2008 Lexus IS 350FACTORY OEM SERVICE PROCEDURE

Automatic Transmission System: Initialization

  1. RESET MEMORY 
    NOTE:
    • Perform the RESET MEMORY (AT initialization) when replacing the automatic transmission assembly, engine assembly or ECM.
    • The RESET MEMORY can be performed only with the Techstream.

    HINT:

    The ECM memorizes the condition that the ECT controls the automatic transmission assembly and engine assembly according to those characteristics. Therefore, when the automatic transmission assembly, engine assembly, or ECM has been replaced, it is necessary to reset the memory so that the ECM can memorize the new information.

    Reset procedure is as follows.

    1. Turn the engine switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG) position.
    4. Turn the Techstream main switch on.
    5. Enter the following menu: Powertrain / Engine and ECT / Utility / Reset Memory. Then, press "Next".
    6. Perform the reset memory procedure from the main menu.
      CAUTION: After performing the RESET MEMORY, be sure to perform the ROAD TEST  described earlier.

      HINT:

      The ECM is learned by performing the ROAD TEST.

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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.

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