Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
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This usually indicates the security system has engaged and does not recognize the key programming any more.Try this relearn below with a fully charged battery and this should correct the issue here.If this does not work then a dealer will have to check and update the programming in the computer to correct this fault.
30 Minute Learn Procedure 1. Turn ON the ignition, with the engine OFF. 2. Attempt to start the engine, then release the key to ON; the vehicle will not start. 3. Observe the SECURITY telltale; after approximately 10 minutes the telltale will turn OFF. 4. Turn OFF the ignition, and wait 5 seconds. 5. Repeat steps 1 through 4 two 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. 6. Start the engine.
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