Question about 1999 Cadillac DeVille

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Starting diabled remove key. i tried disconnectiong the battery, it did not work

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  • r_shubnell Jul 11, 2010

    starting disabled remove key. tried diconnecting the battery. it did not work. reprogramed the key it started but turned if off and it did not restart

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  • Master
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Try this
PASSKEY LOCKOUT RESET :----
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.
You have been locked out by the pass lock system and it needs to relearn the security system. Here's how to do it without a scan tool. It takes 3o minutes and patience to do it right.
30 Minute Learn Procedure
 
Tools Required: None
Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON (vehicle will not start).
Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1 through 4, 2 more times for a total of 3 cycles/30 minutes. The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK. IMPORTANT: The vehicle learns the Passlock Sensor Data Code and/or password XX the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password.
With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.
If still the same problem then , the problem is most likely the receiver for the key transponder, the dealer can test this system with a special electronic test tool called tech 2 scanner.
Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Posted on Jul 11, 2010

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  • Cadillac Master
  • 6,826 Answers

Turn the key on,leave it on for ten minutes,then turn it off,and right back on,leave it ten more minutes,and turn it off,and right back on,and one more time,a total of three times,and thirty minutes,this will relearn the key to the ignition.

Posted on Jul 11, 2010

  • r_shubnell Jul 11, 2010

    after doing what you said it started but i let it run for a minute then turned it off and now it is saying the same thing and it is not starting

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jul 11, 2010

    You will most likely have to replace the ignition ,lock and cylinder,but try the relearning procedure again,this time allow it to run a while,maybe drive it,but do not turn it off,until you get back.

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