HYBRID CONTROL SYSTEM, Diagnostic DTC:P3233-750

DTC Code DTC Name
P3233-750 Open or Short to B+ in Blocking of HV Gate Connection

DESCRIPTION

Refer to the description for DTC P3232-749 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P3233 750 Open or short to +B in the emergency shutdown signal line when the IGBTs are operating.

  • Wire harness or connector

  • Hybrid vehicle control ECU

  • Inverter with converter assembly

WIRING DIAGRAM

Refer to the wiring diagram for DTC P3232-749 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 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 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. Turn the power switch on (IG).

    6. A01GZR3E06

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A78-25 (HSDN) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the connector of the hybrid vehicle control ECU or the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    7. Turn the power switch off.

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

      Standard resistance
      LHD
      Tester Connection Switch Condition Specified Condition
      A78-25 (HSDN) - A79-25 (HSDN) Power switch off Below 1 Ω
      RHD
      Tester Connection Switch Condition Specified Condition
      A78-25 (HSDN) - A88-25 (HSDN) Power switch off Below 1 Ω

    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.

    2. A01GZCZE05

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

      Standard resistance
      LHD
      Tester Connection Switch Condition Specified Condition
      A79-25 (HSDN) - A79-10 (+B) Power switch off 3.5 kΩ or higher
      A79-25 (HSDN) - A79-11 (+B2) Power switch off 3.5 kΩ or higher
      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) - A88-10 (+B) Power switch off 3.5 kΩ or higher
      A88-25 (HSDN) - A88-11 (+B2) Power switch off 3.5 kΩ or higher
      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

    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    C

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    A

    REPLACE HYBRID VEHICLE CONTROL ECU Click here