2003 Lexus GS 430FACTORY OEM SERVICE PROCEDURE

Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2004 Lexus GS 430 and 2004 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Diagnostic Trouble Code Chart
G01484990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. PHYSICAL ADDRESS: 110 MULTI DISPLAY 

    HINT:

    • *1 : Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.
    • *2: It is stored when 180 sec. has passed after the power supply connector is pulled out after engine start.
    • *3: It may be stored when the engine key is turned again after engine start.
    • *4: It may be stored when the engine key is turned 1 min. again after engine start.
    1. Logical address: 01 (Communication control) f
      Fig 2: Multi Display Table
      G01484991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Logical address: 21 (Switch) f
      Fig 3: Logical Address: 21 (Switch) Table
      G01484992Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Logical address: 34 (Front passenger monitor) f
      Fig 4: Logical Address: 34 (Front Passenger Monitor) Table
      G01484993Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. PHYSICAL ADDRESS: 190 RADIO RECEIVER ASSEMBLY 

    HINT:

    • *1: Even if no failure is detected, it may be stored depending on the battery condition or voltage FC starting an engine.
    • *2: It is stored when 180 sec. has passed after the power supply connector is pulled out after engine start.
    • *3: It may be stored when the engine key is turned 1 min. again after engine start.
    • *4: It may be stored when the engine key is turned again after engine start.
    • *5: When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
    1. Logical address: 01 (Communication control) f
      Fig 5: Radio Receiver Assembly Diagnosis Table
      G01484994Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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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