STOP AND START STOP AND START SYSTEM P30DF62 Backup Boost Converter Circuit Board(Thermistor) Signal Compare Failure P30EF4B Backup Boost Converter Circuit Board Over Temperature P323A00 Backup Boost Converter "A" P323A16 Backup Boost Converter "A" Circuit Voltage Below Threshold P323AA2 Backup Boost Converter "A" System Voltage Low P323B29 Backup Boost Converter "A" Control Circuit Signal Invalid P323B38 Backup Boost Converter "A" Control Circuit Signal Cycle Invalid
DESCRIPTION
Refer to DTC P323A19.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Memory | Note |
|---|---|---|---|---|---|---|
| P30DF62 | Backup Boost Converter Circuit Board(Thermistor) Signal Compare Failure | The following condition is met for 1 second or more (1 trip detection logic):
·
Difference in temperature between thermistor 1 and thermistor 2 of the engine stop and start ECU is 40°C (72°F) or higher. |
·
Wire harness or connector ·
Battery ·
BBC-1 fuse ·
BBC-2 fuse ·
Engine stop and start ECU |
Blinks | DTC stored | SAE Code: P30DF |
| P30EF4B | Backup Boost Converter Circuit Board Over Temperature | The following condition is met for 1 second or more (1 trip detection logic):
·
Engine stop and start ECU thermistor temperature is 135°C (275°F) or higher. |
·
Wire harness or connector ·
Battery ·
BBC-1 fuse ·
BBC-2 fuse ·
Engine stop and start ECU |
Blinks | DTC stored | SAE Code: P30EF |
| P323A00 | Backup Boost Converter "A" | The following condition is met for 1 second or more (1 trip detection logic):
·
Backup boost converter malfunction is detected. |
·
Wire harness or connector ·
Battery ·
BBC-1 fuse ·
BBC-2 fuse ·
Engine stop and start ECU |
Blinks | DTC stored | SAE Code: P323A |
| P323A16 | Backup Boost Converter "A" Circuit Voltage Below Threshold | One of the following conditions is met for 1 second or more (1 trip detection logic):
·
B41 or IG41 voltage is 6.0 V or less and backup boost converter output overcurrent is not detected. ·
B42 or B43 voltage is 6.0 V or less, backup boost converter is not overheating and backup boost converter output overcurrent is not detected. |
·
Wire harness or connector ·
Battery ·
BBC-1 fuse ·
BBC-2 fuse ·
Engine stop and start ECU |
Blinks | DTC stored | SAE Code: P323A |
| P323AA2 | Backup Boost Converter "A" System Voltage Low | The following condition is met for 1 second or more (1 trip detection logic):
·
Backup boost converter malfunction is detected. |
·
Wire harness or connector ·
Battery ·
BBC-1 fuse ·
BBC-2 fuse ·
Engine stop and start ECU |
Blinks | DTC stored | SAE Code: P323A |
| P323B29 | Backup Boost Converter "A" Control Circuit Signal Invalid | The following condition is met for 1 second or more (1 trip detection logic):
·
Backup boost converter malfunction is detected. |
·
Wire harness or connector ·
Battery ·
BBC-1 fuse ·
BBC-2 fuse ·
Engine stop and start ECU |
Blinks | DTC stored | SAE Code: P323C |
| P323B38 | Backup Boost Converter "A" Control Circuit Signal Cycle Invalid | The following condition is met for 1 second or more (1 trip detection logic):
·
Backup boost converter malfunction is detected. |
·
Wire harness or connector ·
Battery ·
BBC-1 fuse ·
BBC-2 fuse ·
Engine stop and start ECU |
Blinks | DTC stored | SAE Code: P323C |
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 (51°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.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
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 mph) or more.
- CAUTION:
-
When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.
for Automatic Transmission:
Depress the brake pedal and stop the vehicle.
for Manual Transmission:
Stop the vehicle, move the shift lever to neutral and release the clutch pedal.
Keep the engine stopped by stop and start control for 1 second or more. (for Automatic Transmission: Keep the shift lever in D.)
for Automatic Transmission:
Release the brake pedal with the shift lever in D to start the engine.
for Manual Transmission:
Depress the clutch pedal and 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
- 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 (51°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.
Start the engine and warm it up.
Turn the air conditioning system off.
Drive the vehicle at 7 km/h (4 mph) or more.
- CAUTION:
-
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
for Automatic Transmission:
Depress the brake pedal and stop the vehicle.
for Manual Transmission:
Stop the vehicle, move the shift lever to neutral and release the clutch pedal.
Allow the engine to stop by stop and start control. (for Automatic Transmission: Keep the shift lever in D.)
for Automatic Transmission:
Release the brake pedal with the shift lever in D to start the engine.
for Manual Transmission:
Depress the clutch pedal and start the engine.
WIRING DIAGRAM
Refer to DTC P323A19.
