HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A2A11, P0A2A15

DTC Code DTC Name
P0A2A11 Drive Motor "A" Temperature Sensor Circuit Short to Ground
P0A2A15 Drive Motor "A" Temperature Sensor Circuit Short to Auxiliary Battery or Open

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    These DTCs are stored when the motor temperature sensor output is abnormal. The cause of this malfunction may be one of the following:


      Hybrid vehicle control ECU internal malfunction

    • Hybrid vehicle control ECU malfunction


      Motor temperature sensor malfunction

    • Internal motor temperature sensor malfunction

    • Open or short in motor temperature sensor


      Wire harness between the motor temperature sensor and hybrid vehicle control ECU

    • The connectors are not connected properly

    • Foreign matter or water on the connector terminals

    • Open or short in wire harness

    Tech Tips

    If any of these DTCs are stored, the motor temperature sensor is malfunctioning and the self-protection function may not operate. Therefore under certain high load driving condition, the temperature of the motor (MG2) becomes high. If the self-protection function does not operate, the motor (MG2) may malfunction and cause the vehicle to enter fail-safe mode.

DESCRIPTION

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

Tech Tips

The term "drive motor A" indicates the motor (MG2).

A005O3HE22
*1 Resistance (kΩ)
*2 Temperature (°C (°F))
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A2A11 Drive Motor "A" Temperature Sensor Circuit Short to Ground

Line short or short to ground in the motor temperature sensor circuit

(1 trip detection logic)

  • Wire harness or connector

  • Hybrid vehicle control ECU

  • Hybrid vehicle transaxle assembly (Motor temperature sensor)

 Does not come on

Master Warning Light:

Comes on
P0A2A15 Drive Motor "A" Temperature Sensor Circuit Short to Auxiliary Battery or Open

Open or short to +B in the motor temperature sensor circuit

(1 trip detection logic)

  • Wire harness or connector

  • Hybrid vehicle control ECU

  • Hybrid vehicle transaxle assembly (Motor temperature sensor)

 Does not come on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P0A2A11 Motor Temperature
P0A2A15

Tech Tips

After confirming that DTC P0A2A11 or P0A2A15 is output, use the GTS to check "Motor Temperature" in the Data List.

Displayed Temperature Malfunction
-40°C (-40°F) Open circuit or short to +B
215°C (419°F) Short circuit or short to ground

CONFIRMATION DRIVING PATTERN

Tech Tips

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

  6. With power switch on (IG) and wait for 5 seconds or more.

  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  8. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

WIRING DIAGRAM

A005MZRE68
*a ADC
*b No. 1 Engine Room Relay Block
*c Motor Temperature Sensor (Hybrid Vehicle Transaxle Assembly)
*d Hybrid Vehicle Control ECU

PROCEDURE


  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.

      Click here

      A005N5YC01
      *A for LHD *B for RHD
      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. CHECK CONNECTOR CONNECTION CONDITION (MOTOR TEMPERATURE SENSOR CONNECTOR)


    1. A005NPR

      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

  3. READ VALUE USING GTS (MOTOR TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temperature.

    4. 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

    5. Turn the power switch off.


    B

    INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR TEMPERATURE SENSOR) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  4. INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR TEMPERATURE SENSOR)


    1. A005NPR

      Disconnect the motor temperature sensor connector.

    2. A005N25C07
      *a

      Component without harness connected

      (Motor Temperature Sensor (Hybrid Vehicle Transaxle Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C9-1 (MMT) - C9-2 (MMTG) Power switch off 0.343 to 1442 kΩ

    3. Reconnect the motor temperature sensor connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    OK

  5. CHECK HYBRID VEHICLE CONTROL ECU


    1. A005NZLC02
      *a

      Component with harness connected

      (to Hybrid Vehicle Control ECU)

      Connect terminals 24 (MMT) and 23 (MMTG) of the A49 hybrid vehicle control ECU connector.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temperature.

    5. Read the Data List.


      Powertrain > Hybrid Control > Data List
      Tester Display
      Motor Temperature
      OK
      Tester Display Condition Specified Condition
      Motor Temperature

      Terminals A49-24 (MMT) and A49-23 (MMTG) connected

      Power switch on (IG)

      		 215°C (419°F)
      Result
      Proceed to
      OK
      NG

    6. Turn the power switch off.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

  6. INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR TEMPERATURE SENSOR)


    1. A005NPR

      Disconnect the motor temperature sensor connector.

    2. A005N25C07
      *a

      Component without harness connected

      (Motor Temperature Sensor (Hybrid Vehicle Transaxle Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C9-1 (MMT) - C9-2 (MMTG) Power switch off 0.343 to 1442 kΩ

    3. Reconnect the motor temperature sensor connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (MOTOR TEMPERATURE SENSOR - HYBRID VEHICLE CONTROL ECU)


    1. Disconnect the motor temperature sensor connector.

    2. Disconnect the hybrid vehicle control ECU connector.

    3. A005O2ZC01
      *a

      Front view of wire harness connector

      (to Motor Temperature Sensor)
      *b

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU)

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      C9-1 (MMT) - A49-24 (MMT) Power switch off Below 1 Ω
      C9-2 (MMTG) - A49-23 (MMTG) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      C9-1 (MMT) or A49-24 (MMT) - Body ground and other terminals Power switch off 10 kΩ or higher
      C9-2 (MMTG) or A49-23 (MMTG) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Reconnect the hybrid vehicle control ECU.

    5. Reconnect the motor temperature sensor connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR