Results 1 to 5 of 5

Thread: DVT : Fault active CASE learn question

  1. #1
    Junior Member
    Join Date
    Dec 2016
    Posts
    12

    Default DVT : Fault active CASE learn question

    Hello,
    I'm working on an E38/T43 twin turbo Corvette drivetrain transplant into a Fisker. Mafless so I have the MAF high fail at 0hz(should the maf low be set at 0 too). It starts and runs good now after some tuning but I need to do a case learn since that code is set. The brake switch goes inactive/active(btw, which way is it supposed to say when brake pedal in pressed? I don't have another E38 vehicle here to check to make sure the brake switch is wired correctly) I open up the T43 with the flashscan and it says it is in Park. Also had the temp up to about 85C. Anyway, It just errors and says "Fault active" The only codes are the P0102 MAF low and of the course the case learn P0315. Is the P0102 causing it to say fault active? If so how do I go about doing a CASE learn with no MAF? I've tried everything I can think of and this is my first Mafless VVE project.
    I could sure use some guidance.
    Thanks,
    -Carl
    P.S. Another weird thing going on is the fans turn on as soon as you turn the key on(Set to discrete for the way the fan relays are wired). DVT turns them on and off fine so I would think all the circuitry is fine.
    BTW this is all based on an '09 Vette E38.
    Last edited by In-Tech; June 20th, 2019 at 07:17 PM.

  2. #2
    Lifetime Member
    Join Date
    Mar 2006
    Posts
    4,792

    Default

    You can't setup all of the necessary parameters in EFILive to enable efans on a Gen IV+ controller. If the vehicle did not come originally with efans, you'll need to obtain a patched file with the necessary parameters changed to support efans. I assume the 09 Vette had efans, but not sure on how they were setup from the factory.

    For the CASE, do you have an ebrake signal going to the TCM? Both parking brake and normal brake have to be applied for the ECM to go into the relearn mode.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  3. #3
    Junior Member
    Join Date
    Dec 2016
    Posts
    12

    Default

    Hello, thanks for the reply. I did not build this car, I am just tuning it. Thanks for the tip on the E-Brake.

    I think this is an E38a. I did a 2010+ E38 recently for a '67 chevelle using a 2016 cal and set the fans to discrete and all worked fine but I could be missing something so I'll have a look back again and see if I spot anything. I've barely started on this project and hope to be on the chassis dyno in the next couple days.

    Thanks again and I will post what I find,
    -Carl

  4. #4
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    27,747

    Default

    Brake switch active = brake applied

  5. #5
    Junior Member
    Join Date
    Dec 2016
    Posts
    12

    Default

    Hello, sorry for the long delay on the follow-up. I transplanted all of the efan stuff from a 2009 discrete truck file and the fans work perfectly. I never did get the CASE learn working but I will work on that further when the car comes back after all of this Fisker cars' internal wiring stuff is fixed. Besides all of the transplant wiring, the shop is trying to wire it so the tap shift works. It ran well on the dyno for a stock engine with small turbo's...from memory it was ~650 wheel on a mustang. There is still much more to do after the car is completed. Long projects like these, sometimes, the owner just needs to go boil the tires for a weekend or so, lol.

Similar Threads

  1. DVT FAULT when trying to CASE RELEARN
    By Naf in forum E37, E38 & E67 PFI ECM's
    Replies: 2
    Last Post: March 9th, 2017, 11:28 AM
  2. How does a CASE re-learn work?
    By johnmaster in forum Gen III V8 Specific
    Replies: 5
    Last Post: July 17th, 2011, 04:01 PM
  3. CASE Learn
    By nathans1987 in forum Gen III V8 Specific
    Replies: 7
    Last Post: September 29th, 2010, 11:20 AM
  4. Where is CASE learn stored?
    By N0DIH in forum RoadRunner Real-Time PCM Emulator
    Replies: 0
    Last Post: October 17th, 2009, 04:06 AM
  5. CASE Learn on a RR?
    By N0DIH in forum RoadRunner Real-Time PCM Emulator
    Replies: 39
    Last Post: August 1st, 2009, 01:37 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •