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HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A9300

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DTC Code DTC Name
P0A9300 Inverter "A" Cooling System Performance
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DTC SUMMARY


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  1. MALFUNCTION DESCRIPTION

    This DTC indicates when the temperature inside the inverter has become abnormal. The cause of this malfunction may be one of the following:


    • Internal inverter malfunction

    • Inverter internal circuit malfunction

    • Malfunction in ECU that controls the inverter

    • Malfunction in sensor for inverter control (coolant sensor)


    • Hybrid cooling system malfunction

    • Coolant is leaking, insufficient coolant level, frozen or the passenger of coolant is clogged.

    • Grille is blocked.

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DESCRIPTION

Refer to the system description for the cooling system.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A9300 Inverter "A" Cooling System Performance

  • Inverter coolant temperature increases as well as the temperature of any inverter with converter assembly related parts due to an inverter cooling system malfunction.

  • When the actual temperature of the inverter coolant is higher than the sensor value by a certain value or more and the actual temperature is high.

(1 trip detection logic)

  • Inverter cooling system

  • Inverter water pump assembly

  • Inverter with converter assembly

  • Cooling fan system

  • Grille shutter system*

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on

*: w/ Grille shutter

Table 1. Related Data List
DTC No. Data List
P0A9300

  • Inverter Coolant Water Temperature

  • Motor Inverter Temperature

  • Generator Inverter Temperature

  • Boosting Converter Temperature (Upper)

  • Boosting Converter Temperature (Lower)

  • Inverter Water Pump Revolution
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CONFIRMATION DRIVING PATTERN

Tip:

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

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  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. Turn the power switch on (READY) and wait for 5 seconds or more.

  8. Perform a road test according to the freeze frame data item "Vehicle Speed" for approximately 10 minutes.

    (Check the Data List items "Inverter Coolant Water Temperature", "Motor Inverter Temperature", "Generator Inverter Temperature", "Boosting Converter Temperature (Upper)" and "Boosting Converter Temperature (Lower)" to prevent the motor inverter from overheating.

    Note:

    As the state of charge of the HV battery voltage may be low after driving in fail-safe mode, it will automatically be charged for 5 to 10 minutes after repairs have been performed and turn the power switch on (READY).

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

  10. Check the DTC judgment result.

    Tip:

    • 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, perform driving pattern again.

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WIRING DIAGRAM

Refer to the wiring diagram for cooling system.

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CAUTION / NOTICE / HINT

CAUTION:

  • B004STG

    Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.


    • Inspecting the high-voltage system

    • Disconnecting the low voltage connector of the inverter with converter assembly

    • Disconnecting the low voltage connector of the HV battery

  • B004Y5N

    To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.

  • B004SX1

    After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • B004W3JC06
    *a Without waiting for 10 minutes

    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.

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    Tip:

    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.

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PROCEDURE


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    CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control, Motor Generator and Engine / Trouble Codes.

    4. Check for DTCs.


      1. Powertrain > Hybrid Control > Trouble Codes



      1. Powertrain > Motor Generator > Trouble Codes



      1. Powertrain > Engine > Trouble Codes


      Result
      Result Proceed to
      P0A9300 only is output, or DTCs except the ones in the table below are also output. A
      DTCs of hybrid control system in the table below are output. B
      DTCs of motor generator control system in the table below are output. C
      DTCs of SFI system in the table below are output (w/ Grille shutter). D
      Table 2. Table 1
      Malfunction Content System Relevant DTC
      Insulation malfunction Hybrid control system P1C7C49 Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure
      P1C7D49 Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure
      P1C7E49 Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure
      P1C7F49 Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure
      Table 3. Table 2
      Malfunction Content System Relevant DTC
      Sensor and actuator circuit malfunction Hybrid control system P0C7396 Motor Electronics Coolant Pump "A" Component Internal Failure
      P314A31 Motor Electronics Coolant Pump "A" No Signal
      Motor generator control system P0A0011 Motor Electronics Coolant Temperature Sensor Circuit Short to Ground
      P0A0015 Motor Electronics Coolant Temperature Sensor Circuit Short to Battery or Open
      System malfunction SFI system P059F73 Active Grille Air Shutter "A" Actuator Stuck Closed
      P05A072 Active Grille Air Shutter "A" Actuator Stuck Open
      P05A211 Active Grille Air Shutter "A" Circuit Short to Ground
      P05A212 Active Grille Air Shutter "A" Circuit Short to Battery
      P05A213 Active Grille Air Shutter "A" Circuit Open
      P05A27E Active Grille Air Shutter "A" Actuator Stuck On
      P05A27F Active Grille Air Shutter "A" Actuator Stuck Off
      P05B112 Active Grille Air Shutter "B" Circuit Short to Battery
      P05B114 Active Grille Air Shutter "B" Circuit Short to Ground or Open
      P05B131 Active Grille Air Shutter "B" No Signal
      U028487 Lost Communication with Active Grille Air Shutter Module "A" Missing Message
      Tip:

      • P0A9300 may be output as a result of the malfunction indicated by the DTCs above.


        1. The chart above is listed in inspection order of priority.

        2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)

    5. Turn the power switch off.


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    CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY 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
    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. B004SKUC01
      *A for LHD *B for RHD

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

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      Note:

      Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off.

      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
      Tip:

      When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected.


    • AClick here
    • B

      CONNECT SECURELY

    • C

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    CHECK COOLING SYSTEM

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    Tip:

    If the "Cooling System" inspection results are normal, perform the next step.

    Result
    Proceed to
    NEXT