Question about 2003 Cadillac CTS

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MY CTS IGNITION WONT TURN BACK AND IT STATES THAT IS IN LOCKED MODE ON THE DASH. DOES ANYONE HAVE AN IDEA OF WHAT IT COULD BE ?

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  • Juan Valencia
    Juan Valencia Feb 26, 2009

    Hi there thanks for the input.I figuered it out. I pulled the ecu fuse out and it released the lock, howerver the problem was still there. I locked my car completely and then put the fuse back in. Unlocked it and it worked. I think we are putting these dealerships out of bussiness.

  • Juan Valencia
    Juan Valencia Feb 26, 2009

    I am sorry about that. I din't realize that I had rated it that way, however thank you for the information.

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  • Cadillac Master
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This is a Pass Key anti theft problem, do the following to reset the system, if this doesn't work u will have to take it to the dealer, they are the only ones with the test gear to find and fix the problem

PASS LOCK RESET GM CARS 1999 UP
1) Put the key in the ignition and turn to the "ON" position. Leave it that way for 10 minutes. After 10 minutes turn the key and take it out. Repeat this process (2) more times (3 times, 30 minutes total) This should reset the passlock system to recognize your key.

Posted on Feb 25, 2009

  • yadayada
    yadayada Feb 26, 2009

    I was wondering why u rated me thanks for trying, I gave u good solid info based on what most often causes this problem and fixes it..

  • yadayada
    yadayada Feb 26, 2009

    U can change the rating, would u do that please?

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Posted on Jan 02, 2017

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What is reason my 2005 Cadillac deville will not start-will not crank


Given the amount of electronics on your vehicle , control modules (computers ) serial data communication networks etc.... Me or anyone else on would only be guessing as to what the problem is . Starting with the basics to find a cause is always the best ! Checking for diagnostic trouble codes should always be the first step !
Reading how the systems work is always a good idea too . Especially for someone who has no idea how this vehicle works .

When you turn the key in the ignition low voltage inputs are sent to the module incharge the PMM - power mode master ! In you vehicles case it's the (DIM) dash integration module !
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On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the dash integration module (DIM). The PMM receives 4 signals from the ignition switch.
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