RM38T0EC _51 Engine / Hybrid System _115233 STOP AND START _0510781 STOP AND START SYSTEM C

STOP AND START  STOP AND START SYSTEM  P0C2B15  Auxiliary Transmission Fluid Pump Control Module Feedback Signal Circuit Short to Battery or Open  


DESCRIPTION

Refer to DTC P0C2B11.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>P0C2B11

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
P0C2B15 Auxiliary Transmission Fluid Pump Control Module Feedback Signal Circuit Short to Battery or Open Both of the following conditions are met for 1 second or more (2 trip detection logic):
·

Engine started

·

Oil pump with motor assembly circuit malfunction (Oil pump motor relay in the engine stop and start ECU stuck off, open or short to ground in the OP21, OPM1 or NOPM circuit or an open in the GND circuit)


·

Wire harness or connector

·

Oil pump with motor assembly

·

Engine stop and start ECU


Blinks SAE Code: P0C2E

CONFIRMATION DRIVING PATTERN

CONFIRMATION AFTER TROUBLESHOOTING


HINT:
·

If the cable is disconnected from the auxiliary 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 auxiliary 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 auxiliary 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.

Clear the DTCs.

Powertrain > Stop and Start > Clear DTCs
50002 392

b.

Start the engine and warm it up.


c.

Drive the vehicle at 7 km/h (4.3 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.

Keep the engine stopped 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.


g.

Check that no DTCs are output.

Powertrain > Stop and Start > Trouble Codes
50001 392


STOP AND START SYSTEM OPERATION CHECK


Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>OPERATION CHECK


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, perform learning of the external backup boost converter (eco run vehicle converter assembly).

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

·

Bleed the oil pump with motor assembly after replacing the continuously variable transaxle assembly or replacing the CVT fluid.

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.



PROCEDURE

1.PERFORM ACTIVE TEST USING GTS (OIL PUMP)
a.

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)



b.

Turn the ignition switch to ON.

HINT:

Do not start the engine.



c.

Enter the following menus.

Powertrain > Stop and Start > Active Test
Tester Display
Oil Pump
50004 392 42020

d.

Check the operating sound of the oil pump with motor assembly while performing the Active Test.

Standard:
Oil Pump Result
ON Operating sound can be heard
OFF Operating sound cannot be heard



Result:
Proceed to
OK
NG



OK

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

NG

5.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP WITH MOTOR ASSEMBLY)
2.CHECK ENGINE STOP AND START ECU (NOPM TERMINAL WAVEFORM)
A471731C13
3.24,0.615 3.698,0.854 0.458,0.24 2.74,2.094 2.958,1.333 true 4,2.073 3.75,1.229 true 2.573,2.135 3.354,2.333 0.781,0.198 10 false NOPM 3.302,0.646 3.677,0.844 0.375,0.198 10 false A169 0.104,0.073 0.885,0.271 0.781,0.198 10 false *a 3.875,2.094 4.531,2.281 0.656,0.188 10 false DGND
*a Component with harness connected
(Engine Stop and Start ECU) 		- -


a.

Connect an oscilloscope to terminals NOPM and DGND of the engine stop and start ECU connector.


b.

Turn the ignition switch to ON.

HINT:

Do not start the engine.



c.

Enter the following menus.

Powertrain > Stop and Start > Active Test
Tester Display
Oil Pump
50004 392 42020

d.
A112562E20
2.844,1.219 3.156,1.375 0.313,0.156 10 false GND

Check the waveform while performing the Active Test.

Item Condition
Tester Connection A169-27 (NOPM) - A169-6 (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:
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

3.CHECK OIL PUMP WITH MOTOR ASSEMBLY (OPST TERMINAL VOLTAGE)
3.CHECK OIL PUMP WITH MOTOR ASSEMBLY (OPST TERMINAL VOLTAGE)
a.

Disconnect the C134 oil pump with motor assembly connector.


b.

Turn the ignition switch to ON.


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
C134-2 (OPST) - C134-1 (GND) Ignition switch ON 10 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE OIL PUMP WITH MOTOR ASSEMBLY (CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY)

When Not Using the Engine Support Bridge:

Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY (When Not Using the Engine Support Bridge)>REMOVAL

When Using the Engine Support Bridge:

Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY (When Using the Engine Support Bridge)>REMOVAL



NG

4.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP WITH MOTOR ASSEMBLY)
4.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP WITH MOTOR ASSEMBLY)
a.

