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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 68 (Hybrid Control System (2WD) - Diagnostic Codes (1 Of 7)) >> HYBRID CONTROL SYSTEM (for 2WD) >> DTC P0A2A-11: Drive Motor "A" Temperature Sensor Circuit Short to Ground; DTC P0A2A-15: Drive Motor "A" Temperature Sensor Circuit Short to Auxiliary Battery or Open [12/2019 - 11/2023] >> Procedure

DTC P0A2A-11: Drive Motor "A" Temperature Sensor Circuit Short to Ground; DTC P0A2A-15: Drive Motor "A" Temperature Sensor Circuit Short to Auxiliary Battery or Open [12/2019 - 11/2023]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) 
    1. Check the connection condition of the hybrid vehicle control ECU connectors and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2019 - ]

      GTY869968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      - The connector is connected securely.

      - The terminals are not deformed and are connected securely.

      - No water or foreign matter in the connector.

      Result

      Result Proceed to
      OK A
      NG (The connector is not connected securely.) B
      NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  2

  2. CHECK CONNECTOR CONNECTION CONDITION (INTERMEDIATE CONNECTOR) 
    1. Check that the intermediate connector which connects the motor temperature sensor to the hybrid vehicle control ECU is securely connected with no deformation, and that there is no contamination by water or foreign matter.

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2019 - ]

      HINT: 

      For vehicles in which the intermediate connector is inside the relay block, check for signs of water intrusion inside the relay block.

      OK

      - The connector is connected securely.

      - The terminals are not deformed and are connected securely.

      - No water or foreign matter in the connectors.

      Result

      Result Proceed to
      OK A
      NG (The connector is not connected securely.) B
      NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  3

  3. CHECK CONNECTOR CONNECTION CONDITION (MOTOR TEMPERATURE SENSOR CONNECTOR) 
    1. Check the connection condition of the motor temperature sensor connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2019 - ]

      OK

      - The connector is connected securely.

      - The terminals are not deformed and are connected securely.

      - No water or foreign matter in the connector.

      GTY855341Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result

      Result Proceed to
      OK A
      NG (The connector is not connected securely.) B
      NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  4

  4. READ VALUE USING GTS (MOTOR TEMPERATURE) 
    1. Read the Data List.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Motor Temperature

      Result

      Result  Proceed to
      -40°C (-40°F) A
      215°C (419°F) B
      Same as actual temperature C
    2. Turn the ignition switch off.

    Result: 

    B 

    See step  7

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  5

  5. INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR TEMPERATURE SENSOR) 
    1. Disconnect the C62 motor temperature sensor connector.
      GTY855341Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      GTY912215Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Motor Temperature Sensor (Hybrid Vehicle Transaxle Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      C62-1 (MMT) - C62-2 (MMTG) Ignition switch off 0.3 to 2100 kΩ

      HINT: 

      Terminal No. 3 on the component side connector is empty.

    3. Reconnect the C62 motor temperature sensor connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

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

    Result: 

    OK 

    See step  6

  6. INSPECT HYBRID VEHICLE CONTROL ECU 
    1. Connect terminals 46 (MMT) and 45 (MMTG) of the A31 hybrid vehicle control ECU connector.
      GTY894642Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU)      		 - -
    2. Read the Data List.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Motor Temperature

      OK

      GTS Display Condition Specified Condition
      Motor Temperature Terminals A31-46 (MMT) and A31-45 (MMTG) connected
      Ignition switch ON      		 215°C (419°F)

      Result

      Proceed to
      OK
      NG
    3. Turn the ignition switch off.

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MOTOR TEMPERATURE SENSOR - HYBRID VEHICLE CONTROL ECU) 

    Result: 

    NG 

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

  7. INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR TEMPERATURE SENSOR) 
    1. Disconnect the C62 motor temperature sensor connector.
      GTY855341Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      GTY912215Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Motor Temperature Sensor (Hybrid Vehicle Transaxle Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      C62-1 (MMT) - C62-2 (MMTG) Ignition switch off 0.3 to 2100 kΩ

      HINT: 

      Terminal No. 3 on the component side connector is empty.

    3. Reconnect the C62 motor temperature sensor connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

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

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (MOTOR TEMPERATURE SENSOR - HYBRID VEHICLE CONTROL ECU) 
    1. Disconnect the C62 motor temperature sensor connector.
    2. Disconnect the A31 hybrid vehicle control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      C62-1 (MMT) - A31-46 (MMT) Ignition switch off Below 1 Ω
      C62-2 (MMTG) - A31-45 (MMTG) Ignition switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      C62-1 (MMT) or A31-46 (MMT) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      C62-2 (MMTG) or A31-45 (MMTG) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      GTY854169Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Motor Temperature Sensor)
      *b Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)
    4. Reconnect the A31 hybrid vehicle control ECU connector.
    5. Reconnect the C62 motor temperature sensor 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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