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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 61 (Hybrid Control System (2WD) - Diagnostic Codes (7 Of 7) & Circuit Tests) >> HYBRID CONTROL SYSTEM (for 2WD) >> Transmission Control Switch Circuit [12/2019 - 11/2023] >> Procedure

Transmission Control Switch Circuit [12/2019 - 11/2023]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE USING GTS (SPORTS SHIFT POSITION) 
    1. Read the Data List using the GTS.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Sports Shift Position

      Result

      Result Proceed to
      GTS display changes according to shift lever operation A
      GTS display does not change according to shift lever operation B
    2. Turn the ignition switch off.

    Result: 

    B 

    See step  4

    Result: 

    A 

    See step  2

  2. READ VALUE USING GTS (SPORTS SHIFT UP SIGNAL, SPORTS SHIFT DOWN SIGNAL) 
    1. Read the Data List using the GTS.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Sports Shift UP Signal
      Sports Shift DOWN Signal

      Result

      Result Proceed to
      GTS display changes according to transmission control switch operation A
      GTS display does not change according to transmission control switch operation B
    2. Turn the ignition switch off.

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  3

  3. CHECK FOR INTERMITTENT PROBLEMS 

    Refer to CHECK FOR INTERMITTENT PROBLEMS [12/2019 - 11/2023]

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

    Result: 

    NG 

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the H29 transmission control switch (shift lock control unit assembly) connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H29-4 (IG) - Body ground Ignition switch ON 11 to 14 V
      GTY891165Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Transmission Control Switch (Shift Lock Control Unit Assembly))
    4. Turn the ignition switch off.
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H29-4 (IG) - Body ground Ignition switch off Below 1 V
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H29-2 (E) - Body ground Ignition switch off Below 1 Ω
    7. Reconnect the H29 transmission control switch (shift lock control unit assembly) connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CHECK POWER SOURCE CIRCUIT 

    Result: 

    OK 

    See step  5

  5. INSPECT TRANSMISSION CONTROL SWITCH (SHIFT LOCK CONTROL UNIT ASSEMBLY) 

    Refer to PROCEDURE - Step 2

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION CONTROL SWITCH) 
    1. Disconnect the H67 hybrid vehicle control ECU connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
      GTY884959Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)

      Standard Voltage

      Tester Connection Condition Specified Condition
      H67-25 (M) - Body ground Ignition switch ON
      Shift lever in S, "+" or "-"      		 11 to 14 V
      Ignition switch ON
      Except shift lever in S, "+" and "-"      		 Below 1 V
      NOTE:

      If the ignition switch is turned to ON with the hybrid vehicle control ECU connector disconnected, other DTCs will be stored. After performing the inspection, clear the DTCs.

    4. Turn the ignition switch off.
    5. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H67-24 (SFTU) - Body ground Shift lever held in "+" Below 1 Ω
      H67-24 (SFTU) - Body ground Shift lever in S 10 kΩ or higher
      H67-11 (SFTD) - Body ground Shift lever held in "-" Below 1 Ω
      H67-11 (SFTD) - Body ground Shift lever in S 10 kΩ or higher
    6. Reconnect the H67 hybrid vehicle control ECU connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  7. INSPECT TRANSMISSION CONTROL SWITCH (SHIFT LOCK CONTROL UNIT ASSEMBLY) 

    Refer to PROCEDURE - Step 2

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - HYBRID VEHICLE CONTROL ECU) 
    1. Disconnect the H67 hybrid vehicle control ECU connector.
    2. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H67-24 (SFTU) - Body ground Shift lever held in "+" Below 1 Ω
      H67-24 (SFTU) - Body ground Shift lever in S 10 kΩ or higher
      H67-11 (SFTD) - Body ground Shift lever held in "-" Below 1 Ω
      H67-11 (SFTD) - Body ground Shift lever in S 10 kΩ or higher
      GTY936465Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)
    3. Reconnect the H67 hybrid vehicle control ECU connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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