2000 Lexus LS 400FACTORY OEM SERVICE PROCEDURE

Key Unlock Warning Switch

WARNING: This page is about a different car, the 2000 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect key unlock warning switch 2-pin connector (located in steering column, near ignition switch). With key in ignition, check continuity between switch terminals No. 1 and 2. Continuity should exist. With key removed from ignition, check continuity between terminals No. 1 and 2. Continuity should not exist. If continuity is not as specified, replace key unlock warning switch.

Factory Service Tools

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When to See a Mechanic

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

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