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Home >> Lexus >> 2019 >> LS 500 Base, RWD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Automatic Transmission System (Aga0E) - Service Information (1 Of 2) >> Automatic Transmission Fluid >> Adjustment [10/2020 - 10/2023] >> Procedure

Adjustment [10/2020 - 10/2023]: Procedure

  1. AIR SUSPENSION CONTROL PROHIBITED (w/ Air Suspension) 

    Refer to PRECAUTION [12/2017 - ]

  2. REMOVE TRANSMISSION UNDER COVER 

    Refer to PROCEDURE - Step 16 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 16 [10/2022 - 10/2023]

  3. BEFORE FILLING TRANSMISSION 
    • The AGA0E automatic transmission assembly requires Toyota Genuine ATF WS.

      Using transmission fluid other than the above type may cause abnormal noise or vibration, or damage the transmission of your vehicle.

    • If the entire automatic transmission assembly, automatic transmission oil pan sub-assembly, drain plug, transmission valve body assembly and/or torque converter assembly have/has been replaced, proceed to the Fill Transmission procedure.
    • If the flange yoke type T oil seal has been replaced and/or an automatic transmission fluid leak has been replaced, proceed to the Adjust Fluid Temperature procedure.
  4. FILL TRANSMISSION PAN WITH FLUID 
    1. Lift the vehicle.
      NOTE:

      The automatic transmission fluid level cannot be measured accurately if the vehicle is not level. Make sure it is held level.

    2. Remove the refill plug and gasket from the automatic transmission assembly.
      GTY835724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a 6 mm hexagon socket wrench, remove the overflow plug from the automatic transmission assembly.
      GTY835759Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      The overflow plug and drain plug are located nearby one another. Make sure not to remove the incorrect plug.

      GTY782387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Drain Plug
      *2 Overflow Plug
      Front of Vehicle
    4. Add automatic transmission fluid to the refill hole until it flows out of the overflow hole.
      GTY808143Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Refill Hole
      *b Overflow Hole
      *c Cloth
      NOTE:
      • Use Toyota Genuine ATF WS.

        Using transmission fluid other than the above type may cause abnormal noise or vibration, or damage the transmission of your vehicle.

      • Be sure to add automatic transmission fluid slowly. If automatic transmission fluid is added quickly, the automatic transmission fluid may hit internal parts and bounce back, resulting in automatic transmission fluid coming out of the refill hole.

      HINT: 

      When pouring automatic transmission fluid into the refill hole, cover the area surrounding the refill hole with a cloth.

      If automatic transmission fluid adheres to the automatic transmission oil pan sub-assembly, it may be mistaken for an automatic transmission fluid leak.

    5. Wait until the automatic transmission fluid flow slows and only drips come out.
      GTY813817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using a 6 mm hexagon socket wrench, temporarily install the overflow plug to the automatic transmission assembly.
      GTY835759Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      Reuse the old O-ring as the overflow plug will be removed again.

  5. FILL TRANSMISSION 
    1. Fill the automatic transmission assembly with the correct amount of automatic transmission fluid as listed in the table below.

      Standard Capacity

      Performed Repair Fill Amount
      Removal and installation of the automatic transmission oil pan sub-assembly and drain plug 0.7 liters (0.7 US qts, 0.6 Imp. qts)
      Removal and installation of the transmission valve body assembly 1.1 liters (1.2 US qts, 1.0 Imp. qts)
      Removal and installation of the torque converter assembly 3.8 liters (4.0 US qts, 3.3 Imp. qts)

      HINT: 

      • When pouring automatic transmission fluid into the refill hole, cover the area surrounding the refill hole with a cloth.

        If automatic transmission fluid adheres to the automatic transmission oil pan sub-assembly, it may be mistaken for an automatic transmission fluid leak.

      • If the specified amount of automatic transmission fluid cannot be added, perform the following:
      1. Temporarily install the gasket and refill plug to the automatic transmission assembly.

