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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 60 (Hybrid Control System (AWD) - Circuit Tests (2 Of 2)) >> HYBRID CONTROL SYSTEM (for AWD) >> Drive Mode Select Switch Circuit [12/2019 - 11/2023] >> Procedure

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

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE USING GTS (CAN BUS CHECK) 

    See step  2

    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

    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  2

  2. CHECK DTC OUTPUT (HEALTH CHECK) 

    See step  3

    Result

    Result Proceed to
    No DTCs are output A
    DTCs are output B

    Result: 

    B 

    GO TO DTC CHART 

    Result: 

    A 

    See step  3

  3. CHECK DRIVE MODE STATUS 
    1. Turn the ignition switch to ON.
    2. Operate the drive mode select switch (No. 1 pattern select switch assembly) to change the drive mode.
    3. Check that the drive mode indicator is displayed on the multi-information display and changes according to the selected drive mode.

      Result

      Result Proceed to
      Display changes according to drive mode select switch operation A
      Display does not change according to drive mode select switch operation B
    4. Turn the ignition switch off.

    Result: 

    A 

    GO TO PROBLEM SYMPTOMS TABLE 

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

    Result: 

    B 

    See step  4

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

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Drive Mode Switch-
      Drive Mode Switch+

      Result

      Result Proceed to
      GTS display changes according to drive mode select switch operation A
      Other than above B
    2. Turn the ignition switch off.

    Result: 

    A 

    CHECK METER / GAUGE SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

    Result: 

    B 

    See step  5

  5. INSPECT DRIVE MODE SELECT SWITCH (NO. 1 PATTERN SELECT SWITCH ASSEMBLY) 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE DRIVE MODE SELECT SWITCH (NO. 1 PATTERN SELECT SWITCH ASSEMBLY) 

    Refer to REMOVAL [12/2019 - ]

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH - BODY GROUND) 
    1. Disconnect the P3 drive mode select switch (No. 1 pattern select switch assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY902322Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Drive Mode Select Switch (No. 1 Pattern Select Switch Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      P3-5 (E) - Body ground Always Below 1 Ω
    3. Reconnect the P3 drive mode select switch (No. 1 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 - DRIVE MODE SELECT SWITCH) 
    1. Disconnect the H67 hybrid vehicle control ECU connector.
    2. Disconnect the P3 drive mode select switch (No. 1 pattern select switch assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY840089Courtesy 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 Drive Mode Select Switch (No. 1 Pattern Select Switch Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      H67-37 (DMS-) - P3-6 (E) Always Below 1 Ω
      H67-38 (DMS+) - P3-7 (SEL) Always Below 1 Ω
      H67-37 (DMS-) or P3-6 (E) - Body ground Always 10 kΩ or higher
      H67-38 (DMS+) or P3-7 (SEL) - Body ground Always 10 kΩ or higher
    4. Reconnect the P3 drive mode select switch (No. 1 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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