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. READ VALUE OF 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 items below in the DATA LIST and read the displays on the hand-held tester.

      Theft warning ECU: 

      Fig 1: Hand-Held Tester Display Chart
      G01444264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    "OFF" (smart key cancel switch is not pressed) appears on the screen. 

    NG: Go to step 2 

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

  2. INSPECT SMART KEY CANCEL SWITCH ASSY 
    1. Remove the smart key cancel switch assy.
    2. Measure the switch resistance.

      Standard: 

      Fig 2: Resistance Specifications
      G01444265Courtesy 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.