STOP AND START STOP AND START SYSTEM P055511 Brake Booster Pressure Sensor Circuit Short to Ground P055515 Brake Booster Pressure Sensor Circuit Short to Battery or Open
DESCRIPTION
The engine stop and start ECU determines changes in the brake booster assembly pressure based on the voltage signal received from the vacuum sensor assembly in the brake booster assembly.
If the engine stop and start ECU judges that the signal received from the vacuum sensor assembly is abnormal, it stores DTC P055511 or P055515 and blinks the stop and start cancel indicator light.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| P055511 | Brake Booster Pressure Sensor Circuit Short to Ground | Both of the following conditions are met for 2 seconds or more (1 trip detection logic):
·
Open or short in vacuum sensor assembly circuit ·
Ignition switch ON |
·
Vacuum sensor assembly ·
Engine stop and start ECU ·
Wire harness or connector |
Blinks | SAE Code: P0557 |
| P055515 | Brake Booster Pressure Sensor Circuit Short to Battery or Open | Both of the following conditions are met for 2 seconds or more (1 trip detection logic):
·
Open or short in vacuum sensor assembly circuit ·
Ignition switch ON |
·
Vacuum sensor assembly ·
Engine stop and start ECU ·
Wire harness or connector |
Blinks | SAE Code: P0558 |
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.
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 allow it to idle for 15 seconds or more.
Stop the engine and turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Stop and Start / Data List / Brake Boost Pressure.
- Powertrain > Stop and Start > Data List
-
Tester Display Brake Boost Pressure - 50003 392 215
While depressing the brake pedal several times, check that the Brake Boost Pressure value changes.
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:
- ·
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, perform learning of the external backup boost converter (eco run vehicle converter assembly).
- HINT:
- ·
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.
·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.
PROCEDURE
| *a | Component with harness connected
(Engine Stop and Start ECU) |
- | - |
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 Click Location & Routing(A106)Location & Routingewd_type=routing;type=c;code=A106
Click Connector(A106)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A106;pinno=13,3
A106-13 (PB) - A106-3 (BRE2) Ignition switch ON Higher than 0.6 V or below 4.7 V
- Result:
Proceed to OK NG
OK
NG
Disconnect the engine stop and start ECU connector.
Disconnect the vacuum sensor 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,A107)Location & Routingewd_type=routing;type=c,c;code=A106,A107
Click Connector(A106)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A106;pinno=13,14,3
Click Connector(A107)Engine Compartment>Engine Room Main Wire / Transmission Wire>Vacuum Sensor (Brake Booster Assembly)ewd_type=component;type=c;code=A107;pinno=2,3,1
A106-13 (PB) - A107-2 (PBA) Always Below 1 Ω A106-14 (BRVC) - A107-3 (VCA) Always Below 1 Ω A106-3 (BRE2) - A107-1 (E2A) Always Below 1 Ω A106-13 (PB) - Body ground Always 10 kΩ or higher A106-14 (BRVC) - Body ground Always 10 kΩ or higher A106-3 (BRE2) - Body ground Always 10 kΩ or higher A107-2 (PBA) - Body ground Always 10 kΩ or higher A107-3 (VCA) - Body ground Always 10 kΩ or higher A107-1 (E2A) - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Engine Stop and Start ECU) |
- | - |
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 Click Location & Routing(A106)Location & Routingewd_type=routing;type=c;code=A106
Click Connector(A106)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A106;pinno=14,3
A106-14 (BRVC) - A106-3 (BRE2) Ignition switch ON 4.75 to 5.25 V
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to NEXT
NEXT
Clear the DTCs.
- Powertrain > Stop and Start > Clear DTCs
- 50002 392
- Result:
Proceed to NEXT
NEXT
Check that no DTCs are output.
- Powertrain > Stop and Start > Trouble Codes
- 50001 392
- Result:
Result Proceed to DTCs are not output A DTC P055511 or P055515 is output B
A
B