2004 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

For Vehicles Equipped With Traction Control (TRAC) System

When testing with a 2-wheel drum tester such as a speedometer tester, a combination tester of the speedometer and bracket a chassis dynamometer, or when jacking up the front wheels and driving the wheels, always turn the TRAC system OFF beforehand via the TRAC OFF switch before testing.

NOTE: TRAC system OFF condition can be confirmed by the "TRAC OFF" warning indicator lamp in the combination meter.Β 
  1. Confirm TRAC system is OFF
    1. Press the TRAC cut switch (TRAC OFF) to turn off the TRAC system.
    2. Check if the TRAC OFF indicator lamp illuminates.
      Fig 1: Identifying TRAC Cut Switch
      G03693779Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      The SLIP indicator lamp should always operate right after the engine is restarted.

    3. Begin testing.
    4. Press the TRAC cut switch to turn on the TRAC system and check that the TRAC OFF indicator lamp turns off.
      Fig 2: Identifying SLIP Indicator Lamp
      G03693780Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The SLIP indicator lamp blinks when the TRAC system is operating.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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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