HYBRID TRANSMISSION FLUID ADJUSTMENT

CAUTION / NOTICE / HINT

CAUTION:


  • B004R23

    Be careful not to burn yourself when the transmission fluid temperature is high.

  • B004U93

    To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and cooling fans when working in the engine compartment with the power switch on (READY) or the power switch on (IG).

  • B004XBA

    To prevent burns, do not touch the engine, exhaust pipe or other high temperature components while the engine is hot.

PROCEDURE


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

    Click here

  2. REMOVE TRANSMISSION UNDER COVER

    Click here

  3. ADD TRANSMISSION FLUID

    Note


    • This transmission requires Toyota Genuine ATF WS.

    • Make sure to enter fluid temperature detection mode before checking or adding transmission fluid.

    • Always maintain the vehicle in a level position when adding, checking and adjusting the transmission fluid.

    • When a large volume of fluid must be replenished (such as when replacing the transmission valve body assembly or removing and installing the oil pan and drain plug), perform tasks from "Add Transmission Fluid" to "Adjust Transmission Fluid".

    • When a large volume of transmission fluid must be replenished (such as when bleeding oil, replacing the hybrid vehicle transmission assembly and when the oil cooler hose has been disconnected), perform "Adjust Transmission Fluid".


    1. Check vehicle condition


      1. Connect the GTS to the DLC3 with the power switch off.

      2. Turn the power switch on (IG).

      3. Turn the GTS on.

      4. Enter the following menus: Powertrain / Hybrid Control / Data List / Transmission Fluid Temperature.


        Powertrain > Hybrid Control > Data List
        Tester Display
        Transmission Fluid Temperature

        Note

        The temperature of the transmission fluid will rise if the power switch is turned on (READY). Therefore, check the Data List while the power switch is turned on (IG).

      5. Before beginning work, be sure to check that the transmission fluid temperature is lower limit of the permissible temperature range for adjusting fluid levels or less.

        The Permissible Temperature Range for Adjusting Transmission Fluid
        30 to 40°C (86 to 104°F)

        Note


        • The transmission fluid level cannot be accurately adjusted if the transmission fluid temperature is higher than the permissible temperature range for adjusting fluid levels.

        • Move the vehicle to a cool location and make sure that the transmission fluid temperature is below the lower limit of the permissible temperature range for adjusting fluid levels or less.

    2. Confirming the work


      1. Perform the adjustment according to the procedures referenced below.

        B004R4DE02

    3. [*1] Add transmission fluid.


      1. Lift the vehicle.

        Note

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

      2. B004Y1L

        Remove the refill plug and gasket from the hybrid vehicle transmission assembly.

      3. B004X7Z

        Using a 5 mm hexagon socket wrench, remove the overflow plug and gasket from the hybrid vehicle transmission assembly.

      4. B004TY2

        Add transmission fluid to the refill hole until it flows out of the overflow plug hole.

        Note


        • Use Toyota Genuine ATF WS.

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

      5. B004RKX

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

      6. B004X7Z

        Using a 5 mm hexagon socket wrench, temporarily install the overflow plug and gasket to the hybrid vehicle transmission assembly.

        Tech Tips

        Reuse the old gasket as the overflow plug will be removed again.

      7. B004VTO

        Pour the specified amount of transmission fluid into the refill hole.

        Standard Capacity
        1.6 liters (1.7 US qts, 1.4 Imp. qts)

        Note


        • Use Toyota Genuine ATF WS.

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

      8. Temporarily install the gasket and refill plug to the hybrid vehicle transmission assembly.

        Tech Tips

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

  4. ADJUST TRANSMISSION FLUID

    Note


    • Always adjust the 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 GTS to check whether the fluid temperature is appropriate for checking the fluid level. Even when using the GTS, it is necessary to switch to fluid temperature detection mode for optimum fluid temperature control.


    1. [*2] Switch to fluid temperature detection mode (When using GTS)


      1. Connect the GTS to the DLC3 with the power switch off.

      2. Turn the power switch on (IG).

      3. Turn the GTS on.

      4. Enter the following menus: Powertrain / Hybrid Control / Active Test / Connect the TC and TE1.

      5. Select the Active Test menu: Connect the TC and TE1 / ON.

      6. Select the Data List item: Transmission Fluid Temperature.


        Powertrain > Hybrid Control > Active Test
        Active Test Display
        Connect the TC and TE1
        Data List Display
        Transmission Fluid Temperature

      7. Before beginning work, be sure to check that the transmission fluid temperature is the below the lower limit of the permissible temperature range for adjusting fluid levels.

        The Permissible Temperature Range for Adjusting Transmission Fluid
        30 to 40°C (86 to 104°F)

        Note

        If the transmission fluid temperature is higher than the 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.

      8. Depress and hold the brake pedal.

      9. Turn the power switch on (READY).

        Note


        • Make sure to place the electrical key transmitter within the vehicle interior detection area.

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

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

        Tech Tips

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

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

        Note

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

        Tech Tips

        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 lever is in.

