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Old 07-19-09, 11:25 PM
stephenray5252 stephenray5252 is offline
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Cadillac(s): 2004 CTS
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Re: CTS anti theft or imobilizer system

Thanks for the input. I tried this on both of the existing keys with no luck. The first time I had left the door open and the security light had not gone out after 12 plus minutes.

However; if I close the door and insert either existing key and switch to on (accessory; I can not get the starter to go) the security light goes out after about 5 seconds. However the car still will not start and as soon as I try the security light comes back on solid.

I will see if I can get a new key in the morning to try. However it seems to me the problem is the sensor unless both keys are dead.

Is there any system to test the keys to see if the transponder is responding?
I am a technical person and have test equipment like spectrum analyzers available.Ii assume the car emits a magnetic field that powers the transponder in the key similar to controlled door entry systems. Basically a RFID system.

Steve
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