2008 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Data List / Active Test

  1. PERFORM ACTIVE TESTΒ 

    HINT:

    Performing the Techstream Active Test allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the Active Test early in troubleshooting is one way to save time.

    1. Connect the Tecshtream to the DLC3.
    2. Turn the ignition switch ON.
    3. Perform the Active Test by following the directions on the Techstream screen.

      Body No. 4Β 

      ACTIVE TEST - BODY NO. 4

      Tester Display Test Part Control Range Diagnostic Note
      Rear Defogger Operate rear window defogger wire OFF or ON -
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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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