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

A003S8QE02

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.

  • 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 A105 from the inverter with converter assembly.

    3. Disconnect connector A99 from the power management control ECU.

    4. A003S2AE06
      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
      A99-31 (HSDN) or A105-31 (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 A105 from the inverter with converter assembly.

    3. A003TGGE20
      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
      A105-31 (HSDN) - A105-28 (GND1) Power switch off 2.65 to 3.55 kΩ

    4. Connect the inverter with converter assembly connector.


    NG

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here