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

for Preparation Click here


DESCRIPTION

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

DTC No.
INF Code
DTC Detection Condition
Trouble Area
P3233
750
Open or +B short in emergency shutdown signal circuit
  1. Wire harness or connector
  2. HV control ECU
  3. w/ converter inverter assembly (MG ECU)

WIRING DIAGRAM

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

INSPECTION PROCEDURE

CAUTION:
  1. Turn the ignition switch off before inspecting the high-voltage system. Take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are working on the high-voltage system.
  2. After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.

HINT:
  1. At least 5 minutes is required to discharge the high-voltage capacitor inside the w/ converter inverter assembly.
  2. If DTC P0A78-305, P0A7A-343, or P0A79-697 is output together with P3233-750, the HSDN circuit may be shorted to +B.

1.CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - MG ECU)

CAUTION:
Be sure to wear insulated gloves.

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



    A108501E09

  1. Disconnect the H31 connector from the HV control ECU.

    NOTICE:
    Do not put the vehicle into the READY-on state with the service plug grip removed as this may cause a malfunction.

  1. Remove the inverter cover. (Click here)

    NOTICE:
    1. Wrap the interlock round terminal for the inverter cover with vinyl tape to prevent it from shorting to ground.
    2. Be sure to prevent water in the reservoir tank from entering the inverter.
    3. Removing the inverter cover causes the MG ECU board to be exposed. Therefore, temporarily install the inverter cover for each area to be inspected.

  1. Disconnect the I25 connector from the w/ converter inverter assembly (MG ECU).

  1. Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.

    Standard Resistance:
    Tester Connection
    		Specified Condition
    HSND (H31-21) - Body ground
    		Below 1 V

  1. Turn the ignition switch off.

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

    Standard Resistance:
    Tester Connection
    HV ECU - MG ECU
    		Specified Condition
    HSDN (H31-21) - HSDN (I25-26)
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK W/ CONVERTER INVERTER ASSEMBLY

CAUTION:
Be sure to wear insulated gloves.



    A108017E04

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

    Standard Resistance:
    Tester Connection
    		Specified Condition
    HSDN (I25-26) - +B (I25-7)
    		10 kΩ or higher
    HSDN (I25-26) - +B (I25-4)
    		10 kΩ or higher



NG
REPLACE W/ CONVERTER INVERTER ASSEMBLY
OK

REPLACE HYBRID VEHICLE CONTROL ECU