STOP AND START STOP AND START SYSTEM P33B300 External BBC Circuit
DESCRIPTION
When the engine is started (high electrical load) from engine stopped by the stop and start control, the external backup boost converter (eco run vehicle converter assembly) supplements battery voltage in order to prevent the function from being disabled due to decrease in power source voltage supplied to the active noise control system.
After receiving a request from the engine stop and start ECU, the external backup boost converter (eco run vehicle converter assembly) helps maintain the power source voltage if the battery voltage drops due to the high electrical load when the engine is restarted by stop and start control. The DON2 terminal of the external backup boost converter (eco run vehicle converter assembly) receives power supply voltage supplement requests from the engine stop and start ECU and switches from idle mode to supplement mode.
When the engine is started by the stop and start control, if the external backup boost converter (eco run vehicle converter assembly) does not maintain the specified voltage, an error is sent to the engine stop and start ECU. Then, the engine stop and start ECU stores DTC P33B300, and the stop and start cancel indicator blinks.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| P33B300 | External BBC Circuit | Any of the following conditions are met for 1 second or more (1 trip detection logic):
·
External backup boost converter (eco run vehicle converter assembly) period malfunction ·
External backup boost converter (eco run vehicle converter assembly) internal power supply overvoltage ·
External backup boost converter (eco run vehicle converter assembly) internal power supply undervoltage ·
Overcurrent is detected in a load circuit connected to the external backup boost converter (eco run vehicle converter assembly) ·
External backup boost converter (eco run vehicle converter assembly) duty value malfunction |
·
External backup boost converter (eco run vehicle converter assembly) ·
Wire harness or connector ·
Battery ·
BBC NO. 3 fuse ·
ECU-ACC fuse |
Blinks | SAE Code: P33B3 |
CONFIRMATION DRIVING PATTERN
CONFIRMATION AFTER TROUBLESHOOTING
- HINT:
- ·
If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.
In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item "Status of Battery Charge Control" changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)
·If the GTS is not available and the Data List item "Status of Battery Charge Control" cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.
If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.
·After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.
·Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.
Clear the DTCs.
- Powertrain > Stop and Start > Clear DTCs
- 50002 392
Start the engine and warm it up.
Drive the vehicle at 7 km/h (4.3 mph) or more.
- CAUTION:
-
When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.
Depress the brake pedal and stop the vehicle.
Keep the engine stopped by stop and start control for 1 second or more. (Keep the shift lever in D.)
Release the brake pedal with the shift lever in D to start the engine.
- HINT:
-
If the engine cranks slowly when the engine is restarted, it can be determined that the battery voltage is low.
Check that DTCs are not output.
- Powertrain > Stop and Start > Trouble Codes
- 50001 392
STOP AND START SYSTEM OPERATION CHECK
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
-
Inspect the fuses for circuits related to this system before performing the following procedure.
- HINT:
- ·
DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.
·Using the GTS, read the Freeze Frame Data before troubleshooting. System condition information is recorded as Freeze Frame Data the moment a DTC is stored. This information can be useful when troubleshooting.
PROCEDURE
- NOTICE:
-
Clearing the DTC will also clear the Freeze Frame Data, so before clearing be sure to record the Freeze Frame Data.
Following the display on the GTS, check the Freeze Frame Data and read "State of External BBC" in the Freeze Frame Data when P33B300 was output.
- Powertrain > Stop and Start > DTC(P33B300) > Freeze Frame Data
-
Tester Display State of External BBC - 50040 392 280 P33B300
- Result:
Tester Display Proceed to Duty Err A Cycle Err Low Vol B Overvoltage Overload C
A
B
C
Using the GTS, read the values displayed in the Freeze Frame Data.
- Powertrain > Stop and Start > DTC(P33B300) > Freeze Frame Data
-
Tester Display Stop&Start Operating Permission (Minimum Voltage (Starter Solenoid Engagement)) - 50040 392 310 P33B300
- Standard:
GTS Display Specified Condit Stop&Start Operating Permission (Minimum Voltage (Starter Solenoid Engagement)) 8.7 V or higher
- Result:
Proceed to OK NG
OK
NG
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
OK
NG
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 Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100
Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=11,3
A100-11 (BIN) - Body ground Always 9.5 to 14 V A100-3 (ACC) - Body ground Ignition switch ACC 9.5 to 14 V
- Result:
Proceed to OK NG
OK
NG
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 Click Location & Routing(A106,A100)Location & Routingewd_type=routing;type=c,c;code=A106,A100
Click Connector(A106)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A106;pinno=19
Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=1
A106-19 (DON2) - A100-1 (DON2) Always Below 1 Ω A106-19 (DON2) - Body ground Always 10 kΩ or higher A100-1 (DON2) - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.
Remove the BBC NO. 3 fuse from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the power distribution box assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100
Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=11,3
A100-11 (BIN) - BBC NO. 3 fuse terminal 2 Always Below 1 Ω A100-3 (ACC) - 4B-12 Always Below 1 Ω A100-11 (BIN) - Body ground Always 10 kΩ or higher BBC NO. 3 fuse terminal 2 - Body ground Always 10 kΩ or higher A100-3 (ACC) - Body ground Always 10 kΩ or higher 4B-12 - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG