СИСТЕМА УПРАВЛЕНИЯ ГИБРИДНОЙ СИСТЕМОЙ, Diagnostic DTC:P0A93-346

DTC Code DTC Name
P0A93-346 Inverter Cooling System Performance

DESCRIPTION

The inverter converts the high-voltage direct current of the HV battery into alternating current for generator (MG1) and motor (MG2). The inverter generates heat during the conversion process. Therefore, the inverter is cooled by a special cooling system consisting of the inverter water pump with motor assembly, the cooling fan, and a radiator. This cooling system is independent of the engine cooling system. The power management control ECU monitors the inverter water pump with motor assembly, cooling fan and cooling system, and detects malfunctions.

A01FRT5E01
Text in Illustration
*A for LHD *B for RHD
*1 Inverter Water Pump with Motor Assembly *2 Inverter Reserve Tank Assembly
*3 Inverter with Converter Assembly *4 Radiator Assembly (HV)
*5 Hybrid Vehicle Transmission Assembly - -
DTC No. DTC Detection Condition Trouble Area
P0A93-346

Inverter coolant temperature increases as well as the temperature of any inverter with converter assembly related parts increases.

(1 trip detection logic)

  • Inverter cooling system

  • Inverter water pump with motor assembly

  • Inverter with converter assembly

  • Cooling fan system

  • Wire harness or connector
Related Data List
DTC No. Data List
P0A93-346

  • Inverter Coolant Water Temperature

  • Inverter Temp-(MG2)

  • Inverter Temp-(MG1)

  • DC/DC Cnv Temp (Upper)

  • DC/DC Cnv Temp (Lower)

  • Inverter W/P Revolution

INSPECTION PROCEDURE

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work Click here.

    Tech Tips

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note


  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

  • If DTC P0A78-284, 286, P0A7A-322, 324, P0A94-553 or 557 is output, replace the inverter with converter assembly after this inspection.

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Perform a road test according to the freeze frame data "Vehicle Spd" for approximately 15 minutes.

    During the road test, check Data List items "Inverter Coolant Water Temperature", "Inverter Temp-(MG2)", "Inverter Temp- (MG1)", "DC/DC Cnv Temp (Upper)" and " DC/DC Cnv Temp (Lower)" to prevent the relevant parts from overheating.

PROCEDURE


  1. CHECK VEHICLE CONDITION


    1. Make sure that the front side of the radiator grille is not blocked with anything.

    2. Ask the customer if the front side of the radiator grille was blocked with anything.

      Result
      Result Proceed to
      Not blocked. A
      Is/was blocked. B

      Tech Tips

      If the radiator grille is blocked, the inverter coolant temperature will increase and this DTC may be stored.


    B

    IF EQUIPPED, EXPLAIN TO CUSTOMER THAT OPTIONAL COMPONENTS WILL BE REMOVED

    A

  2. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Check for DTCs.

      Result
      Result Proceed to
      P0A93-346 only is output, or DTCs except the ones in the table below are also output. A
      Any of the following DTCs are also output. B
      Relevant DTC
      P0A02-719 Motor Electronics Coolant Temperature Sensor Circuit Low
      P0A03-720 Motor Electronics Coolant Temperature Sensor Circuit High
      P0C73-776 Motor Electronics Coolant Pump "A" Control Performance
      P314A-828 Inverter Coolant Pump Speed Signal

      Tech Tips

      P0A93-346 may be stored due to a malfunction which also causes DTCs in the preceding table to be stored. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

  3. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Check connection condition of the low voltage connector of the inverter with converter assembly and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter Click here.

      A01FRYME01
      Text in Illustration
      *A for LHD *B for RHD

      Note

      Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.

      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

      Tech Tips

      When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.


    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  4. CHECK QUANTITY OF HV COOLANT


    1. Проверьте уровень охлаждающей жидкости гибридной системы в расширительном бачке инвертора.

    2. Проверьте, нет ли утечек охлаждающей жидкости гибридной системы.

      Результат
      Результат Перейти к
      Утечки не обнаружены, и уровень охлаждающей жидкости в расширительном бачке инвертора выше нижней отметки. А
      Утечки не обнаружены, и уровень охлаждающей жидкости в расширительном бачке инвертора ниже нижней отметки. B
      Обнаружены утечки охлаждающей жидкости гибридной системы. C

      Note

      Насос системы охлаждения инвертора с электродвигателем в сборе имеет функцию защиты, которая активируется в случае утечки охлаждающей жидкости гибридной системы. Таким образом, нет необходимости заменять насос системы охлаждения инвертора с электродвигателем в сборе, если только причиной утечки охлаждающей жидкости гибридной системы не является насос системы охлаждения инвертора с электродвигателем в сборе.

