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Home >> Cadillac >> 2000 >> Escalade >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Anti-Theft System) >> Programming >> Passlock(tm) SYSTEM >> Auto Learn
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Auto Learn

WARNING: This page is about a different car, the 1999 GMC Sierra and 1999 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: This procedure allows relearning of Passlock(tm) module or PCM/VCM learned data code after replacement of Passlock(tm) module, Passlock(tm) sensor or PCM/VCM. DTC B3031 will set when entering programming mode.
  1. Clear all DTCs. See scan tool manufacturer's instructions. Turn ignition off. Replace component(s) as necessary.
  2. With transmission in Park (A/T) or Neutral (M/T), turn ignition switch momentarily to START position (DO NOT start engine). Leave ignition in RUN position (engine off). If Passlock(tm) sensor was replaced, SECURITY indicator light will flash for 10 minutes. If Passlock(tm) module was replaced, SECURITY indicator light will flash for a few seconds, then stay on for 10 minutes. If PCM/VCM was replaced with a new PCM/VCM, vehicle may start and procedure may not be needed. If replacement PCM/VCM was used even momentarily, SECURITY indicator light will flash for a few seconds, then stay on for 10 minutes. After 10 minutes, when light turns off, turn ignition switch to OFF position for 10 seconds.
  3. Repeat step  2 twice more. Auto learn procedure will be completed during next start attempt. Clear all DTCs. If PCM/VCM was replaced, reprogram PCM/VCM. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
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