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HOMESERVICE MANUALSCADILLAC1996SEVILLE STSREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSANTI-THEFT SYSTEMTROUBLE SHOOTINGPASS-KEY II(R) SYSTEM
1996 Cadillac Seville STS

Pass-Key II(R) System

1996 Cadillac Seville STSSECTION Pass-Key II(R) System
  1. Look into key opening and check key pellet sensing contacts in ignition key lock cylinder. If contacts are damaged or not Silver in color, replace ignition key lock cylinder. Ensure ignition key lock cylinder wiring is properly routed and not twisted when replacing lock cylinder. See Figure and Figure . Using PASS-Key II(R) Interrogator (J 35628-A), check ignition keys. If key code window displays "E" for error, or display is erratic, replace key.
  2. Check ignition key for cracked, dirty or coated resistor pellet. Ensure key does not have excess plastic around resistor pellet contacts. Check PASS-Key II(R) system fuses. If system is intermittent, check component connectors for tight connections and clean terminals.
  3. If starter enable relay must be replaced, check for short in Purple wire between starter enable relay and starter solenoid. A short in Purple wire may cause starter enable relay to fail.
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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.