STOP AND START STOP AND START SYSTEM P094296 Hydraulic Pressure Unit Component Internal Failure
DESCRIPTION
Refer to DTC P0C2B11.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Memory | Note |
|---|---|---|---|---|---|---|
| P094296 | Hydraulic Pressure Unit Component Internal Failure | 1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other
1.
With the shift lever in D, the engine is stopped by the stop and start system. 2.
The belt clamping pressure is below the standard value or synchronizer ring not engaged. 3.
2 seconds after engine stopped by stop and start system 4.
2 trip detection logic |
·
Oil pump with motor assembly ·
Engine stop and start ECU |
Blinks | DTC stored | SAE Code: P0942 |
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 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.
Depress the brake pedal and stop the vehicle.
Keep the engine stopped by stop and start control. (Keep the shift lever in D.)
Release the brake pedal with the shift lever in D to start the engine.
Check that no DTCs are output.
- Powertrain > Stop and Start > Trouble Codes
- 50001 392
STOP AND START SYSTEM OPERATION CHECK
WIRING DIAGRAM
Refer to DTC P0C2B11.
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 with ECU assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.
·Bleed the oil pump with motor assembly after removing and installing the continuously variable transaxle assembly or replacing the CVT fluid.
·After replacing the engine stop and start ECU assembly, 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
Drive the vehicle to warm up the engine and CVT fluid.
- HINT:
-
The oil pump with motor assembly may not operate properly if the CVT fluid temperature is low. Make sure to warm up the CVT fluid before performing the Active Test. (CVT fluid temperature: 25°C (77°F) or higher)
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
- HINT:
-
Do not start the engine.
Turn the GTS on.
Connect an oscilloscope to the NOPM and DGND terminals of the engine stop and start ECU connector.
| *a | Component with harness connected
(Engine Stop and Start ECU) |
- | - |
Enter the following menus: Powertrain / Stop and Start / Active Test / Oil Pump.
- Powertrain > Stop and Start > Active Test
-
Tester Display Oil Pump - 50004 392 42020
Check the waveform while performing the Active Test.
| Item | Condition |
|---|---|
| Tester Connection | A124-27 (NOPM) - A124-6 (DGND) |
| Tool Setting | 5 V/DIV., 5 ms./DIV. |
| Condition | ·
Ignition switch ON (engine is stopped) ·
Active Test "Oil Pump" being performed |
- Standard:
The waveform is similar to that shown in the illustration with no noise.
- Result:
Result Proceed to 17 to 200 Hz
(Normal Waveform)A Except 17 to 200 Hz
(Abnormal Waveform)B
- HINT:
- ·
17 Hz: Period is 59 ms (oil pump with motor assembly speed is approximately 510 rpm).
·200 Hz: Period is 5 ms (oil pump with motor assembly speed is approximately 6000 rpm).
·The higher the oil pump with motor assembly speed becomes, the shorter the wavelength.
A
B
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Stop and Start / Trouble Codes.
Clear the DTCs.
- Powertrain > Stop and Start > Clear DTCs
- 50002 392
- Result:
Proceed to NEXT
NEXT
Start the engine.
Perform a road test.
Enter the following menus: Powertrain / Stop and Start / Trouble Codes.
Read the DTCs.
- Powertrain > Stop and Start > Trouble Codes
- 50001 392
- Result:
Result Proceed to DTC P094296 is output A DTC P094296 is not output B
A
B