Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

Results 1 to 4 of 4

Thread: New PCM flashed and doesn't work

  1. #1
    CAutoC3 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Mar 2008
    Posts
    3

    New PCM flashed and doesn't work

    I just had a new PCM for a 98 STS flashed and when installed it comes up with a security theft prevention message and will not start... was it flashed wrong and can it be re-flashed??? Thank You!


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    ewill3rd is offline Cadillac Technician
    Automobile(s): none
    Join Date
    Nov 2005
    Location
    WOODBRIDGE, VA
    Age
    49
    Posts
    11,051

    Re: New PCM flashed and doesn't work

    No it wasn't flashed wrong, you just need to do the VTD (vehicle theft deterrent) relearn procedure to set the password for the theft system into the new PCM.
    There are a couple of methods, one of them is a "flash" method.
    You'd need a Tech 2 and a Techline PC for that.
    I think someone else might be able to chime in with the manual procedure.

  4. #3
    CAutoC3 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Mar 2008
    Posts
    3

    Re: New PCM flashed and doesn't work

    I found this... does this look like the correct procedure?

    Security Relearn for Vehicle Theft Deterrent
    Thursday, 24 January 2008
    Security Relearn Procedure Steps for Vehicles with Vehicle Theft Deterrent (VTD)

    1. Attempt to start the car by turning the key to the Start/Run Position.
    2. Observe that the vehicle fails to start and that the security light is illuminated.
    3. Release key to the 'On/Accessory' Position. (Do NOT turn the key to the 'off' position.)
    4. Allow the vehicle to sit in the 'On/Accessory' Position for NO LESS then 15 minutes.
    5. Turn key to off position and allow the vehicle to remain in the 'OFF' position for NO LESS then 30 seconds.
    6. Repeat #1 through #5 for 3 cycles.
    7. On 4th attempt, car should start.

    Properly executed, this procedure should take approximately 45 minutes to complete.

  5. #4
    CAutoC3 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Mar 2008
    Posts
    3

    Re: New PCM flashed and doesn't work

    Quote Originally Posted by ewill3rd View Post
    No it wasn't flashed wrong, you just need to do the VTD (vehicle theft deterrent) relearn procedure to set the password for the theft system into the new PCM.
    There are a couple of methods, one of them is a "flash" method.
    You'd need a Tech 2 and a Techline PC for that.
    I think someone else might be able to chime in with the manual procedure.
    Thank You your information was a huge help!


Bookmarks

Cadillac Posting Rules

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Read about Lincoln | Buick | Kia Forte Forum