AUTOMATIC TRANSMISSION SYSTEM(for 1GR-FE) PRECAUTION


  1. IGNITION SWITCH EXPRESSION

    Tech Tips

    The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.

    Expression Ignition Switch (Position) Engine Switch (Condition)
    Ignition Switch off LOCK Off (Lock)
    Ignition Switch ACC ACC On (ACC)
    Ignition Switch ON ON On (IG)
    Engine Start START On (Start)
  2. PRECAUTION

    Note


    • When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.

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    • Perform the Reset Memory procedures (A/T initialization) after replacing the automatic transmission assembly, transmission valve body assembly or any of the shift solenoid valves.

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      Tech Tips

      Reset Memory cannot be completed by only reconnecting the cable to the negative (-) battery terminal.

    • If either of the following conditions is met, perform ATF Thermal Degradation Estimate Reset.

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      • The ATF has been replaced.

      • Approximately 50% or more of the ATF has been replaced during a repair of the transmission or a similar operation.

    • Perform Registration (VIN registration) when replacing the ECM.

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    CAUTION:

    When using compressed air, always aim away from yourself to prevent Automatic Transmission Fluid (ATF) or kerosene from spraying on your face.

    Note


    • The automatic transmission is composed of precision-made parts, necessitating careful inspection before reassembly because even a small nick could cause fluid leakage or affect performance.

    • The procedures are organized so that you work on only one component group at a time. This will help avoid confusion with similar-looking parts of different sub-assemblies being on your workbench at the same time.

    • The component groups are inspected and repaired from the converter housing side.

    • Whenever possible, complete the inspection, repair and reassembly before proceeding to the next component group. If a defect is found in a certain component group during reassembly, inspect and repair this group immediately. If a component group cannot be assembled because parts are being ordered, be sure to keep all parts of the group in a separate container while proceeding with disassembly, inspection, repair and reassembly of other component groups.

    • Use of Toyota Genuine ATF WS is recommended.

    • All disassembled parts should be washed clean, and compressed air should be blown through any fluid passages and holes.

    • Dry all parts with compressed air. Never use cloth.

    • The recommended ATF or kerosene should be used for cleaning.

    • After cleaning, the parts should be arranged in the order they were removed for efficient inspection, repairs and reassembly.

    • New discs for the brakes and clutches that will be used for replacement must be soaked in ATF for at least 15 minutes before reassembly.

    • All oil seal rings, clutch discs, clutch plates, rotating parts and sliding surfaces should be coated with ATF prior to reassembly.

    • All old gaskets and rubber O-rings must be replaced.

    • Do not apply adhesive cement to gaskets and similar parts.

    • Make sure that the ends of the snap rings are not aligned with any cutouts. Also make sure that snap rings are correctly installed into the grooves.

    • If a worn bushing is to be replaced, the sub-assembly containing the bushing must also be replaced.

    • Check the thrust bearings and races for wear or damage. Replace them if necessary.

    • Use petroleum jelly to keep parts in place.

    • When working with FIPG material, the following must be observed:


      • Using a razor blade and a gasket scraper, remove all the old packing (FIPG) material from the gasket surface.

      • Thoroughly clean all components to remove any loose material.

      • Clean both sealing surfaces with a non-residue solvent.

      • Parts must be reassembled within 10 minutes of application. Otherwise, the packing (FIPG) material must be removed and reapplied.