Results 1 to 7 of 7

Thread: Can't read stock tune out of LLY ECM

  1. #1
    Lifetime Member
    Join Date
    Feb 2007
    Posts
    514

    Default Can't read stock tune out of LLY ECM

    Every time I try to read the tune out of the truck, I get an error message that says "EFILive Interface not detected. Cannot communicate with Flashscan or Autocal." or something to that effect. The scan tool connects and displays data just fine, and it will read the tune out of my LBZ with no problems. Anyone have any ideas?

  2. #2
    Lifetime Member minytrker's Avatar
    Join Date
    Jan 2006
    Posts
    1,309

    Default

    Do you have after market radio or alarm? I have had to pull the fuse for the radio on a couple LLY's with aftermarket radio's.
    99 Z28 Camaro|LS1 Heads & cam Tuned by LSX Power Tuning
    2003 CC Duramax Dually|19.5 w/245/70/19.5|Tuned by LSX Power Tuning|5in exhaust
    2009 G8 GT Vararam CAI|Tuned by LSX Power Tuning|GXP Mufflers|Custom System
    2006 CTS-V K&N CAI|OBX Headers|Cammed LS3|Tuned by LSX Power Tuning|

  3. #3
    Lifetime Member
    Join Date
    Feb 2007
    Posts
    514

    Default

    Stock radio, no aftermarket alarm. The only non-factory stuff is flexalite electric fans and a Suncoast 6 speed conversion.

  4. #4
    Lifetime Member
    Join Date
    Feb 2007
    Posts
    514

    Default

    Anyone? I could really use some ideas/suggestions here.

  5. #5
    Lifetime Member GMC-2002-Dmax's Avatar
    Join Date
    Dec 2005
    Posts
    1,261

    Default

    LLY's can be difficult, close all doors, shut the dome light off, shut down the radio, HVAC, etc. have the cable to the truck OBD port-Flashscan-computer before you key it on.

    Key it on and wait 20 seconds for all the modules to boot up and the dinging to stop.

    I flashed one yesterday in the truck and when I went to read the file out it said the ecm was locked.

    I had to key the truck off for/on 5 times before it said it wasn't locked.

    I normally bench flash all ecms and they are never a problem on the bench, some trucks are funny about flashing in the truck.

    I would suspect low voltage in the trucks batteries ????
    www.ridgerunnerdieselperformance.com

    EMAIL ME

    Tuner of many, many Duramax and Cummins Diesels.


  6. #6
    Lifetime Member
    Join Date
    Feb 2007
    Posts
    514

    Default

    Thanks Tony. I'll give all that a try and hook up a battery charger.

  7. #7
    Lifetime Member
    Join Date
    Feb 2007
    Posts
    514

    Default

    Well, I did a little digging and found that the truck does have an aftermarket alarm on it even though it doesn't use an aftermarket key fob. Once I disconnected all the wires they tapped into the ignition switch to power it up, I was able to read the tune out. Thanks for the suggestions from both of you guys.

Similar Threads

  1. Lly Ecm
    By Cougar281 in forum Duramax LLY
    Replies: 2
    Last Post: July 24th, 2007, 10:12 AM
  2. Stock LLY file?
    By Wasted Income in forum Duramax LLY
    Replies: 12
    Last Post: December 25th, 2005, 03:27 PM

Posting Permissions

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