DTC    P3233-750    Short to B+ in Blocking of HV Gate Connection

for Preparation Click here


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 gate is driving
  1. Wire harness or connector
  2. Hybrid vehicle control ECU
  3. Inverter with converter assembly

WIRING DIAGRAM

Refer to the wiring diagram for DTC P3232-749 (Click here).

INSPECTION PROCEDURE

CAUTION:
  1. 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.
  2. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

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

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

CAUTION:
Be sure to wear insulated gloves.

  1. Turn the power switch off and remove the service plug grip (Click here).

    NOTICE:
    After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual.



    A131170E08
  1. Disconnect the hybrid vehicle control ECU connectors.

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

  1. Turn the power switch on (IG).

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

    Standard voltage:
    LHD:
    Tester Connection
    Specified Condition
    HSDN (A59-6) - Body ground
    Below 1 V
    RHD:
    Tester Connection
    Specified Condition
    HSDN (A62-6) - Body ground
    Below 1 V

    NOTICE:
    Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

  1. Turn the power switch off.

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

    Standard resistance:
    Tester Connection
    Specified Condition
    HSDN (A55-73) - +B (A55-46)
    10 kΩ or more
    HSDN (A55-73) - +B2 (A55-23)
    10 kΩ or more
    HSDN (A55-73) - BATT (A55-20)
    10 kΩ or more

    HINT:
    To check for a short to +B, the power switch is turned on (IG). However, the battery voltage is not applied to terminals +B and +B2 because the IGCT relay is not turned on with connector A55 disconnected from the hybrid vehicle control ECU. Therefore, measure the resistance between terminals HSDN and +B and also between terminals HSDN and +B2.

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

    Standard resistance:
    LHD:
    Tester Connection
    Specified Condition
    HSDN (A55-73) - HSDN (A59-6)
    Below 1 Ω
    RHD:
    Tester Connection
    Specified Condition
    HSDN (A55-73) - HSDN (A62-6)
    Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK INVERTER WITH CONVERTER ASSEMBLY


    A133246E11
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    LHD:
    Tester Connection
    Specified Condition
    HSDN (A59-6) - +B (A59-31)
    10 kΩ or more
    HSDN (A59-6) - +B2 (A59-30)
    10 kΩ or more
    HSDN (A59-6) - Body ground
    2.65 to 3.55 kΩ
    RHD:
    Tester Connection
    Specified Condition
    HSDN (A62-6) - +B (A62-31)
    10 kΩ or more
    HSDN (A62-6) - +B2 (A62-30)
    10 kΩ or more
    HSDN (A62-6) - Body ground
    2.65 to 3.55 kΩ



NG
REPLACE INVERTER WITH CONVERTER ASSEMBLY
OK

REPLACE HYBRID VEHICLE CONTROL ECU (Click here)