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 service information.

2. Disconnect the hybrid vehicle control ECU connectors.
   Fig 1: Identifying A54 And A60 Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect connector A60 from the inverter with converter assembly.
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 (A60-6) - 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 (A54-73) - +B1 (A54-46)	10 kΩ or more
   HSDN (A54-73) - +B2 (A54-23)	10 kΩ or more
   HSDN (A54-73) - BATT (A54-20)	10 kΩ or more

   HINT: 

   To check for a short to +B1, 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 connector A54 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 (A54-73) - HSDN (A60-6)	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 A60 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Specified Condition
   HSDN (A60-6) - +B (A60-31)	10 kΩ or more
   HSDN (A60-6) - +B2 (A60-30)	10 kΩ or more
   HSDN (A60-6) - Body ground	2.65 to 3.55 kΩ

NG → REPLACE INVERTER WITH CONVERTER ASSEMBLY 

OK → See step   3