CAUTION / NOTICE / HINT
- NOTICE:
- ·
Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.
·After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.
·After replacing the engine stop and start ECU or airbag sensor assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.
·for Automatic Transmission:
When the engine stop and start ECU or electromagnetic oil pump is replaced, check the electromagnetic oil pump.
·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
| *a | Front view of wire harness connector
(to Engine Stop and Start ECU) |
Disconnect the engine stop and start ECU connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition N31-1 (BIN2) - Body ground Always 9.5 to 14 V N31-3 (BIN1) - Body ground Always 9.5 to 14 V
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Engine Stop and Start ECU) |
Disconnect the engine stop and start ECU connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition N33-21 (IG1) - Body ground Ignition switch ON 9.5 to 14 V
- Result:
Proceed to OK NG
OK
NG
Disconnect the engine stop and start ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N32-6 (DGND) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the engine stop and start ECU connector.
Disconnect the door control receiver connector.*1
Disconnect the inner rear view mirror assembly connector.*2
Disconnect the No. 1 integration relay (DOME CUT NO.2 relay) connector.
Disconnect the Parking Assist ECU.*3*9
Disconnect the tire pressure warning ECU and receiver connector.*4
Disconnect the NO. 1 interior illumination light assembly (slide door illumination) connector.
Disconnect the NO. 2 interior illumination light assembly (slide door illumination) connector.
Disconnect the NO. 1 interior illumination light assembly (quarter trim illumination) connector.
Disconnect the NO. 2 interior illumination light assembly (quarter trim illumination) connector.
Disconnect the spot light assembly (for front LH) connector.
Disconnect the spot light assembly (for rear LH) connector.
Disconnect the spot light assembly (for front RH) connector.
Disconnect the spot light assembly (for rear RH) connector.
Disconnect the radio and display receiver assembly connector.
Disconnect the navigation ECU connector.*5
Disconnect the network gateway ECU connector.
Disconnect the instrument panel junction block assembly (main body ECU (multiplex network body ECU)) connector.
Disconnect the millimeter wave radar sensor assembly connector.*6
Disconnect the inner rear view mirror assembly connector.*7
Disconnect the blind spot monitor sensor LH connector.*8
Disconnect the blind spot monitor sensor RH connector.*8
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N33-2 (B41) - b2-5 (+B)*1 Always Below 1 Ω N33-2 (B41) - a5-6 (+B)*2 Always Below 1 Ω N33-2 (B41) - 1C-7 Always Below 1 Ω N33-2 (B41) - 1C-8 Always Below 1 Ω N33-2 (B41) - N151-1(+B)*3*9 Always Below 1 Ω N33-2 (B41) - N151-19(+B2)*3*9 Always Below 1 Ω N33-2 (B41) - Z30-7(+B)*4 Always Below 1 Ω N33-2 (B41) - U10-1(ILL+) Always Below 1 Ω N33-2 (B41) - U12-1(ILL+) Always Below 1 Ω N33-2 (B41) - W31-1(ILL+) Always Below 1 Ω N33-2 (B41) - V29-1(ILL+) Always Below 1 Ω N33-2 (B41) - a26-5(+) Always Below 1 Ω N33-2 (B41) - a25-5(+) Always Below 1 Ω N33-2 (B41) - a35-5(+) Always Below 1 Ω N33-2 (B41) - a34-5(+) Always Below 1 Ω N33-12 (B42) - O5-4 (+B1) Always Below 1 Ω N33-11 (B43) - O9-10 (+B)*5 Always Below 1 Ω N33-3 (IG41) - N21-11 (IG1) Always Below 1 Ω N33-3 (IG41) - 3A-15 Always Below 1 Ω N33-3 (IG41) - A3-8 (IGB)*6 Always Below 1 Ω N33-3 (IG41) - N151-21(IG)*3*9 Always Below 1 Ω N33-3 (IG41) - a7-6(IG)*7 Always Below 1 Ω N33-3 (IG41) - e2-5(BLB)*8 Always Below 1 Ω N33-3 (IG41) - e3-5(BRB)*8 Always Below 1 Ω N33-3 (IG41) - Z30-1(IG)*4 Always Below 1 Ω N33-2 (B41) - Body ground and other terminals Always 10 kΩ or higher N33-12 (B42) - Body ground and other terminals Always 10 kΩ or higher N33-11 (B43) - Body ground and other terminals Always 10 kΩ or higher N33-3 (IG41) - Body ground and other terminals Always 10 kΩ or higher
*1: w/ Wireless Door Lock Control System
*2: w/ Digital Rear-View Mirror System
*3: w/ Panoramic view monitor system
*4: w/ Tire Pressure Warning System
*5: w/ Navigation System
*6: w/ Front Radar Sensor System
*7: w/ Rear View Mirror System
*8: w/ Blind Spot Monitor System
*9: Production date from 2019/06 to 2023/10
- Result:
Proceed to OK NG
OK
NG