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Communities > Diagnostic & Analysis System > MaxiSys > 08 cadillac STS no start after ECU flash
08 cadillac STS no start after ECU flash

3937 Views 7 Replies Latest reply: 2014-11-29 00:52:07


  •   Level 3   
    (79) points
    FloridaTech
    2014-11-20 11:00:16
    Hello-

    New to the Maxisys and new to programming.

    I just put a new transmission & transfer case in a 2008 Cadillac STS 4.  Afterwards there was a error on the display "Starting Disabled - Theft Detect".

    I hooked up my 908pro with j-box using USB cable.  Under programming there was an option for Theft Deterent but if I tried to access it, it would give me an error message.

    After poking around I see there are updates to the ECU so I thought updating it might clear the error.  It did clear the error but now when I try start it the dash goes black except for the little engine light is on.

    I scan the car and 5 faults for ECU a couple for TCM.  Ill post them in a bit.  One is no known key or something, I have tried a couple of key re-learn procedures with no luck.  I have keys 1 and 2 here.

    Thanks - Adam
    Reply

  •   Level 3   
    (79) points
    FloridaTech
    2014-11-20 11:20:30
    6 codes for ECM, 2 for TCM, 7 codes for Instrument Panel Module, 1 HVAC, 1 Remote Control Door Lock Reciever, 1 Veh Direction Alert Alarm Warn Mod, and 2 Electronic Brake Control Module.

    Most of those codes are loss of communication codes.  I can post them if they are useful.  

    Here are the ECM and TCM codes.

    Fault 6 Engine Control Module

    U0121 00
    Lost Communication with Antilock Brake System (ABS) Control Module
    1.Last Test:Failed/Current
    2.This Ignition:Failed
    3.Since Clear:Failed History

    U0140 00
    Lost Communication with Body Control Module (BCM)
    1.Last Test:Failed/Current
    2.This Ignition:Failed
    3.Since Clear:Failed History

    P0575 00
    Cruise Control Switch Signal Circuit
    1.Last Test:Failed/Current
    2.This Ignition:Failed
    3.Since Clear:Failed History

    P0615 00
    Starter Relay Control Circuit
    1.Last Test:Failed/Current
    2.This Ignition:Failed
    3.Since Clear:Failed History

    P0633 00
    Theft Deterrent Key Not Programmed
    1.Last Test:Failed/Current
    2.This Ignition:Failed
    3.Since Clear:Failed History

    U0073 00
    Control Module Communication Bus Off
    1.Last Test:Passed
    2.This Ignition:Failed&Passed MIL Requested
    3.Since Clear:Failed&Passed History


    Fault 2 Transmission Control Module

    U0121 00
    Lost Communication with Anti-Lock Brake System (ABS) Control
    Module
    1.Last Test:Failed/Current
    2.This Ignition:Failed
    3.Since Clear:Failed History

    U0140 00
    Lost Communication with Body Control Module (BCM)
    1.Last Test:Failed/Current
    2.This Ignition:Failed
    3.Since Clear:Failed History

    Hopefully Autel can upgrade the forum so we can upload either PDF or images to these posts.
    Reply

  •   Level 10   
    (7890) points
    ede65

    2014-11-24 20:01:45 (Reply to:FloridaTech)

    -

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  •   Level 10   
    (7890) points
    ede65

    2014-11-24 20:17:56 (Reply to:ede65)

    -

    Reply

  •   Level 3   
    (79) points
    FloridaTech
    2014-11-27 20:12:56 (Reply to:ede65)
    I did not get the issue resolved, although with Autel support they helped me by getting a GM tech on the line (conference call) and he explained it was an issue on the CAN bus somewhere.  One of the modules was not communicating and I needed to find out which one.  Possibly could be the electrical plug on the transmission.  

    I didn't have time to look through it any further though, we just towed it to Cadillac as we need it fixed ASAP.  

    I think I flashed it from autel web.  I do not know the difference though... what is tisweb?

    Reply

  •   Level 10   
    (7890) points
    ede65

    2014-11-28 09:05:03 (Reply to:FloridaTech)

    -

    Reply

  •   Level 3   
    (79) points
    FloridaTech
    2014-11-28 16:57:33
    Got the car back from Cadillac today.  $207 after taxes to fix it.  They reflashed ECM, TCM and BCM.  All of the errors were due to the TCM having a different VIN than the ECM.

    Reply

  •   Level 10   
    (7890) points
    ede65

    2014-11-29 00:52:07 (Reply to:FloridaTech)

    -

    Reply
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