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

NR Series ENGINE CONTROL  SFI SYSTEM  P25B473  Turbocharger/Supercharger Wastegate "A" Actuator Stuck Closed  


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
P25B473 Turbocharger/Supercharger Wastegate "A" Actuator Stuck Closed The boost pressure does not drop despite control to open the waste gate valve (2 trip detection logic).
·

Turbocharger sub-assembly

·

Vacuum regulating valve assembly

·

No. 1 turbo pressure sensor

·

Mass air flow meter sub-assembly

·

Wire harness or connector

·

ECM


Comes on DTC stored SAE Code: P25B4

MONITOR DESCRIPTION

Monitors the turbocharging pressure when the waste gate valve receives an open command. A waste gate valve stuck close malfunction occurs when the turbocharging variation, which results from 2 operation conditions with differing air volumes, becomes equal to, or greater than, the judgment variation. 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



A335756E02
0.625,0.833 1.719,1.135 1.094,0.302 10 false 80 km/h 0.271,1.323 1.365,1.625 1.094,0.302 10 false 30 to 50 km/h 0.792,2.375 1.302,2.667 0.51,0.292 10 false Idling 1.865,2.25 2.375,2.542 0.51,0.292 10 false [A] 3.688,1.167 4.198,1.458 0.51,0.292 10 false [B] 5.344,0.573 5.854,0.865 0.51,0.292 10 false [C] 6.635,3.292 6.917,3.615 0.281,0.323 10 false [D] 3.167,2.969 4.406,3.26 1.24,0.292 10 false 10 seconds or more 4.823,2.979 6.188,3.26 1.365,0.281 10 false 10 seconds or more 1.604,2.927 2.552,3.292 0.948,0.365 10 false Warming up 0.219,0.469 1.75,0.74 1.531,0.271 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 30 to 50 km/h (19 to 31 mph) for 10 seconds or more [B].

CAUTION:

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


9.

Drive the vehicle at 80 km/h (50 mph) or more for 10 seconds or more [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: P25B473.

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. 2 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 P25B473)
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 P25B473 is output A
DTC P25B473 and other DTCs are output B


HINT:

If any DTCs other than P25B473 are output, troubleshoot those DTCs first.




A

2.CHECK VACUUM REGULATING VALVE ASSEMBLY

B

GO TO DTC CHART

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


2.CHECK VACUUM REGULATING VALVE ASSEMBLY
a.
A424484C02
1.865,0.688 2.167,0.344 2.167,0.344 2.354,0.344 true 2.385,0.25 2.583,0.448 0.198,0.198 10 true *1
*1 Waste Gate Valve Actuator


Disconnect the vacuum hose of the waste gate valve actuator.


b.

Start the engine.


c.

Check whether the vacuum hose of the vacuum regulating valve assembly applies no suction your finger.

OK:

Vacuum hose applies no suction to finger.



Result:
Proceed to
OK
NG



OK

3.INSPECT WASTE GATE VALVE

NG

20.REPLACE VACUUM REGULATING VALVE ASSEMBLY
3.INSPECT WASTE GATE VALVE
a.

Inspect the waste gate valve.

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


Result:
Proceed to
OK
NG



OK

4.INSPECT WASTE GATE VALVE ACTUATOR

NG

19.REPLACE TURBOCHARGER SUB-ASSEMBLY
4.INSPECT WASTE GATE VALVE ACTUATOR
a.

Inspect the waste gate valve actuator.

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


Result:
Proceed to
OK
NG



OK

5.INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

NG

19.REPLACE TURBOCHARGER SUB-ASSEMBLY
5.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

6.INSPECT NO. 1 TURBO PRESSURE SENSOR

NG

15.CHECK TERMINAL VOLTAGE (POWER SOURCE OF MASS AIR FLOW METER SUB-ASSEMBLY)
6.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

7.CLEAR DTC

NG

10.CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 TURBO PRESSURE SENSOR)
7.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

8.CHECK WHETHER DTC OUTPUT RECURS (DTC P25B473)
8.CHECK WHETHER DTC OUTPUT RECURS (DTC P25B473)
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: P25B473.


d.

Check the DTC judgment result.

Result:
Result Proceed to
NORMAL
(DTCs are not output) 		A
ABNORMAL
(DTC P25B473 is output) 		B




A

END

B

9.REPLACE ECM
10.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

11.REPLACE NO. 1 TURBO PRESSURE SENSOR

NG

12.CHECK HARNESS AND CONNECTOR (NO. 1 TURBO PRESSURE SENSOR - ECM)
11.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

21.CLEAR DTC
12.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

13.REPLACE ECM

NG

14.REPAIR OR REPLACE HARNESS OR CONNECTOR
14.REPAIR OR REPLACE HARNESS OR CONNECTOR
a.

Repair or replace the wire harness or connector.


Result:
Proceed to
NEXT



NEXT

21.CLEAR DTC
15.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

16.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)

16.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

17.REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

NG

18.REPAIR OR REPLACE HARNESS OR CONNECTOR
17.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

21.CLEAR DTC
18.REPAIR OR REPLACE HARNESS OR CONNECTOR
a.

Repair or replace the wire harness or connector.


Result:
Proceed to
NEXT



NEXT

21.CLEAR DTC
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

21.CLEAR DTC
20.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

21.CLEAR DTC
21.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

22.CHECK WHETHER DTC OUTPUT RECURS (DTC P25B473)
22.CHECK WHETHER DTC OUTPUT RECURS (DTC P25B473)
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: P25B473.


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