RM3660EC _51 Engine / Hybrid System _080777 NR Series ENGINE CONTROL _0393969 SFI SYSTEM C

NR Series ENGINE CONTROL  SFI SYSTEM  P25B372  Turbocharger/Supercharger Wastegate "A" Actuator Stuck Open  


DESCRIPTION

Refer to DTC P024313.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>P024313

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P25B372 Turbocharger/Supercharger Wastegate "A" Actuator Stuck Open The boost pressure does not increase despite control to close the waste gate valve (2 trip detection logic).
·

Turbocharger sub-assembly

·

Vacuum regulating valve assembly

·

Vacuum pump assembly

·

Vacuum line

·

No. 1 turbo pressure sensor

·

Mass air flow meter sub-assembly

·

Wire harness or connector

·

ECM


Comes on DTC stored SAE Code: P25B3

MONITOR DESCRIPTION

If the boost pressure does not increase despite control to close the waste gate valve, it is determined that there is a waste gate valve stuck open malfunction. The ECM illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Required Sensors/Components No. 1 turbo pressure sensor
Mass air flow meter sub-assembly
Frequency of Operation Once per driving cycle

CONFIRMATION DRIVING PATTERN

HINT:
·

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR

·

When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR



A335755E02
1.927,2.979 3.458,3.177 1.531,0.198 10 false Warming up 4.021,1.156 4.323,1.375 0.302,0.219 10 false [B] 4.563,0.969 4.865,1.188 0.302,0.219 10 false [C] 6.635,3.313 6.938,3.531 0.302,0.219 10 false [D] 1.063,2.375 2.594,2.573 1.531,0.198 10 false Idling 0.396,1.323 1.927,1.521 1.531,0.198 10 false 70 km/h or more 0.385,0.771 1.917,0.969 1.531,0.198 10 false 80 km/h or more 2.156,2.229 2.458,2.448 0.302,0.219 10 false [A] 0.49,0.396 2.021,0.594 1.531,0.198 10 false Vehicle Speed

1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON.

3.

Turn the GTS on.

4.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

5.

Turn the ignition switch off and wait for at least 30 seconds.

6.

Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].

7.

Turn the GTS on.

8.

Drive the vehicle at 70 km/h (43 mph) or more [B].

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.


9.

Accelerate to 80 km/h (50 mph) or more with the accelerator pedal fully depressed [C].

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.


10.

Enter the following menus: Powertrain / Engine / Trouble Codes [D].

11.

Read the pending DTCs.

HINT:
·

If a pending DTC is output, the system is malfunctioning.

·

If a pending DTC is not output, perform the following procedure.



12.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

13.

Input the DTC: P25B372.

14.

Check the DTC judgment result.

GTS Display Description
NORMAL
·

DTC judgment completed

·

System normal


ABNORMAL
·

DTC judgment completed

·

System abnormal


INCOMPLETE
·

DTC judgment not completed

·

Perform driving pattern after confirming DTC enabling conditions



HINT:
·

If the judgment result is NORMAL, the system is normal.

·

If the judgment result is ABNORMAL, the system is malfunctioning.

·

If the judgment result is INCOMPLETE, perform steps [B] through [D] again.

·

[A] to [D]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

·

When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.




WIRING DIAGRAM

·

Refer to DTC P010012 for the mass air flow meter sub-assembly circuit.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>P010012

·

Refer to DTC P023511 for No. 1 turbo pressure sensor circuit.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>P023511


CAUTION / NOTICE / HINT

HINT:

Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.


PROCEDURE

1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P25B372)
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 / Engine / Trouble Codes.


e.

Read the DTCs.

Powertrain > Engine > Trouble Codes
50001 372
Result:
Result Proceed to
DTC P25B372 is output A
DTC P25B372 and other DTCs are output B


HINT:

If any DTCs other than P25B372 are output, troubleshoot those DTCs first.




A

2.PERFORM ACTIVE TEST USING GTS (CONTROL THE WASTEGATE VALVE DUTY RATIO)

B

GO TO DTC CHART

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>DIAGNOSTIC TROUBLE CODE CHART


2.PERFORM ACTIVE TEST USING GTS (CONTROL THE WASTEGATE VALVE DUTY RATIO)
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 / Engine / Active Test / Control the Wastegate Valve Duty Ratio.

Powertrain > Engine > Active Test
Tester Display
Control the Wastegate Valve Duty Ratio
50004 372 13

e.

