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Home >> Toyota >> 2012 >> Prius V >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System [Diagnostic Codes (P0069-273 - P0A78-113)] >> Hybrid Control System >> DTC P0A2C-247: Drive Motor "A" Temperature Sensor Circuit Low; DTC P0A2D-249: Drive Motor "A" Temperature Sensor Circuit High >> Procedure

DTC P0A2C-247: Drive Motor "A" Temperature Sensor Circuit Low; DTC P0A2D-249: Drive Motor "A" Temperature Sensor Circuit High: Procedure

  1. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR) See step   3 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  2. 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.
    4. Read the Data List.

      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 → See step   5 

    C → See step   7 

    A: Go to next step 

  3. READ VALUE USING TECHSTREAM (CHECK FOR OPEN) 
    1. Disconnect the motor temperature sensor connector.
      Fig 1: Identifying Motor Temperature Sensor Connector
      GTY325129Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect terminals 1 (MMT) and 2 (MMTG) of vehicle side connector D8 of the motor temperature sensor.
      Fig 2: Motor Temperature Sensor Connector End View
      GTY332013Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect the Techstream to the DLC3.
    4. Turn the power switch on (IG).
    5. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No1.
    6. 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)
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Motor Temperature Sensor)

      HINT: 

      The motor temperature sensor is not available separately. If it requires replacement, replace the hybrid vehicle transaxle assembly.

    7. Turn the power switch off.
    8. Connect the motor temperature sensor connector.

    NG → See step   4 

    OK → See step   8 

  4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - MOTOR TEMPERATURE SENSOR) 
    1. Connect terminals 24 (MMT) and 25 (MMTG) of connector A21 of the power management control ECU.
      Fig 3: Checking Harness And Connector (Power Management Control ECU - Motor Temperature Sensor)
      GTY328645Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the Techstream to the DLC3.
    3. Turn the power switch on (IG).
    4. Enter the following menus: 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)      		 215°C (419°F)
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Power Management Control ECU)
    6. Turn the power switch off.

    NG → See step   9 

    OK → REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. READ VALUE USING TECHSTREAM (CHECK FOR SHORT) 
    1. Disconnect the motor temperature sensor connector.
      Fig 4: Identifying Motor Temperature Sensor Connector
      GTY325129Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the Techstream to the DLC3.
    3. Turn the power switch on (IG).
    4. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No1.
    5. Read the Data List.

      OK

      Tester Display Condition Specified Condition
      Motor Temp No1 Power switch on (IG) -40°C (-40°F)

      HINT: 

      The motor temperature sensor is not available separately. If it requires replacement, replace the hybrid vehicle transaxle assembly.

    6. Turn the power switch off.

    NG → See step   6 

    OK → See step   8 

  6. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - MOTOR TEMPERATURE SENSOR) 
    1. Disconnect the motor temperature sensor connector.
    2. Disconnect connector A21 from the power management control ECU.
    3. Measure the resistance according to the value(s) in the table below.
      Fig 5: Checking Harness And Connector (Power Management Control ECU - Motor Temperature Sensor)
      GTY339044Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance (Check for Open)

      Tester Connection Switch Condition Specified Condition
      D8-1 (MMT) - A21-24 (MMT) Power switch off Below 1 Ω
      D8-2 (MMTG) - A21-25 (MMTG) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Switch Condition Specified Condition
      D8-1 (MMT) or A21-24 (MMT) - Body ground and other terminals Power switch off 10 kΩ or higher
      D8-2 (MMTG) or A21-25 (MMTG) - Body ground and other terminals Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Motor Temperature Sensor)
      *b Rear view of wire harness connector
      (to Power Management Control ECU)
    4. Connect the power management control ECU connector.
    5. Connect the motor temperature sensor connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   9 

  7. CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS 
  8. REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  COMPONENTS 
  9. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to  COMPONENTS 
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