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Home >> Lexus >> 2021 >> UX 200 Base >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Continuously Variable Transaxle (CVT) System (K120) (Diagnostic Codes) (2 Of 2) & Circuit Tests) >> Continuously Variable Transaxle System >> Shift Paddle Switch Circuit [10/2018 - 07/2022] >> Procedure

Shift Paddle Switch Circuit [10/2018 - 07/2022]: Procedure

  1. READ VALUE USING TECHSTREAM (SPORT SHIFT SWITCH STATUS) 
    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 / Data List.
    5. According to the display on the Techstream, read the Data List.

      Powertrain > Transmission > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Sport Shift Up SW Sport shift up switch status ON or OFF
      • ON: Shift lever held in "+" or "+" shift paddle switch operated
      • OFF: Shift lever not held in "+" and "+" shift paddle switch released
      		 -
      Sport Shift Down SW Sport shift down switch status ON or OFF
      • ON: Shift lever held in "-" or "-" shift paddle switch operated
      • OFF: Shift lever not held in "-" and "-" shift paddle switch released
      		 -

      Powertrain > Transmission > Data List 

      Tester Display
      Sport Shift Up SW
      Sport Shift Down SW

      Result

      Result Proceed to
      Data List values are normal A
      Data List values are not normal B

    Result: 

    A 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [10/2018 - 07/2022] 

    Result: 

    B 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (SHIFT PADDLE SWITCH CIRCUIT) 
    1. Disconnect the C36 TCM connector.
    2. Disconnect the A36 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C36-14 (SFTU) - A36-28 (ECCS) "+" (Up shift) shift paddle switch operated and held Below 13 Ω
      "+" (Up shift) shift paddle switch not operated 1 MΩ or higher
      C36-13 (SFTD) - A36-28 (ECCS) "-" (Down shift) shift paddle switch operated and held Below 13 Ω
      "-" (Down shift) shift paddle switch not operated 1 MΩ or higher
    4. Connect the A36 ECM connector.
    5. Connect the C36 TCM connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) 
    1. Disconnect the A36 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A36-10 (E1) - Body ground Always Below 1 Ω
    3. Connect the A36 ECM connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BODY GROUND) 

    Result: 

    OK 

    See step  4

  4. CHECK ECM (ECM TERMINALS) 
    1. Disconnect the A36 ECM connector.
      GTY778686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (ECM)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A36-28 (ECCS) - A36-10 (E1) Always Below 1 Ω
    3. Connect the A36 ECM connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  6

    Result: 

    OK 

    See step  5

  5. REPLACE TCM 
    1. Replace the TCM.

      Refer to COMPONENTS [10/2018 - 07/2022]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM REGISTRATION AND INITIALIZATION 

    for Registration: Refer to REGISTRATION [10/2018 - 07/2022]

    for Initialization: Refer to INITIALIZATION [10/2018 - 07/2022]

  6. REPLACE ECM 
    1. Replace the ECM.

      Refer to COMPONENTS [10/2018 - 07/2022]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM INITIALIZATION. Refer to  INITIALIZATION [10/2018 - 07/2022] 

  7. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - TCM - ECM) 
    1. Disconnect the F20 spiral cable sub-assembly connector.
    2. Disconnect the C36 TCM connector.
    3. Disconnect the A36 ECM connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C36-14 (SFTU) - F20-8 (SUP) Always Below 1 Ω
      C36-13 (SFTD) - F20-1 (SDN) Always Below 1 Ω
      A36-28 (ECCS) - F20-2 (ECC) Always Below 1 Ω
      C36-14 (SFTU) or F20-8 (SUP) - Body ground Always 10 kΩ or higher
      C36-13 (SFTD) or F20-1 (SDN) - Body ground Always 10 kΩ or higher
      A36-28 (ECCS) or F20-2 (ECC) - Body ground Always 10 kΩ or higher
    5. Connect the A36 ECM connector.
    6. Connect the C36 TCM connector.
    7. Connect the F20 spiral cable sub-assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - TCM - ECM) 

    Result: 

    OK 

    See step  8

  8. INSPECT SPIRAL CABLE SUB-ASSEMBLY 
    1. Inspect the spiral cable sub-assembly.

      Refer to INSPECTION [10/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  COMPONENTS [10/2018 - ] 

    Result: 

    OK 

    See step  9

  9. INSPECT SHIFT PADDLE SWITCH LH (TRANSMISSION SHIFT SWITCH ASSEMBLY) 
    1. Remove the shift paddle switch LH (transmission shift switch assembly).
      GTY758000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Shift Paddle Switch LH (Transmission Shift Switch Assembly))

      Refer to REMOVAL [10/2018 - 07/2022]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      A-1 (SDN) - A-2 (ECC) "-" (Down shift) shift paddle switch operated and held Below 13 Ω
      "-" (Down shift) shift paddle switch not operated 1 MΩ or higher
      A-1 (SDN) - A-3 (ECC1) "-" (Down shift) shift paddle switch operated and held Below 13 Ω
      "-" (Down shift) shift paddle switch not operated 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SHIFT PADDLE SWITCH LH (TRANSMISSION SHIFT SWITCH ASSEMBLY). Refer to  COMPONENTS [10/2018 - 07/2022] 

    Result: 

    OK 

    See step  10

  10. INSPECT SHIFT PADDLE SWITCH RH (TRANSMISSION SHIFT SWITCH ASSEMBLY) 
    1. Remove the shift paddle switch RH (transmission shift switch assembly).
      GTY757997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Shift Paddle Switch RH (Transmission Shift Switch Assembly))

      Refer to REMOVAL [10/2018 - 07/2022]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      B-1 (SUP) - B-2 (ECC) "+" (Up shift) shift paddle switch operated and held Below 13 Ω
      "+" (Up shift) shift paddle switch not operated 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SHIFT PADDLE SWITCH RH (TRANSMISSION SHIFT SWITCH ASSEMBLY). Refer to  COMPONENTS [10/2018 - 07/2022] 

    Result: 

    OK 

    See step  11

  11. INSPECT NO. 1 SWITCH WIRE 
    1. Install the shift paddle switch LH (transmission shift switch assembly) and shift paddle switch RH (transmission shift switch assembly).
      GTY781263Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Spiral Cable Sub-assembly)

      Refer to INSTALLATION [10/2018 - 07/2022]

    2. Disconnect the z3 No. 1 switch wire connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      z3-2 (SUP) - z3-3 (ECC) "+" (Up shift) shift paddle switch operated and held Below 13 Ω
      "+" (Up shift) shift paddle switch not operated 1 MΩ or higher
      z3-4 (SDN) - z3-3 (ECC) "-" (Down shift) shift paddle switch operated and held Below 13 Ω
      "-" (Down shift) shift paddle switch not operated 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE NO. 1 SWITCH WIRE. Refer to  COMPONENTS [10/2018 - 07/2022] 

    Result: 

    OK 

    See step  12

  12. REPLACE TCM 
    1. Replace the TCM.

      Refer to COMPONENTS [10/2018 - 07/2022]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM REGISTRATION AND INITIALIZATION 

    for Registration: Refer to REGISTRATION [10/2018 - 07/2022]

    for Initialization: Refer to INITIALIZATION [10/2018 - 07/2022]

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