Perform the Active Test. Check that the waste gate valve is operating.

OK:

The electric waste gate valve is operating.



Result:
Proceed to
OK
NG



OK

3.INSPECT AIR BY-PASS VALVE ASSEMBLY

NG

18.PERFORM ACTIVE TEST USING GTS (CONTROL THE WASTEGATE VALVE DUTY RATIO)
3.INSPECT AIR BY-PASS VALVE ASSEMBLY
a.

Inspect the air by-pass valve assembly.

Click hereEngine / Hybrid System>NR Series (INTAKE / EXHAUST)>TURBOCHARGER>INSPECTION


Result:
Proceed to
OK
NG



OK

4.INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

NG

19.REPLACE TURBOCHARGER SUB-ASSEMBLY
4.INSPECT MASS AIR FLOW METER SUB-ASSEMBLY
a.

Inspect the mass air flow meter sub-assembly, referring to On-vehicle Inspection for Mass Air Flow Meter.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>MASS AIR FLOW METER>ON-VEHICLE INSPECTION


b.

Inspect the mass air flow meter sub-assembly, referring to Inspection for Mass Air Flow Meter.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>MASS AIR FLOW METER>INSPECTION


c.

Inspect the function of the mass air flow meter sub-assembly.

i.

Connect the GTS to the DLC3.


ii.

Start the engine.


iii.

Turn the GTS on.


iv.

Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Mass Air Flow Sensor and Coolant Temperature.

Powertrain > Engine > Data List
Tester Display
Engine Speed
Mass Air Flow Sensor
Coolant Temperature
50003 372 211,215,205

v.

Allow the engine to idle until the Coolant Temperature reaches 75°C (167°F) or higher with all the accessories switched off.


vi.

Read Mass Air Flow Sensor while maintaining an engine speed of 3000 rpm.

Standard:
GTS Display Condition Specified Condition
Mass Air Flow Sensor
·

Shift lever position: P

·

A/C: Off

·

Engine warmed up

·

Engine Speed: 3000 rpm


Between 4.0 and 14.0 gm/sec




Result:
Proceed to
OK
NG



OK

5.INSPECT NO. 1 TURBO PRESSURE SENSOR

NG

14.CHECK TERMINAL VOLTAGE (POWER SOURCE OF MASS AIR FLOW METER SUB-ASSEMBLY)
5.INSPECT NO. 1 TURBO PRESSURE SENSOR
a.

Inspect the No. 1 turbo pressure sensor.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>MANIFOLD ABSOLUTE PRESSURE SENSOR>ON-VEHICLE INSPECTION


Result:
Proceed to
OK
NG



OK

6.CLEAR DTC

NG

9.CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 TURBO PRESSURE SENSOR)
6.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Clear the DTCs.

Powertrain > Engine > Clear DTCs
50002 372

e.

Turn the ignition switch off and wait for at least 30 seconds.


Result:
Proceed to
NEXT



NEXT

7.CHECK WHETHER DTC OUTPUT RECURS (DTC P25B372)
7.CHECK WHETHER DTC OUTPUT RECURS (DTC P25B372)
a.

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.


b.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility
Tester Display
All Readiness
50005 372 20

c.

Input the DTC: P25B372.


d.

Check the DTC judgment result.

Result:
Result Proceed to
NORMAL
(DTCs are not output) 		A
ABNORMAL
(DTC P25B372 is output) 		B




A

END

B

8.REPLACE ECM
9.CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 TURBO PRESSURE SENSOR)
A376494C30
0.208,1.01 0.563,1.208 0.354,0.198 0.833,1.833 1.156,1.135 true 1.531,1.833 1.531,1.167 true 2.198,1.833 1.865,1.167 true 0.115,0.094 0.427,0.292 0.313,0.198 10 false *a 0.729,1.854 1.052,2.094 0.323,0.24 10 false PIM 0.25,1.021 0.708,1.219 0.458,0.198 10 false C23 1.438,1.833 1.75,2.031 0.313,0.198 10 false E2 2.146,1.844 2.458,2.042 0.313,0.198 10 false VC
*a Front view of wire harness connector
(to No. 1 Turbo Pressure Sensor)


a.