        HINT: 

        Gasket replacement and tightening of the refill plug are performed after the automatic transmission fluid level is adjusted.

      2. Lower the vehicle.
      3. Depress and hold the brake pedal.
      4. Start the engine.
        NOTE:

        To reduce load, make sure that all electrical systems, such as the air conditioning, electric fan and audio system, are off.

      5. Slowly move the shift position from P to M in the order of P → R → N → D → M, and then move the shift position back to P.

        HINT: 

        Keep the shift position in each position for approximately 3 seconds.

      6. Allow the engine to idle for 30 seconds to warm it up.
      7. Turn the engine switch off.
      8. Remove the refill plug and gasket from the automatic transmission assembly.
      9. Fill the automatic transmission assembly with the correct amount of automatic transmission fluid as listed in the table above.
        NOTE:
        • Use Toyota Genuine ATF WS.

          Using transmission fluid other than the above type may cause abnormal noise or vibration, or damage the transmission of your vehicle.

        • Be sure to add automatic transmission fluid slowly. If automatic transmission fluid is added quickly, the automatic transmission fluid may hit internal parts and bounce back, resulting in automatic transmission fluid coming out of the refill hole.

        HINT: 

        When pouring automatic transmission fluid into the refill hole, cover the area surrounding the refill hole with a cloth.

        If automatic transmission fluid adheres to the automatic transmission oil pan sub-assembly, it may be mistaken for an automatic transmission fluid leak.

      10. Temporarily install the gasket and refill plug to the automatic transmission assembly.

        HINT: 

        Gasket replacement and tightening of the refill plug are performed after the automatic transmission fluid level is adjusted.

  6. ADJUST FLUID TEMPERATURE 
    NOTE:
    • Always adjust the automatic transmission fluid level when the fluid temperature is appropriate for checking the fluid level.
    • Use the shift position indicator light in the vehicle combination meter or the Techstream to check whether the fluid temperature is appropriate for checking the fluid level. Even when using the Techstream, it is necessary to switch to fluid temperature detection mode for optimum fluid temperature control.
    1. Switch to fluid temperature detection mode (When using Techstream)
      1. Connect the Techstream to the DLC3 with the engine switch off.
      2. Turn the engine switch on (IG) and turn the Techstream on.
        NOTE:

        To reduce load, make sure that all electrical systems, such as the air conditioning, electric fan and audio system, are off.

      3. Enter the following menus: Powertrain / Transmission / Active Test / Activate the TC Terminal.
      4. Select the Active Test menu: Activate the TC Terminal / ON.
      5. Select the Data List item: A/T Oil Temperature No. 1.

        Powertrain > Transmission > Active Test 

        Active Test Display
        Activate the TC Terminal
        Data List Display
        A/T Oil Temperature No. 1
      6. Before beginning work, be sure to check that the automatic transmission fluid temperature is below the lower limit of the permissible temperature range for adjusting fluid levels.

        The Permissible Temperature Range for Adjusting Automatic Transmission Fluid

        35 to 38°C (95 to 100°F)

        NOTE:

        If the automatic transmission fluid temperature is higher than permissible temperature range for adjusting fluid levels, suspend work immediately. Lower the temperature to the lower limit of the permissible temperature range or less by moving the vehicle to a cooler location, etc.

      7. Depress and hold the brake pedal.
      8. Start the engine.
        NOTE:

        To reduce load, make sure that all electrical systems, such as the air conditioning, electric fan and audio system, are off.

      9. Slowly move the shift position from P to M in the order of P → R → N → D → M to circulate the automatic transmission fluid through each part of transmission, and then move the shift position back to P.

        HINT: 

        Keep the shift position in each position for approximately 3 seconds.

      10. From the shift position in D, move the shift lever between N and D within 1.5 seconds for 6 seconds or more continuously to switch to fluid temperature detection mode.
        NOTE:

        Hold the shift lever in N for 1 second or more and hold the shift lever in D for 0.1 seconds or more before moving the shift lever.

