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

DTC SUMMARY

MALFUNCTION DESCRIPTION

The power management control ECU detects that a safety device (interlock) is operated or that there is an open circuit in the detection circuit. (Even if the an open circuit occurs while the vehicle is stopped, the system determines that the safety device was operated.)

The cause of this malfunction may be one of the following:


  1. Detection switch system malfunction


    • Inverter with converter assembly malfunction

    • Service plug malfunction

  2. Low-voltage system malfunction


    • Power management control ECU malfunction

    • Inverter with converter assembly malfunction

    • Service plug malfunction

    • Wire harness malfunction

    • Connector malfunction

INSPECTION DESCRIPTION
A01I3JGE01
System Diagram Location Inspection Content Reason Inspection Step
*a

  • Check whether the safety device (interlock) is connected securely and installed properly (service plug grip, inverter upper cover or connector cover assembly, etc.).

  • Power management control ECU connector or inverter connector.

 DTC output due to improper connection or forgetting to install parts. 4 to 8
*b Inspect the detection circuit. DTC output due to an open circuit or improper connection (dirt, foreign matter, etc.). 9 to 20

DESCRIPTION


DTC No. INF Code DTC Detection Condition Trouble Are
P0A0D 350

Either of the following conditions is met:


  • With the vehicle stopped, the service plug grip, upper inverter cover, connector cover assembly or No. 4 engine wire (air conditioning harness) with a safety device was removed.

  • With the vehicle stopped, the interlock signal line became open.

    (1 trip detection logic)

  • Wire harness or connector

  • Power management control ECU

  • Service plug grip

  • Inverter with converter assembly

  • No. 4 engine wire

  • Upper inverter cover
351

Interlock signal line opens while the vehicle is being driven (at 5 km/h (3 mph) or more)

(1 trip detection logic)

WIRING DIAGRAM

A01I4A3E02

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.

Tech Tips

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


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

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the Techstream 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 Techstream to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Clear DTCs and freeze frame data.

    5. Turn the power switch off.


    NEXT

  3. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the Techstream 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 or 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. A01I2DNE01
      Text in Illustration
      *1 Service Plug Grip
      *a Correct
      *b Incorrect

      Check if the service plug grip is installed correctly.

      Standard
      The service plug grip is fully pushed in as shown in the illustration.

      Note


      • Insert the service plug grip until a click sound is heard.

      • If "UNLOCK" is printed on the service plug grip, push in the service plug grip until "UNLOCK" is not visible at all.

      Tech Tips


      • For the removal and installation procedures Click here.

      • P0A0D-350 is also set 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 CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. A01I61A

      Check the connector connections and contact pressure of the relevant terminals for the power management control ECU connectors Click here.

      OK
      The connectors are connected securely and there are no contact pressure problems.

    NG

    CONNECT SECURELY

    OK

  6. 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 the 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.

      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.

      A01I3MYE01
      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

  7. CHECK UPPER INVERTER COVER (GENERATOR CABLE SIDE)

    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. A01I3C2

      Check if the upper inverter cover (generator cable side) of the inverter with converter assembly is installed correctly.

      OK
      The upper inverter cover (generator cable side) is installed correctly.

    NG

    INSTALL PARTS CORRECTLY

    OK

  8. CHECK UPPER INVERTER COVER (MOTOR CABLE SIDE)

    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. A01I3ON

      Check if the upper inverter cover (motor cable side) of the inverter with converter assembly is installed correctly.

      OK
      The upper inverter cover (motor cable side) is installed correctly.

    NG

    INSTALL PARTS CORRECTLY

    OK

  9. 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. A01I5ZB

      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

  10. CHECK NO. 4 ENGINE WIRE

    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. A01I614

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

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

    NG

    INSTALL PARTS CORRECTLY

    OK

  11. 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. A01I5YK

      Disconnect the A14 inverter with converter assembly connector.

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

    4. Turn the power switch on (IG).

    5. A01I645E02
      Text in Illustration
      *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
      Tester Connection Switch Condition Specified Condition
      A14-16 (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. Reconnect the A14 inverter with converter assembly connector.


    NG

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

    OK

  12. 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 A14 inverter with converter assembly connector.

