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

NR Series ENGINE CONTROL  SFI SYSTEM  P04DB00  Crankcase Ventilation System Disconnected  


DESCRIPTION

In the PCV system for a turbocharged engine, the blow-by gas is drawn into the intake pipe due to the intake vacuum via the PCV valve in the natural aspiration range, and blow-by gas forcibly flows through the intake pipe via the ejector to recirculate blow-by in all driving ranges in the turbocharged intake range.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P04DB00 Crankcase Ventilation System Disconnected PCV system air leakage is detected (2 trip detection logic).
·

PCV system

·

Intake system

·

No. 1 turbo pressure sensor

·

No. 2 turbo pressure sensor

·

Mass air flow meter sub-assembly

·

Wire harness or connector

·

ECM


Comes on DTC stored SAE Code: P04DB

MONITOR DESCRIPTION

The ECM monitors for PCV system air leakage and suction.

If the ratio of the intake air volume calculated from the output of the mass air flow meter sub-assembly divided by that calculated from the output of the No. 2 turbo pressure sensor while the vehicle is being driven in the turbocharged intake range to the same when the vehicle is being driven in the natural aspiration range exceeds a threshold, the ECM will illuminate the MIL and store a DTC. (2 trip detection logic)

MONITOR STRATEGY

Required Sensors/Components (Main) PCV system
Required Sensors/Components (Related) Mass air flow meter sub-assembly
Crankshaft position sensor
No. 1 turbo pressure sensor
No. 2 turbo pressure sensor
Frequency of Operation Once per driving cycle

TYPICAL ENABLING CONDITIONS

All
All of the following conditions are met -
Vehicle speed 3 km/h (1.875 mph) or more
Temperature in the surge tank -10°C (14°F) or higher
Shift position 2nd or higher

Boosted Monitor
Both of the following conditions are met -
Engine speed 1000 to 4000 rpm
Air amount per revolution 0.6 to 2.0 g/rev

Non-boosted Monitor
Both of the following conditions are met -
Engine speed 1000 to 2500 rpm
Air amount per revolution 0.2 to 0.5 g/rev

TYPICAL MALFUNCTION THRESHOLDS

All of the following conditions are met -
Calculation number of air amount per revolution at boosted condition (air amount per revolution calculated by air flow meter / air amount per revolution calculated by intake manifold pressure) 300 counts or more
Calculation number of air amount per revolution at non-boosted condition (air amount per revolution calculated by air flow meter / air amount per revolution calculated by intake manifold pressure) 300 counts or more
Ratio of air amount per revolution (air amount per revolution calculated at boosted condition / air amount per revolution calculated at non-boosted condition) More than 1.33

