2008 Lexus LX 570FACTORY OEM SERVICE PROCEDURE

Inspection Procedure

  1. CHECK LIN COMMUNICATION SYSTEM 
    1. Check for LIN communication system DTCs related to the power window control system (See DTC CHECK / CLEAR ).

      OK: LIN communication system DTCs are not output. 

    NG: GO TO LIN COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

    OK: Go to next step 

  2. CHECK MULTIPLEX NETWORK MASTER SWITCH (WINDOW LOCK SWITCH) 
    1. Turn the window lock switch off and operate the switches on the multiplex network master switch. Check that the remote up/down function operates (See OPERATION CHECK  ).

      OK: Remote up/down function operates. 

    NG: REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY  (See REMOVAL  )

    Fig 1: Identifying Window Lock Switch
    G04952071Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: END 

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:

  • • 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.

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