RM35X0E _51 Engine / Hybrid System _078825 STOP AND START _0382334 STOP AND START SYSTEM C

STOP AND START  STOP AND START SYSTEM  P094296  Hydraulic Pressure Unit Component Internal Failure  


DESCRIPTION

HINT:

This DTC is applicable to Automatic Transmission models only.


Refer to DTC P279612.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>P279612

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory Note
P094296 Hydraulic Pressure Unit Component Internal Failure The following condition continues for 0.032 seconds or more (2 trip detection logic):
·

Difference between turbine speed and output shaft speed is 330 rpm or more within 0.2 seconds after engine restarted during idling stop when shift lever is in D.


·

Electromagnetic oil pump

·

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 (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.



a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Clear the DTCs.

Powertrain > Stop and Start > Clear DTCs
50002 392

e.

Start the engine and warm it up.


f.

Drive the vehicle at 7 km/h (4 mph) or more.

CAUTION:

When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.



g.

Depress the brake pedal and stop the vehicle.


h.

Keep the engine stopped by stop and start control. (Keep the shift lever in D.)


i.

Release the brake pedal with the shift lever in D to start the engine.


j.

Check that no DTCs are 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.



a.

Start the engine and warm it up.


b.

Turn the air conditioning system off.


c.

Drive the vehicle at 7 km/h (4 mph) or more.

CAUTION:

When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.



d.

Depress the brake pedal and stop the vehicle.


e.

Allow the engine to stop by stop and start control. (Keep the shift lever in D.)


f.

Release the brake pedal with the shift lever in D to start the engine.



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.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION

·

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.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION

·

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.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION

·

When the engine stop and start ECU or electromagnetic oil pump is replaced, check the electromagnetic oil pump.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION



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.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>FREEZE FRAME DATA

·

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.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>DTC CHECK / CLEAR



PROCEDURE

1.CHECK ENGINE STOP AND START ECU (EGND AND GND TERMINAL WAVEFORM)
a.

Drive the vehicle to warm up the engine and automatic transmission fluid.

HINT:

The electromagnetic oil pump may not operate properly if the automatic transmission fluid temperature is low. Make sure to warm up the automatic transmission fluid before performing the Active Test. (Automatic transmission fluid temperature: 25°C (77°F) or higher)



b.

Connect the GTS to the DLC3.


c.

Turn the ignition switch to ON.

HINT:

Do not start the engine.



d.

Turn the GTS on.


e.

Connect an oscilloscope to the EGND and GND1 terminals of the engine stop and start ECU connector.

A511916C01
4.635,0.615 5.156,0.844 0.521,0.229 2.01,0.594 2.531,0.823 0.521,0.229 4.792,1.448 5.385,2.104 true 1.865,1.417 1.365,2.115 true 5.24,2.177 5.854,2.375 0.615,0.198 10 false EGND 4.76,0.656 5.219,0.854 0.458,0.198 10 false N33 0.104,0.083 0.417,0.281 0.313,0.198 10 false *a 1.156,2.177 1.771,2.375 0.615,0.198 10 false GND1 2.135,0.635 2.594,0.833 0.458,0.198 10 false N31
*a Component with harness connected
(Engine Stop and Start ECU) 		- -



f.

Enter the following menus: Powertrain / Stop and Start / Active Test / Electromagnetic Oil Pump.

Powertrain > Stop and Start > Active Test
Tester Display
Electromagnetic Oil Pump
50004 392 42015

g.
A345972E01
0.115,0.115 1.49,0.313 1.375,0.198 10 false 10 V/DIV. 1.281,1.896 2.052,2.094 0.771,0.198 10 false 20 ms./DIV. 0.115,1.396 0.573,1.594 0.458,0.198 10 false GND 0.219,1.135 0.531,1.333 0.313,0.198 10 false +B 0.104,0.875 0.719,1.073 0.615,0.198 10 false 43 V

Check the waveform while performing the Active Test.

Item Condition
Tester Connection N33-8 (EGND) - N31-8 (GND1)
Tool Setting 10 V/DIV., 20 ms./DIV.
Condition
·

Ignition switch ON (engine is stopped)

·

Active Test "Electromagnetic Oil Pump" being performed



Standard:

The waveform is similar to that shown in the illustration.


Result:
Proceed to
OK
NG




OK

2.CLEAR DTC

NG

REPLACE ELECTROMAGNETIC OIL PUMP

Click hereDrivetrain>AC60E (AUTOMATIC TRANSMISSION / TRANSAXLE)>VALVE BODY ASSEMBLY>DISASSEMBLY


2.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Stop and Start / Trouble Codes.


e.

Clear the DTCs.

Powertrain > Stop and Start > Clear DTCs
50002 392

Result:
Proceed to
NEXT



NEXT

3.CHECK DTC OUTPUT
3.CHECK DTC OUTPUT
a.

Start the engine.


b.

Perform a road test.


c.

Enter the following menus: Powertrain / Stop and Start / Trouble Codes.


d.

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

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL


B

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING