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Thread: Do not attempt scanner crank relearn!!!!

  1. #1
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    Do not attempt scanner crank relearn!!!!

    The function does not work fully. I followed the steps that scanner prompts and it said the function was completed. Now I'm stuck with a p0315 hardcode that will not clear. I repeat: DO NOT ATTEMPT CRANK RELEARN!!! Even after performing the test drive as outlined both by the ford workshop manual and as outlined below here. p0315 remains. I went in and set it to "MIL Light" so at least I can clear it every time it comes back. The way I have it set now, it's only a matter of time before the light pops back on, but at least now I can clear it. The code now shows as "pending" instead of permanent.

    http://www.svtperformance.com/forums...!-what-is-this

    This is where I read about the test drive relearn. The code did not exist prior to me attempting the crank relearn through scanner.

    My guess: the function isn't complete within scanner even though HP Tuners claims it is. Now it looks like I'm off to the dealer where there are a bunch of clowns that barely know how the WDS works.
    "I didn't fail, I just found 100 ways to do it wrong." - Benjamin Franklin

  2. #2
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    I thought crank relearn only required you to turn engine on and rev up to a certain RPM and WHAMOO you are done

  3. #3
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    Yes this is true. And the function says it's complete...but the side effect...p0315...crank position not learned...not the exact terminology but close. Lemme tell ya revving a car to 5k with fender exit exhaust gets a little obnoxious just after once or twice.

  4. #4
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    Tried the function again today and it shot an error on scanner and shut it down...so obviously there is something wrong with this function.

  5. #5
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    Typically the only time you'd need to do a crank relearn is when you are throwing a P0315 code, its not a "side effect".

    Additionally I wasn't even aware it was active for fords, I thought it was only active for GM's.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  6. #6
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    Quote Originally Posted by Bill@HPTuners View Post
    Typically the only time you'd need to do a crank relearn is when you are throwing a P0315 code, its not a "side effect".

    Additionally I wasn't even aware it was active for fords, I thought it was only active for GM's.
    It was activated in one of the previous updates. There was a thread on it too

    http://www.hptuners.com/forum/showth...CM-Scanner-3-2

  7. #7
    HPT Employee Eric@HPTuners's Avatar
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    There is no issue with the Crank Relearn Bi-Di controls in VCM Scanner.
    Eric Brooks
    HP Tuners, LLC

  8. #8
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    Oh...there's not? So this is just a figment of my imagination? The code just came on at the same time as I attempted it...yeah sure.
    "I didn't fail, I just found 100 ways to do it wrong." - Benjamin Franklin

  9. #9
    HPT Employee Eric@HPTuners's Avatar
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    Others including my self have used this function with zero issues. I am not saying you don't have an issue, but I think you are jumping the gun a bit as to the cause.
    Eric Brooks
    HP Tuners, LLC

  10. #10
    used this function about 3 hours ago and zero problems here.

  11. #11
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    Jumping the gun to the cause? No problems no cel. Drive car for 4 weeks after cam sensor replacement. Still no problems. Decided FOR REALLY NO REASON to test the crank relearn. Now has crank variation p0315 hard code. Yup seems like a completely illogical conclusion to draw that the crank relearn function doesn't fully work. It is widely known that there are pids missing from some strategies so in my mind it's not far fetched to say that this function also does not work on all strategies as well. So instead of saying "if you feel lucky try it" I decided to say don't do it in hopes that hpt would say ya know what maybe this needs some more exploration and maybe there are some strategies that this is not working on...as is the case with ipw among other pids. So now that the box is open a lil instead of saying well it works on my car...let's stop and think about the various strategy method that ford uses and the fact that some just "work" better than others when it comes to certain things. I fully think this is another case where the multiple strategy thing is biting HPT in the ass. As is the case with missing pids with some and not others. Instead of saying yeah not sure we'll look into it until further testing can be done we suggest not doing this...I feel as though I'm being blamed or the suggestion of something is broken is taking place. Followed the prompts as they appeared...went from no cel to cel over the course of the relearn...instantly as soon as the PC said function complete the cel came on and would not clear.

  12. #12
    Advanced Tuner Sébast19X's Avatar
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    I have some kind of weird stuff too on my 2010 e38 ecm. Very hard and I almost unable to do the clutch in pedal learn, and as soon as I get it done, after almost 100 try, i got a p0315. Try the 2.24 and 3.2.xx about 100 time. Each time I'll restart the engine, i got the p0315 active. ......

    Best of luck sir,
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    PCM Tuned, LG super RAM, AR Headers, Hoosier DR2 295-55-15, MSD Atomic air force intake, Iceman 7.0 cam

    Best N/A E.T. : 8.836
    Best N/A Mp/h : 159.75
    DA for this pass: 0'

  13. #13
    HPT Employee Eric@HPTuners's Avatar
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    Quote Originally Posted by schaid View Post
    Jumping the gun to the cause? No problems no cel. Drive car for 4 weeks after cam sensor replacement. Still no problems. Decided FOR REALLY NO REASON to test the crank relearn. Now has crank variation p0315 hard code. Yup seems like a completely illogical conclusion to draw that the crank relearn function doesn't fully work. It is widely known that there are pids missing from some strategies so in my mind it's not far fetched to say that this function also does not work on all strategies as well. So instead of saying "if you feel lucky try it" I decided to say don't do it in hopes that hpt would say ya know what maybe this needs some more exploration and maybe there are some strategies that this is not working on...as is the case with ipw among other pids. So now that the box is open a lil instead of saying well it works on my car...let's stop and think about the various strategy method that ford uses and the fact that some just "work" better than others when it comes to certain things. I fully think this is another case where the multiple strategy thing is biting HPT in the ass. As is the case with missing pids with some and not others. Instead of saying yeah not sure we'll look into it until further testing can be done we suggest not doing this...I feel as though I'm being blamed or the suggestion of something is broken is taking place. Followed the prompts as they appeared...went from no cel to cel over the course of the relearn...instantly as soon as the PC said function complete the cel came on and would not clear.
    IPW being missing from some strategies is not some error. It just hasn't been added. I have added it by request until I find the time to go through several hundred definitions and add it to each and every one.

    The function for the crank relearn is the exact same on all the late model Ford PCMs , and has been tested and works as intended. You would probably be in the same boat had you used the IDS to do the relearn, the functionality is identical.
    Eric Brooks
    HP Tuners, LLC

  14. #14
    Senior Tuner mbray01's Avatar
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    IT is my understanding that the crank relearn is not done by the scannner, but done within the ecm. The scanner is simply the carrier of the message to the pcm that it has been requested. Following what eric has said, it would have happened with ids. My suspicion is the code p0315 never existed, because it never met the conditions to run the code, when you did the crank relearn, it then saw an issue, and subsequently set the code. You forced it to look at the difference, and now it sees it. My guess is either that new sensor is faulty, or you have an issue withing the vehicle, either electrical or mechanical
    Michael Bray
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  15. #15
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    I have had the same issuse when trying to do a crank relearn.

    But I found if you load your stock tune your able to do the reset. then reload your custom tune and clear code.

    You need to get vehicle to operating temp. then flash stock tune, do crank relearn and then reflash custom tune and clear code.
    If your car is like mine its unhappy on stock tune with id1000 and e85. But it only needs to run a short time for the crank relearn.

    I heard its caused by nonstock rev limiter. But have not confirmed.


    .
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  16. #16
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    I think you've got the answer to that P0315 error as I was able to clear that by doing a few steps but forgot to take log and running into the same issues again! I will try your steps and hope it clears that annoying code as it will also disable your auto start from your FAB key too!
    Quote Originally Posted by 2qwk4ya View Post
    I have had the same issues when trying to do a crank relearn.

    But I found if you load your stock tune your able to do the reset. then reload your custom tune and clear code.

    You need to get vehicle to operating temp. then flash stock tune, do crank relearn and then reflash custom tune and clear code.
    If your car is like mine its unhappy on stock tune with id1000 and e85. But it only needs to run a short time for the crank relearn.

    I heard its caused by nonstock rev limiter. But have not confirmed.


    .

  17. #17
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    Got another question for you! My SCT X4 tuner it warns you that if you have present DCT errors you cannot perform the crank relearn process so if you cannot clear the P0315 error how could you do the crank relearn process without clearing the code?

  18. #18
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    It should let you clear the code for a few seconds to attempt the reset, but I've also been told that you have to be using stock rev limits for this to work - sct devices even state to return to stock settings before attempting this...
    2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
    2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80

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  19. #19
    So has this been fixed? Or has it been working properly. Planning on doing this soon just want to make sure all is good.

  20. #20
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    Quote Originally Posted by Blueprint View Post
    So has this been fixed? Or has it been working properly. Planning on doing this soon just want to make sure all is good.
    I did a crank relearn after a clutch install with out issues...OP seems to be the only one who's had a problem...

    http://www.hptuners.com/forum/showth...-to-Video-quot