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

STOP AND START  STOP AND START SYSTEM  P279614  Electromagnetic Oil Pump Circuit Open  


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
P279614 Electromagnetic Oil Pump Circuit Open Both of the following conditions are met for 0.16 seconds or more (2 trip detection logic):
·

During electromagnetic oil pump preliminary check: First time vehicle speed reaches 2 km/h (1.2 mph) or higher once per driving cycle (Tr1: On, Tr2: Off).

·

EGND terminal voltage below 1 V.


·

Wire harness or connector

·

Transmission wire

·

Electromagnetic oil pump

·

Engine stop and start ECU


Blinks DTC stored SAE Code: P2798

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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P279614)
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.

Read the DTCs

Powertrain > Stop and Start > Trouble Codes
50001 392
Result:
Result Proceed to
DTC P279614 is output A
DTCs P279614 and P323A19 are output B




A

2.CHECK ENGINE STOP AND START ECU (EGND TERMINAL WAVEFORM)

B

10.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)
2.CHECK ENGINE STOP AND START ECU (EGND TERMINAL WAVEFORM)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.

HINT:

Do not start the engine.



c.

Turn the GTS on.


d.

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

A419453
4.677,0.49 5.125,0.76 0.448,0.271 2.052,0.5 2.5,0.771 0.448,0.271 4.813,2.177 4.781,1.448 true 1.729,2.167 1.865,1.448 true 4.635,2.229 5.292,2.417 0.656,0.188 10 false EGND 4.781,0.542 5.156,0.74 0.375,0.198 10 false N33 0.104,0.073 0.885,0.271 0.781,0.198 10 false *a 2.156,0.552 2.531,0.75 0.375,0.198 10 false N31 1.531,2.229 2.188,2.417 0.656,0.188 10 false GND1
*a Component with harness connected
(Engine Stop and Start ECU) 		- -



e.

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

f.
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:
Result Proceed to
Constant value below 1 V A
Constant value between 10 to 14 V B
Waveform output as in illustration C



A

3.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)

B

REPLACE ENGINE STOP AND START ECU

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


C

USE SIMULATION METHOD TO CHECK

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


3.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)
A419453
4.677,0.49 5.125,0.76 0.448,0.271 4.542,2.229 4.781,1.448 true 4.344,2.26 5,2.448 0.656,0.188 10 false EGND 4.781,0.542 5.156,0.74 0.375,0.198 10 false N33 0.104,0.073 0.885,0.271 0.781,0.198 10 false *a
*a Component with harness connected
(Engine Stop and Start ECU) 		- -


a.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N33-8 (EGND) - Body ground Ignition switch off 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.CHECK TERMINAL VOLTAGE (EMP+ TERMINAL)

NG

8.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)
4.CHECK TERMINAL VOLTAGE (EMP+ TERMINAL)
A350141
1.49,0.146 1.917,0.427 0.427,0.281 1.885,1.26 1.802,1.76 true 0.083,0.063 0.396,0.26 0.313,0.198 10 false *a 1.583,0.208 1.979,0.396 0.396,0.188 10 false E29 1.448,1.813 2.313,2.01 0.865,0.198 10 false EMP+
*a Front view of wire harness connector
(to Transmission Wire)


a.

Disconnect the transmission wire connector.


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.

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

f.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
E29-17 (EMP+) - Body ground
·

Ignition switch ON (engine is stopped)

·

Active Test "Electromagnetic Oil Pump" being performed


10 to 14 V



Result:
Proceed to
OK
NG



OK

5.INSPECT TRANSMISSION WIRE (ELECTROMAGNETIC OIL PUMP)

NG

7.CHECK TERMINAL VOLTAGE (EMOP TERMINAL)
5.INSPECT TRANSMISSION WIRE (ELECTROMAGNETIC OIL PUMP)
a.

Disconnect the transmission wire connector.


b.
C319326
0.719,1.74 1.51,1.115 true 1.927,1.813 1.573,1.344 true 0.156,0.104 0.469,0.302 0.313,0.198 10 false *a 0.521,1.802 0.99,2 0.469,0.198 10 false EMP+ 1.802,1.865 2.271,2.125 0.469,0.26 10 false EMP-
*a Component without harness connected
(Transmission Wire)


Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
17 (EMP+) - 27 (EMP-) 20°C (68°F) 5.0 to 5.6 Ω



Result:
Proceed to
OK
NG



OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE)

NG

6.INSPECT ELECTROMAGNETIC OIL PUMP
7.CHECK TERMINAL VOLTAGE (EMOP TERMINAL)
A419453
4.688,0.49 5.135,0.76 0.448,0.271 4.458,2.229 4.698,1.448 true 4.25,2.26 4.906,2.448 0.656,0.188 10 false EMOP 4.792,0.542 5.167,0.74 0.375,0.198 10 false N33 0.104,0.073 0.885,0.271 0.781,0.198 10 false *a
*a Component with harness connected
(Engine Stop and Start ECU) 		- -


a.