        B004V33C02
        *a Shift Position *b Shift Judgment
        *c Shift Indicator Display *d Temperature Adjustment Mode
        *e 0.1 seconds *f 1 seconds
        *g Within 1.5 seconds *h 6 seconds or more
        *i 2 seconds *j Home

      12. Return the shift position to P and turn off the Active Test "Connect the TC and TE1" on the GTS. (Disconnect the TC terminal)

        Note

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

        Tech Tips

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

    2. [*3] Switch to fluid temperature detection mode (When TC terminal connected)


      1. B004WWQC13
        *a Front view of DLC3

        Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3 with the power switch off.

        SST
        09843-18040

      2. Depress and hold the brake pedal.

      3. Turn the power switch on (READY).

        Note


        • Make sure to place the electrical key transmitter within the vehicle interior detection area.

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

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

        Tech Tips

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

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

        Note

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

        Tech Tips

        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 lever is in.

        B004V33C02
        *a Shift Position *b Shift Judgment
        *c Shift Indicator Display *d Temperature Adjustment Mode
        *e 0.1 seconds *f 1 seconds
        *g Within 1.5 seconds *h 6 seconds or more
        *i 2 seconds *j Home

      6. Return the shift position to P, and release the TC (13) - CG (4) connection. (Disconnect the TC terminal)

        Note

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

        Tech Tips

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

    3. Adjust the transmission fluid temperature to the appropriate temperature for the transmission fluid level adjusting procedure.


      1. Check the transmission fluid temperature by the shift position indicator.

        Note


        • In fluid temperature detection mode, the D shift position indicator illuminates, turns off, or blinks depending on the transmission fluid temperature.

        • The transmission fluid adding procedure should be performed when the D shift position indicator is illuminated.

      2. Adjust the transmission fluid temperature.

        Note

        Adjust the transmission fluid level when the D shift position indicator is illuminated.


        1. If the D shift position indicator is not illuminated, idle the engine to warm it up until the D shift position indicator illuminates.

        2. If the D shift position indicator is illuminated, immediately begin to adjust the transmission fluid level.

        3. If the D shift position indicator is blinking, stop the engine to cool the transmission fluid. Once the transmission fluid temperature drops to the appropriate level, perform the transmission fluid level adjustment procedure again.

        D Shift Indicator
        Below Transmission Fluid Level Adjustment Temperature Transmission Fluid Level Adjustment Temperature Above Transmission Fluid Level Adjustment Temperature

        Transmission Fluid Temperature

        (GTS Display Temperature)

        30°C or less

        (86°F or less)

        30 to 40°C

        (86 to 104°F)

        40°C or more

        (104°F or more)
        D Shift Indicator OFF ON Blinks
    4. B004X7Z

      Using a 5 mm hexagon socket wrench, remove the overflow plug and gasket from the hybrid vehicle transmission assembly.

      CAUTION:

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

    5. [*4] Check that the condition of the transmission fluid coming out of the overflow hole.

      Note


      • Check the transmission fluid level with the power switch on (READY). Therefore, make sure not to touch the high temperature parts such as the exhaust pipe, etc.

      • If only a small amount of transmission fluid (approximately 5 cc (0.3 cu.in.)) comes out of the overflow hole, it is possible that only the transmission fluid remaining in the overflow tube has come out. This is not considered to be overflow and the transmission fluid must be refilled.

      Tech Tips

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


      1. When transmission fluid comes out. (Go to "When transmission fluid comes out")

      2. When transmission fluid does not come out. (Go to "When transmission fluid does not come out")

    6. B004RKX

      [*5] When transmission fluid comes out:


      1. If the amount of transmission fluid that flows out is large, wait until the transmission fluid flow slows and only drops come out.

        Tech Tips

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

    7. [*6] When transmission fluid does not come out:


      1. B004Y1L

        Remove the refill plug and gasket from the hybrid vehicle transmission assembly.

      2. B004TY2

        Add transmission fluid to the refill hole until it flows out of the overflow hole.

        Note


        • Use Toyota Genuine ATF WS.

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

      3. B004RKX

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

        Tech Tips

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

    8. B004USMC01
      *1 Gasket

      Using a 5 mm hexagon socket wrench, install the overflow plug and a new gasket to the hybrid vehicle transmission assembly.

      Torque:
      20 N*m  { 204 kgf*cm, 15 ft.*lbf }

      Note

      Install the flat side of the gasket to the drain plug side.

    9. B004Y1L

      Coat a new gasket with transmission fluid.

    10. Install the refill plug and gasket to the hybrid vehicle transmission assembly.

      Torque:
      40 N*m  { 408 kgf*cm, 30 ft.*lbf }

    11. Lower the vehicle.

    12. Turn the power switch off and disconnect the GTS. (When using GTS)

    13. Turn the power switch off. (When TC terminal connected)

  5. AFTER FILLING HYBRID TRANSMISSION


    1. Lift the vehicle.

    2. Clean each part and check for transmission fluid leaks.

    3. Lower the vehicle.

    4. Operation complete.

  6. INSTALL TRANSMISSION UNDER COVER

    Click here