    3. A01I4Z1E02
      Text in Illustration
      *a

      Component without harness connected

      (Inverter with Converter Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A14-16 (ILKI) - A14-5 (ILKO) Power switch off Less than 10 Ω

      Note

      Do not remove the upper inverter cover, connector cover assembly and No. 4 engine wire.

    4. Reconnect the A14 inverter with converter assembly connector.


    NG

    CHECK UPPER INVERTER COVER (GENERATOR CABLE SIDE) Click here

    OK

  13. 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 A14 inverter with converter assembly connector.

    3. Install the service plug grip.

    4. A01I645E03
      Text in Illustration
      *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
      Tester Connection Switch Condition Specified Condition
      A14-5 (ILKO) - Body ground Power switch off Below 1 Ω

    5. Remove the service plug grip.

    6. Reconnect the A14 inverter with converter assembly connector.


    NG

    CHECK SERVICE PLUG GRIP Click here

    OK

  14. CHECK CONNECTOR CONNECTION CONDITION (INTERLOCK CIRCUIT)


    1. Check the connections of each connector.

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

    NG

    REPAIR OR REPLACE CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  15. CHECK SERVICE PLUG GRIP


    1. Remove the service plug grip.

    2. A01I4V7E01
      Text in Illustration
      *1 Service Plug Grip

      Check the condition of the service plug grip interlock.

      OK
      Dirt or foreign matter has not entered the connection, and there is no evidence of contamination.
    3. A01I2DNE01
      Text in Illustration
      *1 Service Plug Grip
      *a Correct
      *b Incorrect

      Install the service plug grip.

      Note


      • Insert the service plug grip until a click sound is heard.

      • If "UNLOCK" is printed on the service plug grip, push in the service plug grip until "UNLOCK" is not visible at all.


    NG

    REPLACE SERVICE PLUG GRIP Click here

    OK

  16. 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. A01I3TPE01
      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

  17. 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 A14 inverter with converter assembly connector.

    3. Disconnect the r2 service plug connector.

    4. A01I3KAE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)
      *b

      Front view of wire harness connector

      (to Service Plug Grip)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A14-5 (ILKO) - r2-1(ILK) Power switch off Below 1 Ω

    5. Reconnect the r2 service plug connector.

    6. Reconnect the A14 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)

  18. CHECK UPPER INVERTER COVER (GENERATOR CABLE SIDE)

    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. A01I3C2

      Remove the upper inverter cover (generator cable side) from the inverter with converter assembly.

    3. A01I5DFE01
      Text in Illustration
      *1 Upper Inverter Cover (Generator Cable Side)

      Check the condition of the upper inverter cover (generator cable side) interlock.

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

    4. Install the upper inverter cover (generator cable side) to the inverter with converter assembly.


    NG

    REPLACE UPPER INVERTER COVER (GENERATOR CABLE SIDE) Click here

    OK

  19. CHECK UPPER INVERTER COVER (MOTOR CABLE SIDE)

    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. A01I3ON

      Remove the upper inverter cover (motor cable side) from the inverter with converter assembly.

    3. A01I5DFE01
      Text in Illustration
      *1 Upper Inverter Cover (Motor Cable Side)

      Check the condition of the upper inverter cover (motor cable side) interlock.

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

    4. Install the upper inverter cover (motor cable side) to the inverter with converter assembly.


    NG

    REPLACE UPPER INVERTER COVER (MOTOR CABLE SIDE) Click here

    OK

  20. 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. A01I5ZB

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

    3. A01I67PE05
      Text in Illustration
      *1 Connector Cover Assembly

      Check the condition of the connector cover assembly interlock.

      OK
      Dirt or foreign matter has 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

  21. CHECK NO. 4 ENGINE WIRE (NO. 4 ENGINE WIRE 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. A01I614

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

    3. A01I4FME01
      Text in Illustration
      *1 No. 4 engine wire (air conditioning harness)

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

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

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


    NG

    REPLACE NO. 4 ENGINE WIRE

    OK

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

  22. 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 A14 inverter with converter assembly connector.

    3. Disconnect the A38 power management control ECU connector.

    4. A01I2K6E01
      Text in Illustration
      *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
      Tester Connection Switch Condition Specified Condition
      A14-16 (ILKI) - A38-22 (ILK) Power switch off Below 1 Ω

    5. Reconnect the A38 power management control ECU connector.

    6. Reconnect the A14 inverter with converter assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here