2002 Lexus ES 300FACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

  1. Inspection throttle body.
    1. Inspect the throttle control motor for operating sound.
      1. Turn the ignition switch ON.
      2. When turning the accelerator pedal position sensor lever, check the running sound of the motor. Also, check that there is no friction sound.
    2. Inspect the throttle position sensor.
      1. Connect the hand-held tester or OBD II scan tool to the DLC3.
      2. Turn the ignition switch ON.
      3. Check that the check engine warning light does not light up.
      4. Check that the throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA shown the standard value.

      Standard Throttle Valve Opening Percentage:  60 percent or more

  2. Inspect accelerator pedal position sensor.
    1. When turning ignition switch ON, check that the voltage of the throttle position sensor CURRENT DATA shown is within the standard voltage.

    Standard voltage:  0.6-1.0 volt

  3. Inspect camshaft timing oil control valve assembly.
    1. Connect the hand-held tester or OBD II scan tool to the DLC3.
    2. Turn the ignition switch ON.
    3. Start the engine and warmed it up.
    4. Connect the hand-held tester and select the VVT from the ACTIVE TEST menu.
    5. Check the engine speed when the OCV is operated by the hand-held tester.
      1. Standard: 
        1. VVT system is OFF (OCV is OFF):  Normal engine speed
        2. VVT system is ON (OCV is ON):  Rough idle or engine stalled
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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:

  • • 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.