2005 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Inspection Procedure

  1. CHECK BASIC FUNCTION 
    1. Check that the door control transmitter and driver's door lock can control all the doors to lock and unlock normally.

      Result: 

      BASIC FUNCTION RESULT

      Result Proceed to
      Both of them work normally A
      Transmitter does not work normally B
      Driver's door lock does not work normally C
    1. B: Go to WIRELESS DOOR LOCK CONTROL SYSTEM (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    2. C: Go to POWER DOOR LOCK CONTROL SYSTEM (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    3. A: Go to next step. 
  2. CHECK MANUAL UP/DOWN FUNCTION 
    1. Check that the manual UP/DOWN function using the master switch and regulator switch can operate all the power windows.

      OK: Manual UP/DOWN function operates normally. 

    1. NG: OTHER PROBLEM (See  PROBLEM SYMPTOMS TABLE   ) 
    2. OK: Go to next step. 
  3. CHECK REMOTE UP/DOWN FUNCTION 
    1. Check that the remote UP/DOWN function using the master switch can operate the power windows.

      OK: Remote UP/DOWN function operates normally. 

    1. NG: OTHER PROBLEM (See  REMOTE UP/DOWN FUNCTION DOES NOT OPERATE   ) 
    2. OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH 
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.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.