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Home >> Toyota >> 2016 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (Hybrid Control System (2GR-FXS) - Diagnostic Codes (6 Of 6)) >> Hybrid Control System >> DTC P0A2C-247: Drive Motor "A" Temperature Sensor Circuit Low; DTC P0A2D-249: Drive Motor "A" Temperature Sensor Circuit High [11/2016 - ] >> Procedure

DTC P0A2C-247: Drive Motor "A" Temperature Sensor Circuit Low; DTC P0A2D-249: Drive Motor "A" Temperature Sensor Circuit High [11/2016 - ]: Procedure

WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY 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.
      GTY430312Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [02/2014 - ]

      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:  2

    B 

    CONNECT SECURELY 

    Result:  3

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    A 

    See step  2

  2. 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 [02/2014 - ]

      OK

      - The connector is connected securely.

      - The terminals are not deformed and are connected securely.

      - No water or foreign matter in the connector.

      GTY687276Courtesy 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:  2

    B 

    CONNECT SECURELY 

    Result:  3

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    A 

    See step  3

  3. READ VALUE USING TECHSTREAM (MOTOR TEMP NO1) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No1.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Motor Temp No1
    4. Read the Data List.

      Result

      Proceed to
      -40°C (-40°F)
      215°C (419°F)
      Same as actual temperature
    5. Turn the power switch off.

    Result:  2

    215°C (419°F) 

    See step  6

    Result:  3

    Same as actual temperature 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    -40°C (-40°F) 

    See step  4

  4. INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR TEMPERATURE SENSOR) 
    1. Disconnect the C7 motor temperature sensor connector.
      GTY716961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      GTY694058Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Motor Temperature Sensor (Hybrid Vehicle Transaxle Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      1(MMT) - 3(MMTG) Power switch OFF 0.3436 to 1442 kΩ

      HINT: 

      The motor temperature sensor is not available as a supply part. If it requires replacement, replace the hybrid vehicle transaxle assembly.

    3. Reconnect the C7 motor temperature sensor connector.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

    Result:  1

    OK 

    See step  5

  5. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY 
    1. Connect terminals 24 (MMT) and 23 (MMTG) of the A85 hybrid vehicle control ECU assembly connector.
    2. Connect the Techstream to the DLC3.
    3. Turn the power switch on (IG).
      GTY721124Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (to Hybrid Vehicle Control ECU Assembly)
    4. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No1.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Motor Temp No1
    5. Read the Data List.

      OK

      Tester Display Condition Specified Condition
      Motor Temp No1 Terminals MMT and MMTG connected
      Power switch on (IG)      		 215°C (419°F)

      Result

      Proceed to
      OK
      NG
    6. Turn the power switch off.

    Result:  1

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  2

    NG 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

  6. INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR TEMPERATURE SENSOR) 
    1. Disconnect the C7 motor temperature sensor connector.
      GTY716961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      GTY694058Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Motor Temperature Sensor (Hybrid Vehicle Transaxle Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      1(MMT) - 3(MMTG) Power switch OFF 0.3436 to 1442 kΩ

      HINT: 

      The motor temperature sensor is not available as a supply part. If it requires replacement, replace the hybrid vehicle transaxle assembly.

    3. Reconnect the C7 motor temperature sensor connector.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

    Result:  1

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (MOTOR TEMPERATURE SENSOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 
    1. Disconnect the C7 motor temperature sensor connector.
    2. Disconnect the A85 hybrid vehicle control ECU assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY700467Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Motor Temperature Sensor)      		 *b Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      C7-1 (MMT) - A85-24 (MMT) Power switch off Below 1 Ω
      C7-3 (MMTG) - A85-23 (MMTG) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      C7-1 (MMT) or A85-24 (MMT) - Body ground and other terminals Power switch off 10 kΩ or higher
      C7-3 (MMTG) or A85-23 (MMTG) - Body ground and other terminals Power switch off 10 kΩ or higher
    4. Reconnect the A85 hybrid vehicle control ECU assembly connector.
    5. Reconnect the C7 motor temperature sensor connector.

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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