Disabling Unlimited Key Mode

2001 Mercury Sable LS, 4D Sedan, 3.0 U, AX4SSECTION Disabling Unlimited Key Mode
  1. Turn ignition switch to LOCK position. Connect Worldwide Diagnostic System (WDS) tester or New Generation Star (NGS) tester to Data Link Connector (DLC). See Fig 1. Turn ignition switch to RUN position. Using WDS or NGS perform security access procedure. See SECURITY ACCESS PROCEDURE .
  2. After security access procedure is been performed, select DISABLE UNLIMITED KEY MODE and than select IGNITION KEY CODE ERASE. Turn ignition key to LOCK position and disconnect WDS or NGS tester.
  3. Program 2 ignition keys to enable vehicle. To program any additional keys. See either KEY PROGRAMMING - USING 2 PROGRAMMED KEYS  or KEY PROGRAMMING - USING DIAGNOSTIC EQUIPMENT  .
Fig 1: Locating Data Link Connector & Identifying DLC Terminals
G00162052Courtesy of FORD MOTOR CO.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.