HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A0D-350, P0A0D-351

DTC Code DTC Name
P0A0D-350 High Voltage System Inter-Lock Circuit High
P0A0D-351 High Voltage System Inter-Lock Circuit High

DESCRIPTION


DTC No. INF Code DTC Detection Condition Trouble Area
P0A0D 350 Operating any of the safety devices with the vehicle stopped (ILK signal is ON) and turning the power switch on (IG)

  • Wire harness or connector

  • Power management control ECU

  • Service plug grip

  • Inverter with converter assembly

  • No. 4 floor wire (air conditioning harness)*1

  • Air conditioning harness*2

  • Inverter terminal cover
351 Interlock signal line opens (ILK signal is ON) while the vehicle is being driven

WIRING DIAGRAM

A01FQ2WE03
A01FQ2WE04

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.

PROCEDURE


  1. 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 if DTCs are output.

      Result
      Result Proceed to
      P0A0D only is output. A
      P0A1D is output. B

    5. Turn the power switch off.


    B

    GO TO DTC CHART (P0A1D) Click here

    A

  2. CLEAR DTC


    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. Read and record the DTCs and freeze frame data.

    5. Clear DTCs and freeze frame data.

    6. Turn the power switch off.


    NEXT

  3. 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 if DTCs are output.

      Result
      Result Proceed to
      P0A0D-350 or P0A0D-351 is output again. A
      Neither P0A0D-350 nor P0A0D-351 is output again. B

    5. Turn the power switch off.


    B

    CHECK CONNECTOR CONNECTION CONDITION (INTERLOCK CIRCUIT) Click here

    A

  4. CHECK SERVICE PLUG GRIP

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check if the service plug grip is installed correctly.

      OK
      The service plug grip is installed correctly.

      Tech Tips


      • For the removal and installation procedures Click here.

      • P0A0D-350 is also stored if the power switch is turned on (IG) with the service plug grip removed. Confirm the conditions when the malfunction occurred.


    NG

    INSTALL PARTS CORRECTLY

    OK

  5. CHECK INVERTER TERMINAL COVER

    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. A01FRI1E01
      Text in Illustration
      *A for LHD
      *B for RHD

      for Type A:


      1. Check if the inverter terminal cover of the inverter with converter assembly is installed correctly.

        OK
        The inverter terminal cover is installed correctly.
    3. A01FV5DE02
      Text in Illustration
      *A for LHD
      *B for RHD

      for Type B:


      1. Check if the inverter terminal cover of the inverter with converter assembly is installed correctly.

        OK
        The inverter terminal cover is installed correctly.

    NG

    INSTALL PARTS CORRECTLY

    OK

  6. CHECK CONNECTOR COVER ASSEMBLY

    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. A01FRDPE01
      Text in Illustration
      *A for LHD
      *B for RHD

      Check if the connector cover assembly of the inverter with converter assembly is installed correctly.

      OK
      The connector cover assembly is installed correctly.

    NG

    INSTALL PARTS CORRECTLY

    OK

  7. CHECK CONNECTOR CONNECTION CONDITION

    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. for LHD:


      1. Check if the No. 4 floor wire (air conditioning harness) is connected correctly.

        A01FTG5
        OK
        The No. 4 floor wire (air conditioning harness) connector is connected correctly.

    3. for RHD:


      1. Check if the air conditioning harness is connected correctly.

        A01FRLD
        OK
        The air conditioning harness connector is connected correctly.

    NG

    INSTALL PARTS CORRECTLY

    OK

  8. CHECK POWER MANAGEMENT CONTROL ECU

    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. Disconnect the connector from the inverter with converter assembly.

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Turn the power switch on (IG).

    5. A01FQOWE15
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      A38-35 (ILKI) - Body ground Power switch on (IG) 11 to 14 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      A74-35 (ILKI) - Body ground Power switch on (IG) 11 to 14 V

      Note

      Turning the power switch on (IG) with the inverter with converter assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

    7. Disconnect the cable from the negative (-) auxiliary battery terminal.

    8. Connect the inverter with converter assembly connector.


    NG

    CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - POWER MANAGEMENT CONTROL ECU) Click here

    OK

  9. CHECK INVERTER WITH CONVERTER ASSEMBLY (INTERLOCK)

    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. Disconnect the connector from the inverter with converter assembly.

    3. A01FRVVE06
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Component without harness connected

      (Inverter with Converter Assembly)

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

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      A38-35 (ILKI) - A38-24 (ILKO) Power switch off Less than 10 Ω
      for RHD
      Tester Connection Switch Condition Specified Condition
      A74-35 (ILKI) - A74-24 (ILKO) Power switch off Less than 10 Ω

      Note

      Do not remove the inverter terminal cover, connector cover assembly and No. 4 floor wire (air conditioning harness)*1 or air conditioning harness*2.