      Tech Tips

      После устранения утечек и добавления охлаждающей жидкости гибридной системы выполните испытания Active Test "Activate the (Inverter) Water Pump" (включение насоса системы охлаждения инвертора) (испытание из раздела HV) и "Control the Electric Cooling Fan" (управление электрическим вентилятором системы охлаждения) (испытание из раздела Engine), и убедитесь в отсутствии неисправностей.


    B

    ADD HV COOLANT

    C

    INSPECT FOR HV COOLANT LEAK AND ADD HV COOLANT

    A

  5. CHECK COOLANT HOSE


    1. Убедитесь, что шланги системы охлаждения не перегнуты и не засорены.


    NG

    REPAIR OR REPLACE COOLANT HOSE

    OK

  6. PERFORM ACTIVE TEST USING GTS (CONTROL THE ELECTRIC COOLING FAN)


    1. Подключите GTS к DLC3.

    2. Включите питание (IG).

    3. Войдите в следующие меню: Powertrain / Engine and ECT / Active Test / Control the Electric Cooling Fan.

    4. Выполните испытание Active Test "Control the Electric Cooling Fan" (управление электрическим вентилятором системы охлаждения).

      OK
      Вентилятор системы охлаждения вращается.

    5. Выключите питание.


    NG

    CHECK COOLING FAN SYSTEM Click here

    OK

  7. READ VALUE USING GTS (DATA LIST)


    1. Turn the power switch off and leave the vehicle for at least 1 hour.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Enter the following menus: Powertrain / Hybrid Control / Data List / Inverter Coolant Water Temperature, Inverter Temp (MG2), Cnv Tmp (Upper), Cnv Temp (Lower), Inverter Temp (MG1).

    5. Read the Data List.

      Result
      Result Proceed to
      Other than below. A
      "Inverter Coolant Water Temperature" value is higher than the displayed temperature of any other Data List item by 20°C (68°F) or more. B

      Tech Tips

      The lower limit temperature that can be displayed for "Inverter Temp- (MG1)", "Inverter Temp- (MG2)", "Cnv Tmp (Upper)" and "Cnv Temp (Lower)" is 15°C (59°F). The lower limit temperature for "Inverter Coolant Water Temperature" is -40°C (-40°F). The "Inverter Coolant Water Temperature" value displayed on the GTS may be lower than the others, but this is not a malfunction.

    6. Turn the power switch off.


    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    A

  8. CHECK HV COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING)


    1. Подключите GTS к DLC3.

    2. Включите питание (IG).

    3. Войдите в следующие меню: Powertrain / Hybrid Control / Trouble Codes.

    4. С помощью GTS считайте значение "Ambient Temperature" в данных фиксированного набора параметров.

    5. Убедитесь, что значение параметра "Ambient Temperature" из фиксированного набора параметров ниже температуры замерзания охлаждающей жидкости гибридной системы.

      Результат
      Результат Перейти К
      Значение "Ambient Temperature" ниже температуры замерзания охлаждающей жидкости гибридной системы. А
      Значение "Ambient Temperature" превышает температуру замерзания охлаждающей жидкости гибридной системы. B

      Tech Tips


      • Охлаждающая жидкость гибридной системы (SLLC) с концентрацией 30% замерзает при температуре -15°C (5°F), а с концентрацией 50% – при температуре -35°C (-31°F).

      • При замерзании охлаждающей жидкости гибридной системы в радиаторе гибридной системы или насосе системы охлаждения гибридной системы температура охлаждающей жидкости в преобразователе-инверторе в сборе возрастает из-за прекращения циркуляции охлаждающей жидкости. В результате может быть зарегистрирован код DTC.

      • DTC сохранятся, если крыльчатка насоса системы охлаждения не может вращаться из-за замерзания охлаждающей жидкости гибридной системы.

      • Если DTC выводятся вследствие замерзания LLC, признак неисправности воспроизвести невозможно. Проверьте данные о замене LLC и выясните, замерзала ли LLC, исходя из температуры окружающего воздуха в момент сохранения кодов DTC.

    6. Выключите питание.


    B

    REPLACE INVERTER WATER PUMP WITH MOTOR ASSEMBLY Click here

    A

  9. REPLACE HV COOLANT


    1. Замените охлаждающую жидкость гибридной системы охлаждающей жидкостью с концентрацией (температурой замерзания), соответствующей условиям эксплуатации автомобиля (см. стр. Click here).


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