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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) >> Pattern Select Switch EV Mode Circuit [12/2019 - 11/2023] >> Procedure

Pattern Select Switch EV Mode Circuit [12/2019 - 11/2023]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. ASK ABOUT VEHICLE CONDITION 
    1. Check if a buzzer sounded and a message was displayed on the multi-information display when attempting to enter EV drive mode.

      Result

      Result Proceed to
      No buzzer sounded and no message was displayed on multi-information display A
      A buzzer sounded and a message was displayed on multi-information display B

      HINT: 

      If a buzzer sounds or a message is displayed on the multi-information display, one or more of the EV drive mode entry conditions have not been met.

    Result: 

    B 

    END 

    Result: 

    A 

    See step  2

  2. READ VALUE USING GTS (CAN BUS CHECK) 
    1. Perform the CAN Bus Check using the GTS.

      CAN Bus Check 

      Result

      Result Proceed to
      All of the ECUs and sensors that are currently connected to the CAN communication system are displayed. A
      None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed. B
    2. Turn the ignition switch off.

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2021 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]

    Result: 

    A 

    See step  3

  3. CHECK DTC OUTPUT (HEALTH CHECK) 
    1. Perform the Health Check using the GTS.
    2. Check for DTCs.

      Result

      Result Proceed to
      No DTCs are output A
      DTCs are output B
    3. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 09/2020]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2020 - 10/2021]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023] 

    Result: 

    A 

    See step  4

  4. READ VALUE USING GTS (EV MODE, EV MODE SWITCH) 
    1. Read the Data List using the GTS.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      EV Mode
      EV Mode Switch

      Result

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

    Result: 

    A 

    GO TO PROBLEM SYMPTOMS TABLES 

    Refer to PROBLEM SYMPTOMS TABLE [12/2019 - 10/2022] , or refer to PROBLEM SYMPTOMS TABLE [10/2022 - 11/2023]

    Result: 

    B 

    See step  5

  5. INSPECT EV DRIVE MODE SWITCH (PATTERN SELECT SWITCH ASSEMBLY) 

    Refer to PROCEDURE - Step 1

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE EV DRIVE MODE SWITCH (PATTERN SELECT SWITCH ASSEMBLY) 

    Refer to REMOVAL [12/2019 - ]

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (EV DRIVE MODE SWITCH - BODY GROUND) 
    1. Disconnect the P9 EV drive mode switch (pattern select switch assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY890733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to EV Drive Mode Switch (Pattern Select Switch Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      P9-2 (E) - Body ground Always Below 1 Ω
    3. Reconnect the P9 EV drive mode switch (pattern select switch assembly) connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - EV DRIVE MODE SWITCH) 
    1. Disconnect the H67 hybrid vehicle control ECU connector.
    2. Disconnect the P9 EV drive mode switch (pattern select switch assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY856507Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)
      *b Front view of wire harness connector
      (to EV Drive Mode Switch (Pattern Select Switch Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      H67-33 (EVSW) - P9-5 (S) Always Below 1 Ω
      H67-33 (EVSW) or P9-5 (S) - Body ground Always 10 kΩ or higher
    4. Reconnect the P9 EV drive mode switch (pattern select switch assembly) connector.
    5. 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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