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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 22 (Automatic Transaxle) >> Automatic Transmission System >> DTC P0741: Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve SL); DTC P2757: Torque Converter Clutch Pressure Control Solenoid Performance (Shift Solenoid Valve SLU) >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (IN ADDITION TO DTC P0741 and P2757) 
    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 / ECT / Trouble Codes
    5. Read the DTCs using the Techstream

      Result 

      RESULT REFERENCE

      Display (DTC Output) Proceed to
      Only P0741 and P2757 are output A
      P0741, P2757 and other DTCs are output B

      HINT

      If a solenoid related or oil pressure switch related DTC is output, troubleshoot those DTCs first

    B: GO TO DTC CHART  (See DIAGNOSTIC TROUBLE CODE CHART  )

    A: Go to next Step 

  2. INSPECT SHIFT SOLENOID VALVE SL AND SHIFT SOLENOID VALVE SLU 
    1. Check the shift solenoid valve SL
      1. Remove the shift solenoid valve SL (See DISASSEMBLY  ).
      2. Measure the resistance according to the value (s) in the table below

        Standard Resistance 

        STANDARD RESISTANCE SPECIFICATION

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

        OK: Valve moves and makes an operating sound. 

        Fig 1: Inspecting Shift Solenoid Valve SL
        G05750724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the shift solenoid valve SLU
      1. Remove the shift solenoid valve SLU (See DISASSEMBLY  )
      2. Measure the resistance according to the value (s) in the table below.

        Standard Resistance 

        STANDARD RESISTANCE SPECIFICATION

        Tester Connection Condition Specified Condition
        Terminal 1 of the shift solenoid valve SLU - Terminal 2 20°C (68°F) 5.0 to 5.6 Ω
      3. Connect a battery positive (+) lead with a 21 W bulb to terminal 2 and a negative (-) lead to terminal 1 of the solenoid valve connector Then check that the valve moves and makes an operating sound

        OK: Valve moves and makes an operating sound. 

        Result 

        RESULT REFERENCE

        Shift Solenoid Valve Condition Proceed to
        Shift solenoid valve SL and SLU are OK A
        Shift solenoid valve SL is NG B
        Shift solenoid valve SLU is NG C
      Fig 2: Inspecting Shift Solenoid Valve SLU
      G04948325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B: REPLACE SHIFT SOLENOID VALVE SL  (See DISASSEMBLY  )

    C: REPLACE SHIFT SOLENOID VALVE SLU  (See DISASSEMBLY  )

    A: Go to next Step 

  3. INSPECT TRANSMISSION VALVE BODY ASSEMBLY 
    1. Check the transmission valve body assembly (See DISASSEMBLY  )

      OK: There are no foreign objects on any valve. 

    NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY  (See REMOVAL  )

    OK: Go to next Step 

  4. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY 
    1. Check the torque converter clutch assembly (See TORQUE CONVERTER CLUTCH AND DRIVE PLATE  )

      OK: The torque converter clutch operates normally. 

    NG: REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY 

    OK: REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY  (See REMOVAL  )

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