Disconnect the transmission wire connector.


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.

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

f.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
N33-9 (EMOP) - Body ground
·

Ignition switch ON (engine is stopped)

·

Active Test "Electromagnetic Oil Pump" being performed


10 to 14 V



Result:
Proceed to
OK
NG



OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE)

NG

REPLACE ENGINE STOP AND START ECU

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


8.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)
a.

Disconnect the engine stop and start ECU connector.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N33-8 (EGND) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE ENGINE STOP AND START ECU

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


NG

9.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE)
9.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE)
a.

Disconnect the engine stop and start ECU connector.


b.

Disconnect the transmission wire connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N33-8 (EGND) or E29-27 (EMP-) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE TRANSMISSION WIRE

Click hereDrivetrain>AC60E (AUTOMATIC TRANSMISSION / TRANSAXLE)>TRANSMISSION WIRE>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)
A419453
4.688,0.49 5.135,0.76 0.448,0.271 4.458,2.229 4.698,1.448 true 4.25,2.26 4.906,2.448 0.656,0.188 10 false EMOP 4.792,0.542 5.167,0.74 0.375,0.198 10 false N33 0.104,0.073 0.885,0.271 0.781,0.198 10 false *a
*a Component with harness connected
(Engine Stop and Start ECU) 		- -


a.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N33-9 (EMOP) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

11.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE)

NG

15.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)
11.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE)
A436064
1.51,0.396 2,0.698 0.49,0.302 1.906,1.344 1.479,1.833 true 2,1.313 2.344,1.844 true 1.625,0.469 2.167,0.656 0.542,0.188 10 false N33 0.094,0.104 0.406,0.302 0.313,0.198 10 false *a 1.313,1.917 1.927,2.115 0.615,0.198 10 false EGND 2.188,1.917 2.802,2.115 0.615,0.198 10 false EMOP
*a Front view of wire harness connector
(to Engine Stop and Start ECU)


a.

Disconnect the engine stop and start ECU connector.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N33-9 (EMOP) - N33-8 (EGND) 20°C (68°F) 5.0 to 5.6 Ω



Result:
Proceed to
OK
NG



OK

12.CHECK ENGINE STOP AND START ECU

NG

13.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE)
12.CHECK ENGINE STOP AND START ECU
A436065
4.969,0.521 5.438,0.802 0.469,0.281 4.427,2.188 4.938,1.406 true 5.333,2.188 5.042,1.406 true 5.146,2.25 5.76,2.448 0.615,0.198 10 false EGND 4.229,2.24 4.844,2.438 0.615,0.198 10 false EMOP 5.073,0.583 5.688,0.781 0.615,0.198 10 false N33 0.094,0.073 0.406,0.271 0.313,0.198 10 false *a
*a Component without harness connected
(Engine Stop and Start ECU) 		- -


a.

Disconnect the engine stop and start ECU connector.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N33-9 (EMOP) - N33-8 (EGND) Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

GO TO DTC P323A19

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>P323A19


NG

REPLACE ENGINE STOP AND START ECU

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


13.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE)
a.

Disconnect the engine stop and start ECU connector.


b.

Disconnect the transmission wire connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N33-8 (EGND) - E29-27 (EMP-) Always Below 1 Ω
N33-9 (EMOP) - E29-17 (EMP+) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

14.INSPECT ELECTROMAGNETIC OIL PUMP

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)
A419453
4.688,0.49 5.135,0.76 0.448,0.271 4.458,2.229 4.698,1.448 true 4.25,2.26 4.906,2.448 0.656,0.188 10 false EMOP 4.792,0.542 5.167,0.74 0.375,0.198 10 false N33 0.104,0.073 0.885,0.271 0.781,0.198 10 false *a
*a Component with harness connected
(Engine Stop and Start ECU) 		- -


a.

Disconnect the transmission wire connector.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N33-9 (EMOP) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE TRANSMISSION WIRE

Click hereDrivetrain>AC60E (AUTOMATIC TRANSMISSION / TRANSAXLE)>TRANSMISSION WIRE>REMOVAL


NG

16.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE)
16.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE)
a.

Disconnect the engine stop and start ECU connector.


b.

Disconnect the transmission wire connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N33-9 (EMOP) or E29-17 (EMP+) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE ENGINE STOP AND START ECU

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR