2002 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST USING HAND-HELD TESTER 
    1. Connect the hand-held tester (with CAN VIM) to the DLC3.
    2. Turn the ignition switch ON and press the hand-held tester main switch ON.
    3. Select the item below in the ACTIVE TEST and then check that the smart indicator operates.

      Theft warning ECU: 

      Fig 1: Hand-Held Tester Display Chart
      G01444270Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    Smart indicator turns on and off. 

    NG: Go to step 2 

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 

  2. INSPECT RHEOSTAT 
    1. Remove the rheostat.
    2. Apply 12 V positive (+) voltage between the terminals of the indicator and check the lighting condition of the smart indicator.

      OK: Go to next step 

      Fig 2: Voltage Specifications
      G01444271Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Chapter Navigation
Return to Chapter: Smart Indicator Circuit
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.