Disconnect the A169 engine stop and start ECU connector.


b.

Disconnect the C134 oil pump with motor assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A169-27 (NOPM) - C134-2 (OPST) Always Below 1 Ω
A169-27 (NOPM) - Body ground and other terminals Always 10 kΩ or higher
C134-2 (OPST) - Body ground and other terminals 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

5.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP WITH MOTOR ASSEMBLY)
a.

Disconnect the A168 engine stop and start ECU connector.


b.

Disconnect the C134 oil pump with motor assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A168-6 (OP21) - C134-4 (+B) Always Below 1 Ω
A168-6 (OP21) - Body ground and other terminals Always 10 kΩ or higher
C134-4 (+B) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (OIL PUMP WITH MOTOR ASSEMBLY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (OIL PUMP WITH MOTOR ASSEMBLY - BODY GROUND)
a.

Disconnect the C134 oil pump with motor assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
C134-1 (GND) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

7.CHECK ENGINE STOP AND START ECU (OP21 TERMINAL VOLTAGE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK ENGINE STOP AND START ECU (OP21 TERMINAL VOLTAGE)
A471731C14
3.281,0.5 3.698,0.75 0.417,0.25 2.042,0.5 2.458,0.75 0.417,0.25 4.031,2.188 3.74,1.208 true 2.667,2.198 2.198,1.479 true 2.656,2.24 3.438,2.438 0.781,0.198 10 false OP21 3.875,2.24 4.531,2.427 0.656,0.188 10 false DGND 3.323,0.542 3.698,0.74 0.375,0.198 10 false A169 0.135,0.094 0.49,0.375 0.354,0.281 10 false *a 2.104,0.542 2.479,0.74 0.375,0.198 10 false A168
*a Component with harness connected
(Engine Stop and Start ECU) 		- -


a.

Disconnect the C134 oil pump with motor assembly connector.


b.

Turn the ignition switch to ON.

HINT:

Do not start the engine.



c.

Enter the following menus.

Powertrain > Stop and Start > Active Test
Tester Display
Oil Pump
50004 392 42020

d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A168-6 (OP21) - A169-6 (DGND)
·

Ignition switch ON (engine is stopped)

·

Active Test "Oil Pump" being performed


10.5 to 16 V



Result:
Proceed to
OK
NG



OK

8.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP WITH MOTOR ASSEMBLY)

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 - OIL PUMP WITH MOTOR ASSEMBLY)
a.

Disconnect the A169 engine stop and start ECU connector.


b.

Disconnect the C134 oil pump with motor assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A169-9 (OPM1) - C134-3 (SI) Always Below 1 Ω
A169-9 (OPM1) - Body ground and other terminals Always 10 kΩ or higher
C134-3 (SI) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

9.CHECK OIL PUMP WITH MOTOR ASSEMBLY (OPM1 TERMINAL WAVEFORM)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.CHECK OIL PUMP WITH MOTOR ASSEMBLY (OPM1 TERMINAL WAVEFORM)
a.

Connect an oscilloscope to the OPM1 and DGND terminals of the engine stop and start ECU connector.

A471731C15
3.271,0.5 3.688,0.75 0.417,0.25 4.031,2.188 3.74,1.208 true 2.667,2.198 3.031,1.208 true 2.354,2.24 3.135,2.438 0.781,0.198 10 false OPM1 3.875,2.24 4.531,2.427 0.656,0.188 10 false DGND 3.323,0.542 3.698,0.74 0.375,0.198 10 false A169 0.135,0.094 0.49,0.375 0.354,0.281 10 false *a
*a Component with harness connected
(Engine Stop and Start ECU) 		- -



b.

Turn the ignition switch to ON.

HINT:

Do not start the engine.



c.

Enter the following menus.

Powertrain > Stop and Start > Active Test
Tester Display
Oil Pump
50004 392 42020

d.
A329962E12
2.885,1.25 3.344,1.448 0.458,0.198 10 false GND

Check the waveform while performing the Active Test.

Item Condition
Tester Connection A169-9 (OPM1) - A169-6 (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:
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

REPLACE OIL PUMP WITH MOTOR ASSEMBLY (CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY)

When Not Using the Engine Support Bridge:

Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY (When Not Using the Engine Support Bridge)>REMOVAL

When Using the Engine Support Bridge:

Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY (When Using the Engine Support Bridge)>REMOVAL