2004 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

System Description

  1. POWER WINDOW CONTROL SYSTEM DESCRIPTION 

    The power window control system controls the power windows' UP/DOWN function using the regulator motors.

    The main controls of this system are: the power window regulator master switch assembly, which is built into the driver side door, and the power regulator switches, which are built into the passenger side door and rear doors. Pressing each regulator switch on the master switch assembly transmits a remote UP/DOWN signal to each door ECU via the BEAN line.

    Then each door ECU transmits this signal to the corresponding power window regulator motor.

  2. FUNCTION OF MAIN COMPONENT 
    Fig 1: Main Component Function Chart
    G01442868Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. SYSTEM FUNCTION 
    • The power window control system has the following functions:
      Fig 2: System Function Chart
      G01442869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

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.