AUTOMATIC TRANSAXLE SYSTEM PRECAUTION


  1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

    Note

    When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected:

    System See Procedure
    LKA/LDA system

    Click here

    Intelligent clearance sonar system
    Pre-crash safety system

    Lighting system (EXT)


    • Cornering lights

    Adaptive high beam system
    Stop and start system
    Parking assist monitor system (w/ Parallel Parking Assist Function)
    Parking assist monitor system (w/o Parallel Parking Assist Function)
    Panoramic view monitor system
    Power door lock control system
    Power back door system
  2. PROCEDURES NECESSARY WHEN ECM OR OTHER PARTS ARE REPLACED

    Note


    • Before replacing the ECM, refer to Service Bulletin.

    • If any parts are replaced, perform the following procedures as necessary referring to the table below.

      Replaced Part Reset Memory*1 Set Transaxle Compensation Code Learning by Driving (Road Test)
      Automatic transaxle assembly -*2 Input*3 Perform
      Shift solenoid valve SL1 and SL2 - - Perform

      • Transmission valve body assembly

      • Shift solenoid valve SL3, SL4 and SL5

      - Initialize Perform

      ECM

      (If possible, read the transaxle compensation code from the previous ECM)

      Possible - Input (into the new ECM)*4 Perform
      Impossible - Initialize*5 Perform
      Engine assembly Perform - Perform

    Tech Tips


    • *1: Reset Memory cannot be completed by only disconnecting and reconnecting the cable to the negative (-) battery terminal.

    • *2: When "Set Transaxle Compensation Code" is performed, "Reset Memory" is automatically completed.

    • *3: Set the transaxle compensation code for the new automatic transaxle.

    • *4: Read the transaxle compensation code from the previous ECM, then transfer it to the new ECM.

    • *5: Set the transaxle compensation code of the current automatic transaxle.

    • Registration of the transaxle compensation code.

      Click here

    • Learning by driving (Road Test).

      Click here

    • Reset Memory.

      Click here

  3. HANDLING PRECAUTIONS

    CAUTION:

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

    Note


    • The automatic transaxle is composed of precision-made parts. Careful inspection before reassembly is necessary 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 cleaned, and compressed air should be blown through any fluid passages and holes.

    • Dry all parts with compressed air. Never use a piece of 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, repair and reassembly.

    • New brake discs and clutch discs 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 or similar parts.

    • Make sure that the ends of snap rings are not aligned with any cutouts. 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 seal packing (FIPG), observe the following:


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

      • Thoroughly clean all components to remove any seal packing (FIPG).

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

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