HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A2C-247, P0A2D-249

DTC Code DTC Name
P0A2C-247 Drive Motor "A" Temperature Sensor Circuit Low
P0A2D-249 Drive Motor "A" Temperature Sensor Circuit High

DESCRIPTION

The resistance of the thermistor built into the motor temperature sensor changes in accordance with changes in MG2 temperature. The lower the MG2 temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance.

Tech Tips

The term "drive motor A" indicates MG2.

A000WU8E01
*1 Resistance (kΩ)
*2 Temperature (°C (°F))
DTC No. INF Code DTC Detection Condition Trouble Area
P0A2C 247 Short to GND in the motor temperature sensor circuit

  • Wire harness or connector

  • Hybrid vehicle control ECU

  • Hybrid vehicle transmission assembly
P0A2D 249 Open or short to +B in the motor temperature sensor circuit

Tech Tips

After confirming that DTC P0A2C-247 or P0A2D-249 is output, use the intelligent tester to check "Motor Temp No1" in the HV ECU data list.

Displayed Temperature Malfunction
-50°C (58°F) Open circuit or short to +B
205°C (401°F) Short to GND

WIRING DIAGRAM

A000VBQE02
*a Motor Temperature Sensor No. 1
*b Hybrid Vehicle Control ECU
*c Hybrid Vehicle Transmission Assembly (Motor Temperature Sensor)

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)


    1. A000XH7E01
      *1 Hybrid Vehicle Control ECU

      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.

      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

    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  2. READ VALUE USING INTELLIGENT TESTER (MOTOR1 TEMP)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the following menu items: Powertrain / Hybrid Control / Data List / Motor Temp No1.

    4. Read the data list.

      Result
      Result Proceed to
      -50°C (-58°F) A
      205°C (401°F) B
      Same as actual temperature C

    B

    CHECK MOTOR TEMPERATURE SENSOR Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  3. CHECK HYBRID VEHICLE CONTROL ECU


    1. Turn the power switch off.

    2. A000YYWE02
      *1 Component with harness connected: (Hybrid Vehicle Control ECU)

      Connect terminals 23 (MMT) and 22 (MMTG) of connector E58 of the hybrid vehicle control ECU.

    3. Turn the power switch on (IG).

    4. Select the following menu items: Powertrain / Hybrid Control / Data List / 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)

      		 205°C (401°F)

    NG

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    OK

  4. CHECK CONNECTOR CONNECTION CONDITION (MOTOR TEMPERATURE SENSOR CONNECTOR)


    1. Remove the hybrid vehicle transmission assembly.

      Click here

    2. A001050

      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.

      Click here

      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

    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  5. INSPECT HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR TEMPERATURE SENSOR)


    1. A001050

      Disconnect the motor temperature sensor connector.

    2. A000Z19C01
      *a

      Component without harness connected

      (Hybrid Vehicle Transmission Assembly (Motor Temperature Sensor))

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      4 (MMT) - 8 (MMTG) Power switch off 0.3436 to 1442 kΩ

    3. Reconnect the motor temperature sensor connector.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here

  6. CHECK MOTOR TEMPERATURE SENSOR


    1. A000TGSE03
      *1 Rear view of wire harness connector: (to Hybrid Vehicle Control ECU)

      Disconnect the hybrid vehicle control ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      E58-22 (MMTG) - E58-23 (MMT) Power switch off 0.3436 to 1442 kΩ
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      E58-22 (MMTG) or E58-23 (MMT) - Body ground and other terminals Power switch off 10 kΩ or higher

    3. Reconnect the hybrid vehicle control ECU connector.


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

  7. CHECK CONNECTOR CONNECTION CONDITION (MOTOR TEMPERATURE SENSOR CONNECTOR)


    1. Remove the hybrid vehicle transmission assembly.

      Click here

    2. A001050

      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.

      Click here

      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

    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  8. INSPECT HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR TEMPERATURE SENSOR)


    1. A001050

      Disconnect the motor temperature sensor connector.

    2. A000Z19C01
      *a

      Component without harness connected

      (Hybrid Vehicle Transmission Assembly (Motor Temperature Sensor))

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      4 (MMT) - 8 (MMTG) Power switch off 0.3436 to 1442 kΩ

    3. Reconnect the motor temperature sensor connector.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here