HYBRID CONTROL SYSTEM, Diagnostic DTC:P3232-749

DTC Code DTC Name
P3232-749 Short to GND in Blocking of HV Gate Connection

DESCRIPTION

The power management control ECU (HV CPU) sends a shutdown signal to the inverter with converter assembly (MG ECU) to shut down the power supply to MG2 and MG1.

DTC No. INF Code DTC Detection Condition Trouble Area
P3232 749 Short to GND in the emergency shutdown signal line while the IGBTs are being shut down.

  • Wire harness or connector

  • Power management control ECU

  • Inverter with converter assembly

WIRING DIAGRAM

A01ND2DE01

INSPECTION PROCEDURE

Tech Tips

When attempting to reproduce the problem, turning the power switch on (IG) and off repeatedly makes it easier to reproduce the problem. Do not repeatedly turn the power switch on (READY) and off as this will activate a system main relay overheat protection.

PROCEDURE


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

    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 A79 from the inverter with converter assembly.

    3. Disconnect connector A81 from the power management control ECU.

    4. A01NEH5E01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)
      *2

      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
      A81-31 (HSDN) or A79-40 (HSDN) - Body ground and other terminals Power switch off 10 kΩ or higher

    5. Connect the power management control ECU connector.

    6. Connect the inverter with converter assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK INVERTER WITH CONVERTER 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. Disconnect connector A79 from the inverter with converter assembly.

    3. A01NH2YE14
      Text in Illustration
      *1

      Component with 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
      A79-40 (HSDN) - A79-10(GND1) Power switch off 2.65 to 3.55 kΩ
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    4. Connect the inverter with converter assembly connector.


    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    A

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here