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)

  • Hybrid vehicle control ECU

  • Wire harness or connector

  • Hybrid vehicle converter

WIRING DIAGRAM

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

CAUTION / NOTICE / HINT

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 disconnecting 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.

Tech Tips

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

PROCEDURE


  1. CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)


    1. A000YI9E02
      *1 No. 2 Battery Pack Wire Connector
      *2 A Side
      *3 B Side
      A000WLNE01
      *1 No. 2 Battery Pack Wire Connector
      *2 A Side
      *3 nS1
      *4 B Side

      Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Connect an oscilloscope to the No. 2 battery pack wire connector terminals specified in the table below, and measure the waveform.

      Item Contents
      Terminal nS1-12 (VLO) - nS1-9 (GND)
      Equipment Setting 5 V/DIV., 50 ms./DIV.
      Condition Power switch on (IG)
      OK
      The waveform appears as shown in the illustration.

      Tech Tips


      • For the removal and installation procedures related to inspection of the waveform of the No. 2 battery pack wire connector, Click here.

      • Perform this inspection with the No. 2 battery pack wire connected.


    NG

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - NO. 2 BATTERY PACK WIRE CONNECTOR) Click here

    OK

  2. CLEAR DTC


    1. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    2. Read and record the DTCs and freeze frame data.

    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    4. Clear DTCs and freeze frame data.


    NEXT

  3. CHECK DTC OUTPUT (HV)


    1. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    2. Check if DTCs are output.

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

    B

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    A

  4. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems. Click here


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

  5. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - NO. 2 BATTERY PACK WIRE CONNECTOR)


    1. Turn the power switch off.

    2. A000YI9E02
      *1 No. 2 Battery Pack Wire Connector
      *2 A Side
      *3 B Side

      Disconnect the No. 2 battery pack wire connector.

    3. Turn the power switch on (IG).

    4. A000UAAE03
      *1 No. 2 Battery Pack Wire Connector
      *2 nS1
      *3 A Side
      *4 B Side

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      nS1-12 (VLO) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the No.2 battery pack wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.


    NG

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - NO. 2 BATTERY PACK WIRE CONNECTOR) Click here

    OK

  6. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONVERTER CONNECTOR)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Turn the power switch off.

    2. Remove the service plug grip Click here.

      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.

    3. A000WGT
      A000VXL

      Check the connection of the low voltage connector of the hybrid vehicle converter.

      OK
      The connector is connected securely and there are no contact problems.

      Tech Tips

      For the removal and installation procedures related to inspection of the connection of the low voltage connector of the hybrid vehicle converter, Click here.


    NG

    CONNECT SECURELY

    OK

  7. CHECK HARNESS AND CONNECTOR (NO. 2 BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER)


    1. Disconnect the low voltage connector from the hybrid vehicle converter.

      A000TQ0E02

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      nS1-12 (VLO) - Other terminals Power switch off 10 kΩ or higher
      z82-11 (VLO) - Other terminals Power switch off 10 kΩ or higher

    OK

    REPLACE HV CONVERTER Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - NO. 2 BATTERY PACK WIRE CONNECTOR)


    1. Turn the power switch off.

    2. Disconnect connector A76 from the hybrid vehicle control ECU.

    3. Turn the power switch on (IG).

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

      A000VBEE02
      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A76-27 (VLO) or nS1-12 (VLO) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the No. 2 battery pack wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR