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Home >> Mercury >> 2005 >> Sable Platinum Edition >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Anti-Theft System - Pats >> General Procedures >> Key Programming - Unlimited Key Mode >> Disabling Unlimited Key Mode

Disabling Unlimited Key Mode

NOTE: By disabling the unlimited key mode with a random 8-digit number the previous access code will no longer operate the vehicle.
  1. Using a diagnostic tool, select PCM from the menu. Follow SECURITY ACCESS to obtain security access. For additional information, refer to ANTI-THEFT SECURITY ACCESS .
  2. Select: DISABLE UNLIMITED KEY MODE.
  3. Select: PROGRAM UNLIMITED TRANSPONDER SECURITY KEY.
  4. Enter an 8 digit random number (not 00000000 or 00000001).
  5. Select: IGNITION KEY CODE ERASE.
  6. Disconnect the diagnostic tool and turn the ignition key to OFF.
  7. Program two keys to enable vehicle.
  8. Program any additional keys using either KEY PROGRAMMING USING TWO PROGRAMMED KEYS  or KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT .