HYBRID CONTROL SYSTEM, Diagnostic DTC:P3232-749

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

DESCRIPTION

The hybrid vehicle control ECU 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

  • Hybrid vehicle control ECU

  • Inverter with converter assembly

WIRING DIAGRAM

A000WP6E03
*1 to ST CUT/IGCT2 Relay
*2 A79 (LHD), A88 (RHD)
*3 Inverter with Converter Assembly
*4 Hybrid Vehicle Control ECU

CAUTION / NOTICE / HINT

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 function.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)

    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. Disconnect connector A78 from the hybrid vehicle control ECU.

    4. Disconnect the low voltage connector from the inverter with converter assembly.

    5. A000WS6E05

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

      Standard resistance
      LHD
      Tester Connection Switch Condition Specified Condition
      A78-25 (HSDN) or A79-25 (HSDN) - Body ground and other terminals Power switch off 10 kΩ or higher
      RHD
      Tester Connection Switch Condition Specified Condition
      A78-25 (HSDN) or A88-25 (HSDN) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK INVERTER WITH CONVERTER ASSEMBLY


    1. A00100HE02

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

      Standard resistance
      LHD
      Tester Connection Switch Condition Specified Condition
      A79-25 (HSDN) - A79-30 (GND1) Power switch off 2.65 to 3.55 kΩ
      RHD
      Tester Connection Switch Condition Specified Condition
      A88-25 (HSDN) - A88-30 (GND1) Power switch off 2.65 to 3.55 kΩ
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    C

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here