        HINT: 

        When switched to fluid temperature detection mode, the combination meter D shift position indicator display illuminates for 2 seconds and then turns off, no matter what position the shift position is in.

        GTY788235Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Shift Lever Position *b Shift Position
        *c Shift Indicator Display *d Temperature Adjustment Mode
        *e 0.1 seconds *f 1 second
        *g Within 1.5 seconds *h 6 seconds or more
        *i 2 seconds *j Home
      11. Return the shift position to P and turn off the Active Test "Activate the TC Terminal" on the Techstream. (Disconnect the TC terminal)
        NOTE:

        Make sure that the TC terminal is disconnected. If the TC terminal is connected, the automatic transmission fluid level cannot be precisely adjusted due to fluctuations in engine speed.

        HINT: 

        Even after the TC terminal is disconnected, fluid temperature detection mode is active until the engine switch off.

    2. Switch to fluid temperature detection mode (When not using Techstream)
      NOTE:

      Make sure to switch to fluid temperature detection mode within 60 seconds after starting the engine.

      1. Depress and hold the brake pedal.
      2. Start the engine.
        NOTE:

        To reduce load, make sure that all electrical systems, such as the air conditioning and audio system are off.

      3. Slowly move the shift position from P to M in the order of P → R → N → D → M to circulate the automatic transmission fluid through each part of the transmission, and then move the shift position back to P.

        HINT: 

        Keep the shift position in each position for approximately 3 seconds.

      4. From the shift position in D, move the shift lever between N and D within 1.5 seconds for 12 seconds or more continuously to switch to fluid temperature detection mode.
        NOTE:

        Hold the shift lever in N for 1 second or more and hold the shift lever in D for 0.1 seconds or more before moving the shift lever.

        HINT: 

        • When switched to fluid temperature detection mode, the combination meter D shift position indicator display illuminates for 2 seconds and then turns off, no matter what position the shift position is in.
        • Fluid temperature detection mode is active until the engine switch off.
        GTY968561Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Shift Lever Position *b Shift Position
        *c Shift Indicator Display *d Temperature Adjustment Mode
        *e 0.1 seconds *f 1 second
        *g Within 1.5 seconds *h 12 seconds or more
        *i 2 seconds *j Home
        *k Within 60 seconds *l Start the Engine
      5. Return the shift position to P.
    3. Adjust the automatic transmission fluid temperature to the appropriate temperature for the automatic transmission fluid level adjusting procedure.
      1. Check the automatic transmission fluid temperature by the shift position indicator.

        HINT: 

        • In fluid temperature detection mode, the combination meter D shift position indicator display illuminates, turns off, or blinks depending on the automatic transmission fluid temperature.
        • The automatic transmission fluid adding procedure should be performed when the combination meter D shift position indicator display is illuminated.
      2. Adjust the automatic transmission fluid temperature.

        HINT: 

        Adjust the automatic transmission fluid level when the combination meter D shift position indicator display is illuminated.

        1. If the combination meter D shift position indicator display is not illuminated, idle the engine to warm it up until the combination meter D shift position indicator display illuminates.
        2. If the combination meter D shift position indicator display is illuminated, immediately begin to adjust the automatic transmission fluid level.
        3. If the combination meter D shift position indicator display is blinking, stop the engine to cool the automatic transmission fluid. Once the automatic transmission fluid temperature drops to the appropriate level, perform the automatic transmission fluid level adjustment procedure again.

        D Shift Indicator

          Below Automatic Transmission Fluid Level Adjustment Temperature Automatic Transmission Fluid Level Adjustment Temperature Above Automatic Transmission Fluid Level Adjustment Temperature
        Automatic Transmission Fluid Temperature
        (Techstream Display Temperature)        		 35°C or less
        (95°F or less)        		 35 to 38°C
        (95 to 100°F)        		 38°C or more
        (100°F or more)
        D Shift Indicator OFF ON Blinks
    4. Using a 6 mm hexagon socket wrench, remove the overflow plug from the automatic transmission assembly, and check the fluid level when the fluid temperature is appropriate for checking the fluid level.
      GTY835759Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WARNING:

      Be careful as the automatic transmission fluid that comes out is hot.