Disconnect the No. 1 turbo pressure sensor 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
C23-3 (VC) - C23-2 (E2) Ignition switch ON 4.75 to 5.25 V
C23-1 (PIM) - C23-2 (E2) Ignition switch ON 3.0 to 5.25 V



Result:
Proceed to
OK
NG



OK

10.REPLACE NO. 1 TURBO PRESSURE SENSOR

NG

11.CHECK HARNESS AND CONNECTOR (NO. 1 TURBO PRESSURE SENSOR - ECM)
10.REPLACE NO. 1 TURBO PRESSURE SENSOR
a.

Replace the No. 1 turbo pressure sensor.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>MANIFOLD ABSOLUTE PRESSURE SENSOR>REMOVAL


Result:
Proceed to
NEXT



NEXT

27.CLEAR DTC
11.CHECK HARNESS AND CONNECTOR (NO. 1 TURBO PRESSURE SENSOR - ECM)
a.

Disconnect the No. 1 turbo pressure sensor connector.


b.

Disconnect the ECM connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
C23-3 (VC) - C78-140 (VPTA) Always Below 1 Ω
C23-2 (E2) - C78-139 (EPTA) Always Below 1 Ω
C23-1 (PIM) - C78-108 (PTA) Always Below 1 Ω
C23-3 (VC) or C78-140 (VPTA) - Body ground and other terminals Always 10 kΩ or higher
C23-1 (PIM) or C78-108 (PTA) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

12.REPLACE ECM

NG

13.REPAIR OR REPLACE HARNESS OR CONNECTOR
13.REPAIR OR REPLACE HARNESS OR CONNECTOR
a.

Repair or replace the wire harness or connector.


Result:
Proceed to
NEXT



NEXT

27.CLEAR DTC
14.CHECK TERMINAL VOLTAGE (POWER SOURCE OF MASS AIR FLOW METER SUB-ASSEMBLY)
a.
A127724C66
0.333,0.948 0.719,1.167 0.385,0.219 1.01,1.719 1.365,1.146 true 0.156,0.135 0.469,0.333 0.313,0.198 10 false *a 0.396,0.979 0.708,1.177 0.313,0.198 10 false C25 0.938,1.76 1.25,1.958 0.313,0.198 10 false +B
*a Front view of wire harness connector
(to Mass Air Flow Meter Sub-assembly)


Disconnect the mass air flow meter sub-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
C25-1 (+B) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

15.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 1 INTEGRATION RELAY - MASS AIR FLOW METER SUB-ASSEMBLY)

15.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)
a.

Disconnect the mass air flow meter sub-assembly connector.


b.

Disconnect the ECM connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
C25-3 (VG) - C78-92 (VG) Always Below 1 Ω
C25-2 (E2G) - C78-91 (E2G) Always Below 1 Ω
C25-3 (VG) or C78-92 (VG) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

16.REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

NG

17.REPAIR OR REPLACE HARNESS OR CONNECTOR
16.REPLACE MASS AIR FLOW METER SUB-ASSEMBLY
a.

Replace the mass air flow meter sub-assembly.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>MASS AIR FLOW METER>REMOVAL

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION



Result:
Proceed to
NEXT



NEXT

27.CLEAR DTC
17.REPAIR OR REPLACE HARNESS OR CONNECTOR
a.

Repair or replace the wire harness or connector.


Result:
Proceed to
NEXT



NEXT

27.CLEAR DTC
18.PERFORM ACTIVE TEST USING GTS (CONTROL THE WASTEGATE VALVE DUTY RATIO)
a.
A424476C02
1.844,0.719 2.125,0.365 2.125,0.365 2.333,0.365 true 2.375,0.24 2.573,0.438 0.198,0.198 10 true *1
*1 Waste Gate Valve Actuator


Disconnect the vacuum hose of the waste gate valve actuator.


b.

Connect the GTS to the DLC3.


c.

Start the engine.


d.

Turn the GTS on.


e.

Enter the following menus: Powertrain / Engine / Active Test / Control the Wastegate Valve Duty Ratio.

Powertrain > Engine > Active Test
Tester Display
Control the Wastegate Valve Duty Ratio
50004 372 13

f.

When the waste gate valve is operated using the GTS, check whether the vacuum hose of the waste gate valve actuator applies suction your finger.

OK:
GTS Operation Specified Condition
100% Vacuum hose applies suction to finger
0% Vacuum hose applies no suction to finger



Result:
Proceed to
OK
NG



OK

19.REPLACE TURBOCHARGER SUB-ASSEMBLY

NG

20.CHECK VACUUM PUMP ASSEMBLY
19.REPLACE TURBOCHARGER SUB-ASSEMBLY
a.

