, that is true: the fast learn is a scantool function, not a programming issue.

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Anthony Owner
New York
Anthony
 

yea been saying that for years. OEM GM, Ford, Mopar (they get bought and sold every decade or so), Toyota, BMW, etc etc etc and dedicated lap tops for each carline? what are you thinking 50K 75K 100K in diag equipment. I have a Zues, Verus Pro, Autel, Solus, Tech ii (barely fires up). And am always playing scanner roulette.

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Timothy Owner/Technician
Wisconsin
Timothy
 

Well, you don't need to have a laptop for each carline, simply run a partitioned drive, and load all you want on one laptop, or just a few laptops, but the subs get pretty heavy, the more ‘separate’ PCs/laptops you want to use. I have OEM for the domestics. Chrysler is the most expensive scan tool/flashing-wise. To cover all of the Chryco lineup, you need a DRB3 with the Mitsu card, the…

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