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Home >> Lexus >> 2017 >> IS 300 F Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Automatic Transmission System (A760H) - Diagnostic Codes (2 Of 3)) >> AUTOMATIC TRANSMISSION SYSTEM (for 2GR-FKS) >> DTC P0750-7F: Shift Solenoid "A" Actuator Stuck Off [10/2017 - 09/2019] >> Procedure

DTC P0750-7F: Shift Solenoid "A" Actuator Stuck Off [10/2017 - 09/2019]: Procedure

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  1. CHECK IF OTHER DTCS OUTPUT 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Transmission / Trouble Codes.

      Powertrain > Transmission > Trouble Codes 

    5. Read the DTCs using the Techstream.

      Result

      Result Proceed to
      Only P0750-7F is output A
      P0750-7F and other DTCs are output B

      HINT: 

      If any DTCs other than P0750-7F are output, perform troubleshooting for those DTCs first.

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2017 - 09/2018]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2018 - 09/2019] 

    Result: 

    A 

    See step  2

  2. PERFORM ACTIVE TEST USING TECHSTREAM 
    NOTE:
    • Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 50 to 80°C (122 to 176°F)
    • Be careful to prevent the SST hose from interfering with the exhaust pipe.
    • This check must be conducted after checking and confirming that the engine is normal.
    • Perform the test with the air conditioning off.

    HINT: 

    Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

    1. Turn the engine switch off.
    2. Lift the vehicle up.
    3. Remove the test plug from the transmission case and connect SST.
      GTY680648Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09993-19016 
        1. 09993-00011
        2. 09993-00041
    4. Lower the vehicle.
    5. Fully apply the parking brake and chock all 4 wheels.
    6. Connect the Techstream to the DLC3.
    7. Start the engine.
    8. Warm up the ATF (Automatic Transmission Fluid).
    9. Measure the line pressure when the engine is idling.
    10. Turn the Techstream on.
    11. Enter the following menus: Powertrain / Transmission / Active Test.
    12. According to the display on the Techstream, perform the "Active Test".
    13. Measure the line pressure with SST.

      Powertrain > Transmission > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Activate the Solenoid (SLT) Operates the shift solenoid valve SLT and raises line pressure ON/OFF
      HINT: 
      ON: No action (normal operation)
      OFF: Line pressure up (When the Active Test of "Activate the Solenoid (SLT)" is performed, the ECM commands the SLT solenoid to turn off).      		 [Vehicle Condition] 
      • Vehicle stopped
      • Engine idling

      Powertrain > Transmission > Active Test 

      Tester Display
      Activate the Solenoid (SLT)

      "Activate the Solenoid (SLT)" in the Active Test is performed to check the line pressure changes by connecting SST to the automatic transmission, which is used in the HYDRAULIC TEST as well.

      Refer to HYDRAULIC TEST [10/2017 - 09/2020]

      HINT: 

      The pressure values in Active Test and HYDRAULIC TEST are different from each other.

      OK

      The line pressure changes as specified when performing the Active Test.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SHIFT SOLENOID VALVE SLT. Refer to  COMPONENTS [04/2013 - ] 

    Result: 

    OK 

    See step  3

  3. INSPECT SHIFT SOLENOID VALVE S1 
    1. Remove the shift solenoid valve S1.
      GTY612437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Shift Solenoid Valve S1

      Refer to DISASSEMBLY [04/2013 - ]

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Terminal of shift solenoid valve S1 connector - Shift solenoid valve S1 body 20°C (68°F) 11 to 15 Ω
    3. Connect a positive (+) lead from the battery to the terminal of the shift solenoid valve connector, and a negative (-) lead to the shift solenoid valve body. Check that the valve moves and makes an operating sound.

      OK

      Valve moves and makes an operating sound.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SHIFT SOLENOID VALVE S1. Refer to  COMPONENTS [04/2013 - ] 

    Result: 

    OK 

    See step  4

  4. INSPECT TRANSMISSION VALVE BODY ASSEMBLY 
    1. Check the transmission valve body assembly.

      Refer to REMOVAL [04/2013 - ]

      OK

      There is no foreign matter on each valve and they operate smoothly.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPAIR OR REPLACE AUTOMATIC TRANSMISSION WITH TRANSFER ASSEMBLY. Refer to  COMPONENTS [04/2013 - 09/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY. Refer to  COMPONENTS [04/2013 - ] 

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