1990 Lexus LS 400FACTORY OEM SERVICE PROCEDURE

Remote Keyless Entry System

For RKE trouble shooting, see Fig 1. Numbers in chart refer to order in which circuits or components should be tested. If the instruction "proceed to next circuit inspection in system tests index table" is given in the flow chart for each circuit, proceed to the circuit with the next number in the table to continue the check.

Fig 1: Remote Keyless Entry (RKE) Trouble Shooting
G00166968Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
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.

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