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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 76 (Automatic Transaxle System (K120) - Diagnostic Codes (5 Of 5) & Circuit Tests) >> K120 Continuously Variable Transaxle System >> Shift Paddle Switch Circuit [11/2022 - 09/2024] >> Procedure

Shift Paddle Switch Circuit [11/2022 - 09/2024]: Procedure

WARNING: This page is about a different variant/trim than selected.
  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 [06/2018 - 09/2024]

    Result: 

    B 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (SHIFT PADDLE SWITCH CIRCUIT) 
    1. Disconnect the C80 TCM connector.
    2. Disconnect the A47 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C80-28 (SFTU) - A47-28 (ECCS) "+" (Up shift) shift paddle switch operated and held Below 2.5 Ω
      "+" (Up shift) shift paddle switch not operated 1 MΩ or higher
      C80-27 (SFTD) - A47-28 (ECCS) "-" (Down shift) shift paddle switch operated and held Below 2.5 Ω
      "-" (Down shift) shift paddle switch not operated 1 MΩ or higher
    4. Connect the A47 ECM connector.
    5. Connect the C80 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 A47 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A47-10 (E1) - Body ground Always Below 1 Ω
    3. Connect the A47 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 A47 ECM connector.
      GTY926900Courtesy 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
      A47-28 (ECCS) - A47-10 (E1) Always Below 1 Ω
    3. Connect the A47 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 [03/2019 - 09/2024]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM REGISTRATION AND INITIALIZATION 

    for Registration: Refer to REGISTRATION [06/2018 - 09/2024]

    for Initialization: Refer to INITIALIZATION [11/2022 - 09/2024]

  6. REPLACE ECM 
    1. Replace the ECM.

      Refer to COMPONENTS [11/2022 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM INITIALIZATION 

    Refer to INITIALIZATION [11/2022 - 09/2024]

  7. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - TCM - ECM) 
    1. Disconnect the I82 spiral cable sub-assembly connector.
    2. Disconnect the C80 TCM connector.
    3. Disconnect the A47 ECM connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C80-28 (SFTU) - I82-8 (SUP) Always Below 1 Ω
      C80-27 (SFTD) - I82-1 (SDN) Always Below 1 Ω
      A47-28 (ECCS) - I82-2 (ECC) Always Below 1 Ω
      C80-28 (SFTU) or I82-8 (SUP) - Body ground Always 10 kΩ or higher
      C80-27 (SFTD) or I82-1 (SDN) - Body ground Always 10 kΩ or higher
      A47-28 (ECCS) or I82-2 (ECC) - Body ground Always 10 kΩ or higher
    5. Connect the A47 ECM connector.
    6. Connect the C80 TCM connector.
    7. Connect the I82 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 [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SPIRAL CABLE SUB-ASSEMBLY 

    Refer to COMPONENTS [06/2018 - ]

    Result: 

    OK 

    See step  9

  9. INSPECT SHIFT PADDLE SWITCH LH (NO. 1 TRANSMISSION SHIFT SWITCH ASSEMBLY) 
    1. Remove the shift paddle switch LH (No. 1 transmission shift switch assembly).
      GTY758000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Shift Paddle Switch LH (No. 1 Transmission Shift Switch Assembly))

      Refer to REMOVAL [11/2022 - ]

    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 2.5 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 2.5 Ω
      "-" (Down shift) shift paddle switch not operated 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SHIFT PADDLE SWITCH LH (NO. 1 TRANSMISSION SHIFT SWITCH ASSEMBLY) 

    Refer to COMPONENTS [06/2018 - ]

    Result: 

    OK 

    See step  10

  10. INSPECT SHIFT PADDLE SWITCH RH (NO. 2 TRANSMISSION SHIFT SWITCH ASSEMBLY) 
    1. Remove the shift paddle switch RH (No. 2 transmission shift switch assembly).
      GTY757997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Shift Paddle Switch RH (No. 2 Transmission Shift Switch Assembly))

      Refer to REMOVAL [11/2022 - ]

    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 2.5 Ω
      "+" (Up shift) shift paddle switch not operated 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SHIFT PADDLE SWITCH RH (NO. 2 TRANSMISSION SHIFT SWITCH ASSEMBLY) 

    Refer to COMPONENTS [06/2018 - ]

    Result: 

    OK 

    See step  11

  11. INSPECT NO. 1 SWITCH WIRE 
    1. Install the shift paddle switch LH (No. 1 transmission shift switch assembly) and shift paddle switch RH (No. 2 transmission shift switch assembly).
      GTY886019Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Spiral Cable Sub-assembly)

      Refer to INSTALLATION [06/2018 - ]

    2. Disconnect the z6 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
      z6-2 (SUP) - z6-3 (ECC) "+" (Up shift) shift paddle switch operated and held Below 2.5 Ω
      "+" (Up shift) shift paddle switch not operated 1 MΩ or higher
      z6-4 (SDN) - z6-3 (ECC) "-" (Down shift) shift paddle switch operated and held Below 2.5 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 [06/2018 - ]

    Result: 

    OK 

    See step  12

  12. REPLACE TCM 
    1. Replace the TCM.

      Refer to COMPONENTS [03/2019 - 09/2024]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM REGISTRATION AND INITIALIZATION 

    for Registration: Refer to REGISTRATION [06/2018 - 09/2024]

    for Initialization: Refer to INITIALIZATION [11/2022 - 09/2024]

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