DTC P33B3-00: External BBC Circuit [12/2021 - 10/2023]: Procedure

1. Following the display on the GTS, check the freeze frame data and read "State of External BBC" in the freeze frame data when P33B3-00 was output.

   Powertrain > Stop and Start > DTC (P33B3-00) > Freeze Frame Data 

   Tester Display
   State of External BBC

   Result

   Tester Display	Proceed to
   Duty Err	A
   Cycle Err
   Low Vol	B
   Overvol	C
   Overload	D

Result: 

A 

REPLACE EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY). Refer to  REMOVAL [12/2021 - ] 

Result: 

C 

See step  5

Result: 

D 

GO TO BACKUP BOOST CONVERTER CIRCUIT. Refer to  Backup Boost Converter Circuit [12/2021 - 10/2023]  

Result: 

B 

See step  2

1. Check if the connector of the external backup boost converter (eco run vehicle converter assembly) is connected securely.

   OK

   The connector is securely connected.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CONNECT CONNECTOR CORRECTLY 

Result: 

OK 

See step  3

Pre-procedure1

• Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

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

  Standard Voltage

  Tester Connection	Condition	Specified Condition
  B42-11 (BIN) - Body ground	Always	9.5 to 14 V
  B42-3 (ACC) - Body ground	Ignition switch ACC	9.5 to 14 V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

Pre-procedure1

• Disconnect the engine stop and start ECU connector.
• Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition
  B38-19 (DON2) - B42-1 (DON2)	Always	Below 1 Ω
  B38-19 (DON2) - Body ground	Always	10 kΩ or higher
  B42-1 (DON2) - Body ground	Always	10 kΩ or higher

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

Pre-procedure1

• Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.
• Remove the PA-BBC fuse from the NO. 1 engine room relay block and junction block assembly.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition
  B42-11 (BIN) - PA-BBC fuse terminal 2	Always	Below 1 Ω
  B42-3 (ACC) - ECU-ACC fuse terminal	Always	Below 1 Ω
  B42-11 (BIN) - Body ground	Always	10 kΩ or higher
  PA-BBC fuse terminal 2 - Body ground	Always	10 kΩ or higher
  B42-3 (ACC) - Body ground	Always	10 kΩ or higher

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY). Refer to  REMOVAL [12/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR