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Home >> Lexus >> 2017 >> IS 300 F Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 145 (Automatic Transmission System (Aa81E, For 2GR-FKS) - Diagnostic Codes (4 Of 4) & Circuit Tests) >> AUTOMATIC TRANSMISSION SYSTEM (for 2GR-FKS) >> Transmission Control Switch Circuit [10/2017 - 09/2020] >> Procedure

Transmission Control Switch Circuit [10/2017 - 09/2020]: Procedure

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  1. INSPECT TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY) 
    1. Disconnect the K80 transmission control switch (transmission floor shift assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY497942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Transmission Control Switch (Transmission Floor Shift Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 (IG) - 5 (S) Shift lever in M, "+" and "-" Below 1 Ω
      Shift lever not in M, "+" and "-" 10 kΩ or higher
      3 (SFTU) - 2 (E) Shift lever held in "+" (Up-shift) Below 1 Ω
      Shift lever in M 10 kΩ or higher
      1 (SFTD) - 2 (E) Shift lever held in "-" (Down-shift) Below 1 Ω
      Shift lever in M 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY). Refer to  COMPONENTS [04/2013 - 09/2020] 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - BATTERY, BODY GROUND) 
    1. Turn the engine switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      K80-4 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
    3. Turn the engine switch off.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K80-2 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION CONTROL SWITCH - BATTERY, BODY GROUND) 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM) 
    1. Connect the K80 transmission control switch (transmission floor shift assembly) connector.
    2. Disconnect the A106 ECM connector.
    3. Turn the engine switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A106-17 (S) - Body ground Shift lever in M, "+" and "-" 11 to 14 V
      Shift lever not in M, "+" and "-" Below 1 V
    5. Turn the engine switch off.
    6. Disconnect the spiral cable sub-assembly connector.
    7. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A106-38 (SFTU) - Body ground Shift lever held in "+" (Up-shift) Below 1 Ω
      Shift lever in M 10 kΩ or higher
      A106-37 (SFTD) - Body ground Shift lever held in "-" (Down-shift) Below 1 Ω
      Shift lever in M 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2017 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM) 

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