DTC P33B3-00: External BBC Circuit [11/2021 - 03/2023]: 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
   Overvoltage
   Overload	C

Result: 

A 

REPLACE EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY). Refer to  REMOVAL [11/2021 - 03/2024] 

Result: 

C 

GO TO BACKUP BOOST CONVERTER CIRCUIT. Refer to  Backup Boost Converter Circuit [11/2021 - 03/2023] 

Result: 

B 

See step  2

1. Using the GTS, read the values displayed in the Freeze Frame Data.

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

   Tester Display
   Stop&Start Operating Permission (Minimum Voltage (Starter Solenoid Engagement))

   Standard

   GTS Display	Specified Condit
   Stop&Start Operating Permission (Minimum Voltage (Starter Solenoid Engagement))	7.6 V or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CHARGE OR REPLACE BATTERY AFTER CHECKING BATTERY STATE 

Result: 

OK 

See step  3

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  4

1. Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A9-11 (BIN) - Body ground	Always	9.5 to 14 V
   A9-3 (ACC) - Body ground	Ignition switch ACC	9.5 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Disconnect the engine stop and start ECU connector.
2. Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A29-19 (DON2) - A9-1 (DON2)	Always	Below 1 Ω
   A29-19 (DON2) - Body ground	Always	10 kΩ or higher
   A9-1 (DON2) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.
2. Remove the AMP NO. 2 fuse from the No. 1 engine room relay block and No. 1 junction block assembly.
3. Disconnect the power distribution box assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A9-11 (BIN) - AMP NO. 2 fuse terminal 2	Always	Below 1 Ω
   A9-3 (ACC) - 9G-11	Always	Below 1 Ω
   A9-11 (BIN) - Body ground	Always	10 kΩ or higher
   AMP NO. 2 fuse terminal 2 - Body ground	Always	10 kΩ or higher
   A9-3 (ACC) - Body ground	Always	10 kΩ or higher
   +BA NO. 2 fuse terminal 2 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY). Refer to  REMOVAL [11/2021 - 03/2024] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR