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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 P0894: Transmission Component Slipping; DTC P2714: Pressure Control Solenoid "D" Performance (Shift Solenoid Valve SLT) >> 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 DTC OUTPUT (IN ADDITION TO DTC P0894 AND P2714) 
    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 P0894 is output
      • Only P0894 and P2714 are output
      		 A
      P0894, P2714 and other DTCs are output B

      HINT: 

      If any other codes besides P0894 and P2714 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 → See step   9 

    OK: Go to next step 

  3. PERFORM ACTIVE TEST USING TECHSTREAM (RUNNING TEST) 

    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. Warm up the engine.
    2. Turn the engine switch off.
    3. Connect the Techstream to the DLC3.
    4. Turn the engine switch on (IG) position.
    5. Turn the Techstream on.
    6. Select the item "Powertrain / ECT / Active Test".
    7. According to the display on tester, perform the "Active Test".

      HINT: 

      While driving, the shift position can be forcibly changed with the Techstream.

      Comparing the shift position commanded by the Active Test with the actual shift position enables you to confirm the problem. Refer to FAIL-SAFE CHART .

      Item Test Details Diagnostic Note
      Control the Shift Position [Test Details]
      Operate the shift solenoid valve and set the each shift position by yourself.
      [Vehicle Condition]
      • IDL: ON (4th, 5th and 6th)
      • Less than 50 km/h (31 mph)

      [Others]
      • Press "→" button: Shift up
      • Press "←" button: Shift down
      		 Possible to check the operation of the shift solenoid valves.

      HINT: 

      • This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
      • The 4th to 5th and 5th to 6th up-shiftings must be performed with the accelerator pedal released.
      • The 6th to 5th and 5th to 4th down-shiftings must be performed with the accelerator pedal released.
      • Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively.
      • The shift position commanded by the ECM is shown in the Data List (Shift Status) display on the Techstream.
      • Gear positions in the event of a solenoid valve mechanical problem:
        ECM gear shift command 1st 2nd 3rd 4th 5th 6th Proceed to
        Actual gear position under malfunction Shift solenoid S1 Stuck ON*1 2nd 2nd 3rd 4th 5th 6th A
        Stuck OFF 1st 1st 3rd 4th 5th N*2
        Shift solenoid S2 Stuck ON 1st 2nd 2nd 4th 6th 6th B
        Stuck OFF 3rd 3rd 3rd 4th 5th 5th
        Shift solenoid S3 Stuck ON 1st 2nd 3rd 3rd N*2 N*2 C
        Stuck OFF 3rd 4th 4th 4th 5th 6th
        Shift solenoid S4 Stuck ON*3 1st 2nd 3rd 4th 5th 6th D
        Stuck OFF 1st 2nd 3rd 4th 4th 4th

      HINT: 

      • *1: When shift solenoid S1 is stuck ON, the vehicle cannot drive in reverse.
      • *2: Neutral
      • *3: When shift solenoid S4 is stuck ON, gear shifting is normal.

      OK

      Gear position changes in accordance with the tester command.

    D → See step   7 

    C → See step   6 

    B → See step   5 

    OK → See step   9 

    A: Go to next step 

  4. INSPECT SHIFT SOLENOID VALVE S1 
    1. Remove the shift solenoid valve S1.
      Fig 2: Inspecting Shift Solenoid Valve S1
      GTY107076Courtesy 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 (S1) - Solenoid Body (S1) 11 to 15 Ω
    3. Connect positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

      OK

      The solenoid makes an operating sound.

    OK → See step   10 

    NG → REPLACE SHIFT SOLENOID VALVE S1 

  5. INSPECT SHIFT SOLENOID VALVE S2 
    1. Remove the shift solenoid valve S2.
      Fig 3: Inspecting Shift Solenoid Valve S2
      GTY103223Courtesy 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 (S2) - Solenoid Body (S2) 11 to 15 Ω
    3. Connect positive (+) lead to the terminal of solenoid connector, negative (-) lead to the solenoid body.

      OK

      The solenoid makes an operating sound.

    OK → See step   10 

    NG → REPLACE SHIFT SOLENOID VALVE S2 

  6. INSPECT SHIFT SOLENOID VALVE S3 
    1. Remove the shift solenoid valve S3.
      Fig 4: Inspecting Shift Solenoid Valve S3
      GTY101005Courtesy 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.

    OK → See step   10 

    NG → REPLACE SHIFT SOLENOID VALVE S3 

  7. INSPECT SHIFT SOLENOID VALVE S4 
    1. Remove the shift solenoid valve S4.
      Fig 5: Inspecting Shift Solenoid Valve S4
      GTY129372Courtesy 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 (S4) - Solenoid Body (S4) 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 S4 

    OK: Go to next step 

  8. INSPECT SHIFT SOLENOID VALVE SL2 
    1. Remove the shift solenoid valve SL2.
      Fig 6: Identifying Shift Solenoid Valve SL2
      GTY108550Courtesy 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)
      1 - 2 5.0 to 5.6 Ω
    3. Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

      OK

      The solenoid makes an operating sound.

    OK → See step   10 

    NG → REPLACE SHIFT SOLENOID VALVE SL2 

  9. INSPECT SHIFT SOLENOID VALVE SLT 
    1. Remove the shift solenoid valve SLT.
      Fig 7: Inspecting Shift Solenoid Valve SLT
      GTY100783Courtesy 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)
      1 - 2 5.0 to 5.6 Ω
    3. Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

      OK

      The solenoid makes an operating sound.

    NG → REPLACE SHIFT SOLENOID VALVE SLT 

    OK: Go to next step 

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

      OK

      There are no foreign objects on each valve.

    NG → REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY 

    OK: Go to next step 

  11. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY 
    1. Check the torque converter clutch assembly. Refer to INSPECTION - Step 1 .

      OK

      The torque converter clutch operates normally.

    NG → REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY 

    OK → REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY 

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