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

1. Turn the power switch off and remove the service plug grip. Refer to PRECAUTION .
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

2. Disconnect the A61 hybrid vehicle control ECU connector.
   Fig 1: Identifying A62 Inverter With Converter Assembly And A61 Hybrid Vehicle Control ECU Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the A62 inverter with converter assembly connector.
4. Turn the power switch on (IG).
5. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Specified Condition
   HSDN (A62-12) - Body ground	Below 1 V

   NOTE:

   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.

6. Turn the power switch off.
7. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Specified Condition
   HSDN (A61-76) - +B1 (A61-2)	10 kΩ or more
   HSDN (A61-76) - +B2 (A61-1)	10 kΩ or more
   HSDN (A61-76) - BATT (A61-4)	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 +B1 and +B2 because the IGCT relay is not turned on with the A61 connector disconnected from the hybrid vehicle control ECU. Therefore, measure the resistance between terminals HSDN and +B1 and also between terminals HSDN and +B2.

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

   Standard resistance

   Tester Connection	Specified Condition
   HSDN (A61-76) - HSDN (A62-12)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying A62 Inverter With Converter Assembly Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Specified Condition
   HSDN (A62-12) - +B (A62-31)	10 kΩ or more
   HSDN (A62-12) - +B2 (A62-30)	10 kΩ or more
   HSDN (A62-12) - Body ground	2.65 to 3.55 kΩ

NG → See step   4 

OK → See step   3