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Home >> Lexus >> 2010 >> IS 350 >> Repair and Diagnosis >> External Pages >> Different car >> Section 31 (Automatic Transmission (A760H) (Diagnostic Codes (P0500-U0100) & Circuit Tests)) >> Automatic Transmission System >> DTC P0761: Shift Solenoid "C" Performance (Shift Solenoid Valve S3) >> Inspection Procedure >> Procedure

Inspection Procedure: Procedure

WARNING: This page is about a different car, the 2010 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0761) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG) position and push the Techstream main switch ON.
    3. When you use Techstream:

      Select the item "Powertrain / ECT / Trouble Codes".

    4. Read the DTCs using the Techstream.

      Result

      Display (DTC output) Proceed to
      Only "P0761" is output A
      "P0761" and other DTCs B

      HINT: 

      If any other codes besides "P0761" are output, perform troubleshooting for those DTCs first.

    B → GO TO DTC CHART 

    A: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM (SHIFT SOLENOID VALVE SLT) 
    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 SST hose from interfering with the exhaust pipe.
    • This check must be conducted after checking and adjusting engine.
    • Perform under condition that A/C is OFF.

    HINT: 

    Using the Techstream to perform Active Test 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 Test early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Test.

    1. Turn the engine switch off.
    2. Lift the vehicle up.
    3. Remove the test plug on the transmission case center right side and connect SST.
      Fig 1: Measuring Line Pressure With SST
      GTY102089Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09992-00095 
        • 09992-00231
        • 09992-00271
    4. Lower the vehicle.
    5. Fully apply the parking brake and chock the 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. Select the item "Powertrain / ECT / Active Test".
    12. According to the display on tester, perform the "Active Test".
    13. Measure the line pressure with SST.
      Item Test Details
      Activate the Solenoid (SLT)* [Test Details]
      Operate the shift solenoid SLT and raise the line pressure.
      [Vehicle Condition]
      • Vehicle Stopped.
      • IDL: ON

      HINT: 
      OFF: Line pressure up (When the active test of "Activate the Solenoid (SLT)" is performed, the ECM commands the SLT solenoid to turn off).
      ON: No action (normal operation)

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

      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.

    NG → REPLACE SHIFT SOLENOID VALVE SLT 

    OK: Go to next step 

  3. INSPECT SHIFT SOLENOID VALVE S3 
    1. Remove the shift solenoid valve S3.
      Fig 2: Inspecting Shift Solenoid Valve S3
      GTY136112Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Specified Condition
      20°C (68°F)
      Solenoid Connector (S3) - Solenoid Body (S3) 11 to 15 Ω
    3. Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

      OK

      The solenoid makes an operating sound.

    NG → REPLACE SHIFT SOLENOID VALVE S3 

    OK: Go to next step 

  4. INSPECT TRANSMISSION VALVE BODY ASSEMBLY 

    OK

    There are no foreign objects on each valve.

    NG → REPLACE TRANSMISSION VALVE BODY ASSEMBLY 

    OK → REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY 

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