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Shift Paddle Switch Circuit [08/2023 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE USING GTS (SPORTS SHIFT UP SIGNAL, SPORTS SHIFT DOWN SIGNAL) 
    1. Read the values displayed on the GTS.

      Powertrain > Hybrid Control > Data List 

      Tester Display Measurement Item Range Normal Condition
      Sports Shift UP Signal Sport shift up switch status ON or OFF Shift paddle switch RH (+) operated: ON
      Shift paddle switch RH (+) not operated: OFF
      Sports Shift DOWN Signal Sport shift down switch status ON or OFF Shift paddle switch LH (-) operated: ON
      Shift paddle switch LH (-) not operated: OFF

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Sports Shift UP Signal
      Sports Shift DOWN Signal

      Result

      Result Proceed to
      The tester display changes according to the shift paddle switch (transmission shift switch assembly) operation. A
      The tester display does not change according to the shift paddle switch (transmission shift switch assembly) operation. B
    2. Turn the ignition switch off.

    Result: 

    A 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [08/2023 - ] 

    Result: 

    B 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (SHIFT PADDLE SWITCH CIRCUIT) 
    1. Disconnect the hybrid vehicle control ECU connector.
    2. Measure the resistance according to the value(s) in the table below when the shift paddle switch (transmission shift switch assembly) is moved to each position.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C59-31 (SFTU) - Body ground Shift paddle switch RH (+) operated 2.5 Ω or less
      C59-18 (SFTD) - Body ground Shift paddle switch LH (-) operated 2.5 Ω or less
      C59-31 (SFTU) - Body ground Shift paddle switch RH (+) not operated 1 MΩ or higher
      C59-18 (SFTD) - Body ground Shift paddle switch LH (-) not operated 1 MΩ or higher
      GTY1203993Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)
    3. Reconnect the hybrid vehicle control ECU connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND) 
    1. Disconnect the spiral cable sub-assembly connector.
    2. Disconnect the hybrid vehicle control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      10 kΩ or higher

      Tester Connection Condition Specified Condition
      C165-8 (SUP) - C59-31 (SFTU) Always Below 1 Ω
      C165-1 (SDN) - C59-18 (SFTD) Always Below 1 Ω
      C165-2 (ECC) -C59-43 (CCSG) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      C165-8 (SUP) or C59-31 (SFTU) - Body ground Always 10 kΩ or higher
      C165-1 (SDN) or C59-18 (SFTD) - Body ground Always 10 kΩ or higher
    4. Reconnect the hybrid vehicle control ECU connector.
    5. Reconnect the spiral cable sub-assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY 

    Refer to INSPECTION [10/2022 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    OK 

    See step  5

  5. INSPECT SHIFT PADDLE SWITCH (TRANSMISSION SHIFT SWITCH ASSEMBLY) LH 

    Refer to INSPECTION [10/2022 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE SHIFT PADDLE SWITCH (TRANSMISSION SHIFT SWITCH ASSEMBLY) LH. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    OK 

    See step  6

  6. INSPECT SHIFT PADDLE SWITCH (TRANSMISSION SHIFT SWITCH ASSEMBLY) RH 

    Refer to INSPECTION [10/2022 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE SHIFT PADDLE SWITCH (TRANSMISSION SHIFT SWITCH ASSEMBLY) RH. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    OK 

    See step  7

  7. INSPECT NO. 1 SWITCH WIRE 
    1. Disconnect the No. 1 switch wire connector.
    2. Measure the resistance according to the value(s) in the table below when the shift paddle switch (transmission shift switch assembly) is moved to each position.
      GTY1122704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (No. 1 Switch Wire)

      Standard Resistance

      Tester Connection Condition Specified Condition
      z7-4 (SDN) - z7-3 (ECC) Shift paddle switch LH (-) operated Below 2.5 Ω
      z7-2 (SUP) - z7-3 (ECC) Shift paddle switch RH (+) operated Below 2.5 Ω
      z7-4 (SDN) - z7-3 (ECC) Shift paddle switch LH (-) not operated 1 MΩ or higher
      z7-2 (SUP) - z7-3 (ECC) Shift paddle switch RH (+) not operated 1 MΩ or higher
    3. Reconnect the No. 1 switch wire connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [08/2023 - ] 

    Result: 

    NG 

    REPLACE NO. 1 SWITCH WIRE. Refer to  REMOVAL [08/2023 - ] 

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