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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 67 (Hybrid Control System (AWD) - Diagnostic Codes (1 Of 6)) >> HYBRID CONTROL SYSTEM (for AWD) >> DTC P0A30-11: Drive Motor "B" Temperature Sensor Circuit Short to Ground; DTC P0A30-15: Drive Motor "B" Temperature Sensor Circuit Short to Battery or Open [12/2019 - 11/2023] >> Procedure

DTC P0A30-11: Drive Motor "B" Temperature Sensor Circuit Short to Ground; DTC P0A30-15: Drive Motor "B" Temperature Sensor Circuit Short to 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) 

    See step  1

    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 (NO. 2 FLOOR WIRE CONNECTOR) 
    1. Check the connection condition of the No. 2 floor wire connector and the contact pressure of each terminal. Check the terminal 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 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 (FRAME WIRE CONNECTOR) 
    1. Check the connection condition of the frame wire 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.

      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 (REAR MOTOR TEMPERATURE) 
    1. Read the Data List.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Rear 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  9

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  5

  5. READ VALUE USING GTS (CHECK WIRE HARNESS OPEN CIRCUIT) 
    1. Disconnect the NM1 frame wire connector.
    2. Connect terminals 6 (RMTG) and 3 (RMT) of the NM1 frame wire connector (hybrid vehicle control ECU side).
      GTY899377Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of frame wire connector
      (Hybrid Vehicle Control ECU Side)
    3. Read the Data List.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Rear Motor Temperature

      OK

      Tester Display  Condition Specified Condition
      Rear Motor Temperature Terminals NM1-6 (RMTG) and NM1-3 (RMT) connected
      Ignition switch ON      		 215°C (419°F)
    4. Turn the ignition switch off.
    5. Reconnect the NM1 frame wire connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  8

    Result: 

    OK 

    See step  6

  6. CHECK CONNECTOR CONNECTION CONDITION (REAR MOTOR TEMPERATURE SENSOR CONNECTOR) 
    1. Remove the rear suspension member sub-assembly.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

    2. Check the connection condition of the rear 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.
      GTY851143Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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.

      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
    3. Reinstall the rear suspension member sub-assembly.

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  7

  7. INSPECT REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (REAR MOTOR TEMPERATURE SENSOR) 
    1. Remove the rear suspension member sub-assembly.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

    2. Disconnect the N5 rear motor temperature sensor connector.
      GTY851143Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection  Condition Specified Condition
      N5-1 (RMTG) - N5-2 (RMT) Ignition switch off 0.4 to 2100 kΩ
    4. Reconnect the N5 rear motor temperature sensor connector.
      GTY854726Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Rear Motor Temperature Sensor (Rear Traction Motor with Transaxle Assembly))
    5. Reinstall the rear suspension member sub-assembly.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - NO. 2 FLOOR WIRE) 

    Result: 

    NG 

    REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

  8. CHECK HYBRID VEHICLE CONTROL ECU 
    1. Connect terminals 42 (RMT) and 43 (RMTG) of the A31 hybrid vehicle control ECU connector.
      GTY899370Courtesy 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
      Rear Motor Temperature

      OK

      Tester Display  Condition Specified Condition
      Rear Motor Temperature Terminals A31-42 (RMT) and A31-43 (RMTG) connected
      Ignition switch ON      		 215°C (419°F)
    3. Turn the ignition switch off.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FRAME WIRE - 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] 

  9. READ VALUE USING GTS (CHECK WIRE HARNESS SHORT CIRCUIT) 
    1. Disconnect the NM1 frame wire connector.
    2. Read the Data List.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Rear Motor Temperature

      OK

      Tester Display  Switch Condition Specified Condition
      Rear Motor Temperature Ignition switch ON -40°C
    3. Turn the ignition switch off.
    4. Reconnect the NM1 frame wire connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  10

  10. CHECK CONNECTOR CONNECTION CONDITION (REAR MOTOR TEMPERATURE SENSOR CONNECTOR) 
    1. Remove the rear suspension member sub-assembly.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

    2. Check the connection condition of the rear 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.
      GTY851143Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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.

      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
    3. Reinstall the rear suspension member sub-assembly.

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  11

  11. INSPECT REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (REAR MOTOR TEMPERATURE SENSOR) 
    1. Remove the rear suspension member sub-assembly.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

    2. Disconnect the N5 rear motor temperature sensor connector.
      GTY851143Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection  Condition Specified Condition
      N5-1 (RMTG) - N5-2 (RMT) Ignition switch off 0.4 to 2100 kΩ
    4. Reconnect the N5 rear motor temperature sensor connector.
      GTY854726Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Rear Motor Temperature Sensor (Rear Traction Motor with Transaxle Assembly))
    5. Reinstall the rear suspension member sub-assembly.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - FRAME WIRE) 

    Result: 

    NG 

    REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

  12. CHECK HARNESS AND CONNECTOR (FRAME WIRE - HYBRID VEHICLE CONTROL ECU) 
    1. Disconnect the NM1 frame wire connector.
    2. Disconnect the A31 hybrid vehicle control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY942267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of frame wire connector
      (Hybrid Vehicle Control ECU Side)
      *b Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)

      Standard Resistance (Check for Open)

      Tester Connection  Condition Specified Condition
      NM1-6 (RMTG) - A31-43 (RMTG) Ignition switch off Below 1 Ω
      NM1-3 (RMT) - A31-42 (RMT) Ignition switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection  Condition Specified Condition
      NM1-6 (RMTG) or A31-43 (RMTG) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      NM1-3 (RMT) or A31-42 (RMT) - Body ground and other terminals Ignition switch off 10 kΩ or higher
    4. Reconnect the A31 hybrid vehicle control ECU connector.
    5. Reconnect the NM1 frame wire 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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