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Home >> Buick >> 2003 >> Century Custom >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 3.1L Engine >> Programming >> Programming Theft Deterrent System Components >> 30 Minute Learn Procedure
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30 Minute Learn Procedure

  1. Turn ignition switch to RUN position, engine OFF.
  2. Attempt to start the engine, then release the key to RUN position (vehicle will not start).
  3. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
  4. Turn ignition switch to OFF position, and wait 5 seconds.
  5. Repeat steps  1- 4 two more times for a total of 3 cycles/30 minutes (the vehicle is now ready to relearn the password on the next ignition switch transition from OFF to CRANK position).
    6. NOTE: The vehicle learns the password on the next ignition switch transition from OFF to CRANK. You must turn the ignition switch to OFF position before attempting to start the vehicle.
  6. Start the engine (the vehicle has now learned the password).
  7. Using a scan tool, clear any DTCs if needed (history DTCs will self clear after 100 ignition cycles).
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