      • *1: for LHD

      • *2: for RHD

    4. Connect the inverter with converter assembly connector.


    NG

    CHECK INVERTER TERMINAL COVER Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - BODY GROUND)

    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. Disconnect the connector from the inverter with converter assembly.

    3. Install the service plug grip.

    4. A01FQOWE16
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

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

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      A38-24 (ILKO) - Body ground Power switch off Below 1 Ω
      for RHD
      Tester Connection Switch Condition Specified Condition
      A74-24 (ILKO) - Body ground Power switch off Below 1 Ω

    5. Remove the service plug grip.

    6. Connect the inverter with converter assembly connector.


    NG

    CHECK SERVICE PLUG GRIP Click here

    OK

  11. CHECK CONNECTOR CONNECTION CONDITION (INTERLOCK CIRCUIT)


    1. Check the connections of each connector.

      OK
      Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.

    NG

    REPAIR OR REPLACE CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  12. CHECK SERVICE PLUG GRIP


    1. Remove the service plug grip.

    2. A01FR2FE01
      Text in Illustration
      *1 Service Plug Grip

      Check the condition of the service plug grip interlock.

      OK
      Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.

    NG

    REPLACE SERVICE PLUG GRIP Click here

    OK

  13. CHECK CONNECTOR CONNECTION CONDITION (INTERLOCK 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. A01FR6QE01
      Text in Illustration
      *1 Interlock Connector

      Check that the interlock connector at the service plug grip installation socket is connected correctly.

      OK
      The connector is connected correctly.

    NG

    CONNECT SECURELY

    OK

  14. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - SERVICE PLUG GRIP)

    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. Disconnect the connector from the inverter with converter assembly.

    3. Disconnect the connector from the service plug.

    4. A01FRKVE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)
      *b

      Rear view of wire harness connector

      (to Service Plug Grip)

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

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      A38-24 (ILKO) - m2-1 (ILK) Power switch off Below 1 Ω
      for RHD
      Tester Connection Switch Condition Specified Condition
      A74-24 (ILKO) - m2-1 (ILK) Power switch off Below 1 Ω

    5. Connect the service plug grip connector.

    6. Connect the inverter with converter assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - SERVICE PLUG GRIP)

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SERVICE PLUG GRIP - BODY GROUND)

  15. CHECK INVERTER TERMINAL COVER

    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. A01FRI1E01
      Text in Illustration
      *A for LHD
      *B for RHD

      for Type A:


      1. Remove the inverter terminal cover from the inverter with converter assembly.

    3. A01FV5DE02
      Text in Illustration
      *A for LHD
      *B for RHD

      for Type B:


      1. Remove the inverter terminal cover from the inverter with converter assembly.

    4. A01FT0JE01
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Inverter Terminal Cover

      Check the condition of the inverter terminal cover interlock.

      OK
      Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.

    5. Install the inverter terminal cover to the inverter with converter assembly.


    NG

    REPLACE INVERTER TERMINAL COVER Click here

    OK

  16. CHECK CONNECTOR COVER ASSEMBLY

    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. A01FRDPE01
      Text in Illustration
      *A for LHD
      *B for RHD

      Remove the connector cover assembly from the inverter with converter assembly.

    3. A01FT98E01
      Text in Illustration
      *1 Connector Cover Assembly

      Check the condition of the connector cover assembly interlock.

      OK
      Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.

      Tech Tips

      The connector cover assembly is not available separately. If it requires replacement, replace the inverter with converter assembly.

    4. Install the connector cover assembly to the inverter with converter assembly.


    NG

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    OK

  17. CHECK HARNESS AND 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. for LHD:


      1. Disconnect the No. 4 floor wire (air conditioning harness) from the inverter with converter assembly.

        A01FTG5

      2. Check the No. 4 floor wire (air conditioning harness) interlock.

        A01FUB6E02
        OK
        Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.
        Text in Illustration
        *1 No. 4 Floor Wire (Air Conditioning Harness)

      3. Connect the No. 4 floor wire (air conditioning harness) to the inverter with converter assembly.

    3. for RHD:


      1. Disconnect the air conditioning harness from the inverter with converter assembly.

        A01FRLD

      2. Check the air conditioning harness interlock.

        A01FUB6E02
        OK
        Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.
        Text in Illustration
        *1 Air Conditioning Harness

      3. Connect the air conditioning harness to the inverter with converter assembly.

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE NO. 4 FLOOR WIRE Click here

    C

    REPLACE AIR CONDITIONING HARNESS

    A

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

  18. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

    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. Disconnect the connector from the inverter with converter assembly.

    3. Disconnect the connector from the power management control ECU.

    4. A01FV1HE04
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)
      *b

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      A38-35 (ILKI) - A35-22 (ILK) Power switch off Below 1 Ω
      for RHD
      Tester Connection Switch Condition Specified Condition
      A74-35 (ILKI) - A35-22 (ILK) Power switch off Below 1 Ω

    5. Connect the power management control ECU connector.

    6. Connect the inverter with converter assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here