Replace the turbocharger sub-assembly.

Click hereEngine / Hybrid System>NR Series (INTAKE / EXHAUST)>TURBOCHARGER>REMOVAL


Result:
Proceed to
NEXT



NEXT

27.CLEAR DTC
20.CHECK VACUUM PUMP ASSEMBLY
a.
A424475C02
2.198,0.688 2.5,0.25 2.5,0.25 2.667,0.25 true 2.708,0.146 2.906,0.323 0.198,0.177 10 true *1
*1 Vacuum Regulating Valve Assembly


Disconnect the vacuum hose (vacuum pump assembly side) of the vacuum regulating valve assembly.


b.

Start the engine.


c.

Check whether the vacuum hose of the vacuum regulating valve assembly applies suction your finger.

OK:

Vacuum hose applies suction to finger.



Result:
Proceed to
OK
NG



OK

21.INSPECT VACUUM REGULATING VALVE ASSEMBLY

NG

24.INSPECT VACUUM PUMP ASSEMBLY
21.INSPECT VACUUM REGULATING VALVE ASSEMBLY
a.

Inspect the vacuum regulating valve assembly.

Click hereEngine / Hybrid System>NR Series (EMISSION CONTROL)>VACUUM REGULATING VALVE>INSPECTION


Result:
Proceed to
OK
NG



OK

22.REPAIR OR REPLACE VACUUM HOSE (WASTE GATE VALVE ACTUATOR - VACUUM REGULATING VALVE ASSEMBLY)

NG

23.REPLACE VACUUM REGULATING VALVE ASSEMBLY
22.REPAIR OR REPLACE VACUUM HOSE (WASTE GATE VALVE ACTUATOR - VACUUM REGULATING VALVE ASSEMBLY)
a.

repair or replace the vacuum hose (waste gate valve actuator - vacuum regulating valve assembly)


Result:
Proceed to
NEXT



NEXT

27.CLEAR DTC
23.REPLACE VACUUM REGULATING VALVE ASSEMBLY
a.

Replace the vacuum regulating valve assembly.

Click hereEngine / Hybrid System>NR Series (EMISSION CONTROL)>VACUUM REGULATING VALVE>REMOVAL


Result:
Proceed to
NEXT



NEXT

27.CLEAR DTC
24.INSPECT VACUUM PUMP ASSEMBLY
a.

Inspect the vacuum pump assembly.

for 8NR-FTS: Click hereBrake>BRAKE SYSTEM (OTHER)>VACUUM PUMP (for 8NR-FTS)>ON-VEHICLE INSPECTION

for 9NR-FTS: Click hereBrake>BRAKE SYSTEM (OTHER)>VACUUM PUMP (for 9NR-FTS)>ON-VEHICLE INSPECTION



Result:
Proceed to
OK
NG



OK

25.REPAIR OR REPLACE VACUUM LINE (VACUUM REGULATING VALVE ASSEMBLY - VACUUM PUMP ASSEMBLY)

NG

26.REPLACE VACUUM PUMP ASSEMBLY
25.REPAIR OR REPLACE VACUUM LINE (VACUUM REGULATING VALVE ASSEMBLY - VACUUM PUMP ASSEMBLY)
a.

repair or replace the vacuum line (vacuum regulating valve assembly - vacuum pump assembly).


Result:
Proceed to
NEXT



NEXT

27.CLEAR DTC
27.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Clear the DTCs.

Powertrain > Engine > Clear DTCs
50002 372

e.

Turn the ignition switch off and wait for at least 30 seconds.


Result:
Proceed to
NEXT



NEXT

28.CHECK WHETHER DTC OUTPUT RECURS (DTC P25B372)
28.CHECK WHETHER DTC OUTPUT RECURS (DTC P25B372)
a.

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.


b.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility
Tester Display
All Readiness
50005 372 20

c.

Input the DTC: P25B372.


d.

Check the DTC judgment result.

GTS Display Description
NORMAL
·

DTC judgment completed

·

System normal


ABNORMAL
·

DTC judgment completed

·

System abnormal


INCOMPLETE
·

DTC judgment not completed

·

Perform driving pattern after confirming DTC enabling conditions




Result:
Proceed to
NEXT



NEXT

END