      NOTE:

      The overflow plug and drain plug are located nearby one another. Make sure not to remove the incorrect plug.

      GTY782387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Drain Plug
      *2 Overflow Plug
      Front of Vehicle
    5. Check that the condition of the automatic transmission fluid coming out of the overflow hole.
      NOTE:
      • Check the automatic transmission fluid level with the engine running. Therefore, make sure not to touch the high temperature parts such as the exhaust pipe, etc.
      • If only a small amount of automatic transmission fluid (approximately 5.0 cc (0.3 cu.in.)) comes out of the overflow hole, it is possible that only the automatic transmission fluid remaining in the overflow tube has come out. This is not considered to be overflow and the automatic transmission fluid must be refilled.

      HINT: 

      Overflow refers to when automatic transmission fluid is discharged from the overflow tube.

      1. When automatic transmission fluid comes out. (Go to "When automatic transmission fluid comes out")
      2. When automatic transmission fluid does not come out. (Go to "When automatic transmission fluid does not come out")
    6. When automatic transmission fluid comes out:
      1. If the amount of automatic transmission fluid that flows out is large, wait until the automatic transmission fluid flow slows and only drops come out.
        GTY813817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

        The automatic transmission fluid flow will not stop completely because the automatic transmission fluid continues to expand as its temperature increases.

    7. When automatic transmission fluid does not come out:
      1. Remove the refill plug and gasket from the automatic transmission assembly.
        GTY835724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Add automatic transmission fluid to the refill hole until it flows out of the overflow hole.
        GTY808143Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Refill Hole
        *b Overflow Hole
        *c Cloth
        NOTE:
        • Use Toyota Genuine ATF WS.

          Using transmission fluid other than the above type may cause abnormal noise or vibration, or damage the transmission of your vehicle.

        • Be sure to add automatic transmission fluid slowly. If automatic transmission fluid is added quickly, the automatic transmission fluid may hit internal parts and bounce back, resulting in automatic transmission fluid coming out of the refill hole.

        HINT: 

        When pouring automatic transmission fluid into the refill hole, cover the area surrounding the refill hole with a cloth.

        If automatic transmission fluid adheres to the automatic transmission oil pan sub-assembly, it may be mistaken for an automatic transmission fluid leak.

      3. Wait until the automatic transmission fluid flow slows and only drips come out.

        HINT: 

        The automatic transmission fluid flow will not stop completely because the automatic transmission fluid continues to expand as its temperature increases.

        GTY813817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Remove the O-ring from the overflow plug.
    9. Install a new O-ring to the overflow plug.
    10. Using a 6 mm hexagon socket wrench, install the overflow plug to the automatic transmission assembly.

      Torque: 40 N.m (408 kgf/cm, 30 ft.lbf) 

    11. Coat a new gasket with automatic transmission fluid.
      GTY838402Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Refill Plug
      *2 Gasket
      *a Refill Hole
    12. Install the gasket and refill plug to ATF.

      Torque: 40 N.m (408 kgf/cm, 30 ft.lbf) 

    13. Lower the vehicle.
    14. Turn the engine switch off and disconnect the Techstream. (When using Techstream)
    15. Turn the engine switch off. (When not using Techstream)
  7. AFTER FILLING AUTOMATIC TRANSMISSION 
    1. Lift the vehicle.
    2. Clean each part and check for automatic transmission fluid leaks.
    3. Lower the vehicle.
    4. Operation complete.
  8. ATF THERMAL DEGRADATION ESTIMATE RESET 
    NOTE:

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

    Refer to INITIALIZATION [12/2017 - ]

  9. INSTALL TRANSMISSION UNDER COVER 

    Refer to PROCEDURE - Step 188

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