HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A10-592

DTC Code DTC Name
P0A10-592 DC / DC Converter Status Circuit High Input

DESCRIPTION

Refer to the description for DTC P0A09-591 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A10 592 Hybrid vehicle converter (DC/DC converter) voltage switching (VLO) signal circuit malfunction (short to +B)

  • Wire harness or connector

  • Inverter with converter assembly

  • Power management control ECU

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A09-591 Click here.

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 POWER MANAGEMENT CONTROL ECU (CHECK WAVEFORM)


    1. Connect an oscilloscope between the power management control ECU terminals specified in the table below.

    2. Turn the power switch on (IG).

    3. A003VF3E08
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

      Measure the waveform.

      Item Content
      Terminal A19-11 (VLO) - H3-6 (E1)
      Equipment Setting 5 V/DIV., 50 ms/DIV.
      Condition Power switch on (IG)
      OK
      The waveform appears as shown in the illustration.

      Tech Tips


      • Perform this inspection with the power management control ECU connector connected.

    4. Turn the power switch off.


    NG

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

    OK

  2. CLEAR DTC


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Clear DTCs and freeze frame data.


    NEXT

  3. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Check if DTCs are output.

      Result
      Result Proceed to
      DTC P0A10-592 is not output. A
      DTC P0A10-592 is output again. B

    5. Turn the power switch off.


    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    A

  4. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems Click here.


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  5. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER - 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 connector A62 from the inverter with converter assembly.

    3. Disconnect connector A19 from the power management control ECU.

    4. Turn the power switch on (IG).

    5. A003WV6E15
      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 voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A62-3 (VLO) or A19-11 (VLO) - Body ground Power switch on (IG) Below 1 V

      Note

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

    6. Turn the power switch off.

    7. Connect the inverter with converter assembly connector.

    8. Connect the power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE POWER MANAGEMENT CONTROL ECU


    1. Replace the power management control ECU Click here.


    NEXT

  7. CLEAR DTC


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Clear DTCs and freeze frame data.


    NEXT

  8. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Check if DTCs are output.

      Result
      Result Proceed to
      DTC P0A10-592 is not output. A
      DTC P0A10-592 is output again. B

    5. Turn the power switch off.


    B

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    A

    COMPLETED