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



A429783E01
1.458,3.302 1.615,2.865 false 1.448,3.302 1.25,2.865 false 1.448,3.302 1.448,2.854 false 2.385,3.302 2.188,2.865 false 2.396,3.469 2.385,2.875 false 2.396,3.302 2.552,2.865 false 1.469,3.302 2.385,3.448 false 2.385,3.448 3.333,3.313 false 3.333,3.302 3.135,2.865 false 3.333,3.323 3.333,2.875 false 3.344,3.302 3.5,2.865 false 4.292,3.302 4.458,2.865 false 4.281,3.323 4.281,2.875 false 4.271,3.302 4.073,2.865 false 5.24,3.302 5.406,2.865 false 5.229,3.438 5.229,2.865 false 5.229,3.313 5.031,2.875 false 6.177,3.302 6.344,2.865 false 6.177,3.313 6.177,2.865 false 6.177,3.313 5.979,2.875 false 5.229,3.448 6.177,3.313 false 4.302,3.302 5.229,3.448 false 0.135,1.323 2.427,1.521 2.292,0.198 10 false 80 km/h 0.313,2.229 2.604,2.427 2.292,0.198 10 false Idling 0.917,2.385 1.521,2.594 0.604,0.208 10 false [A] 1.24,1.417 3.531,1.615 2.292,0.198 10 false [C]* 1.542,1.188 2.25,1.448 0.708,0.26 10 false [D] 2.115,1.635 2.417,1.844 0.302,0.208 10 false [E] 3.104,1.167 5.396,1.365 2.292,0.198 10 false [G]* 6.771,3.156 7.073,3.365 0.302,0.208 10 false [J] 1.833,3.479 3.26,3.688 1.427,0.208 10 false 5 seconds or more 0.135,1.781 2.427,1.979 2.292,0.198 10 false 50 km/h 3.229,0.198 7.042,0.625 3.813,0.427 10 false *: Accelerate with a constant accelerator pedal opening angle. 0.177,0.458 2.469,0.656 2.292,0.198 10 false Vehicle Speed 2.167,1.438 4.458,1.635 2.292,0.198 10 false [C]* 3.052,1.625 3.354,1.833 0.302,0.208 10 false [F] 1.156,1.635 1.698,1.906 0.542,0.271 10 false [B] 4.646,3.469 6.01,3.667 1.365,0.198 10 false 5 seconds or more 2.49,1.188 3.198,1.448 0.708,0.26 10 false [D] 3.427,0.823 5.719,1.021 2.292,0.198 10 false [H] 4.031,1.167 4.781,1.406 0.75,0.24 10 false [G]* 5,1.167 5.75,1.406 0.75,0.24 10 false [G]* 5.938,1.167 6.688,1.406 0.75,0.24 10 false [G]* 4.365,0.823 5.021,1.073 0.656,0.25 10 false [H] 5.313,0.823 5.969,1.073 0.656,0.25 10 false [H] 6.25,0.823 6.906,1.073 0.656,0.25 10 false [H] 4.031,1.625 4.333,1.833 0.302,0.208 10 false [I] 4.979,1.625 5.281,1.833 0.302,0.208 10 false [I] 5.917,1.625 6.219,1.833 0.302,0.208 10 false [I] 0.083,0.938 2.375,1.135 2.292,0.198 10 false 100 km/h

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 with all the accessories switched off [A].

7.

Accelerate the vehicle to 50 km/h (31 mph) or more for 5 seconds or more [B].

CAUTION:

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


8.

Accelerate the vehicle from 50 to 80 km/h (31 to 50 mph) for 5 seconds or more [C].

CAUTION:

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


HINT:

Accelerate with a constant accelerator pedal opening angle.


9.

Drive the vehicle at 80 km/h (50 mph) or more for 5 seconds or more [D].

CAUTION:

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


10.

Allow the vehicle to decelerate until the vehicle speed decreases to 50 km/h (31 mph) for 5 seconds or more [E].

11.

Repeat steps [B] through [E] 2 times or more.

12.

Accelerate the vehicle to 50 km/h (31 mph) or more for 5 seconds or more [F].

CAUTION:

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


13.

Accelerate the vehicle from 50 to 100 km/h (31 to 62 mph) for 5 seconds or more [G].

CAUTION:

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


HINT:

Accelerate with a constant accelerator pedal opening angle.


14.

Drive the vehicle at 100 km/h (62 mph) or more for 5 seconds or more [H].

CAUTION:

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


15.

Allow the vehicle to decelerate until the vehicle speed decreases to 50 km/h (31 mph) for 5 seconds or more [I].

16.

Repeat steps [F] through [I] 4 times or more.

17.

Turn the GTS on.

18.

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

19.

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.



20.

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

21.

Input the DTC: P04DB00.

22.

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 shows NORMAL, the system is normal.

·

If the judgment result shows ABNORMAL, the system has a malfunction.

·

If the judgment result shows INCOMPLETE, perform steps [B] through [J] again.

·

[A] to [J]: 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

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 P04DB00)
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 P04DB00 is output A
DTC P04DB00 and other DTCs are output B


HINT:

If any DTCs other than P04DB00 are output, troubleshoot those DTCs first.




A

2.CHECK PCV SYSTEM

B

GO TO DTC CHART

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


2.CHECK PCV SYSTEM
A446117

a.

Check the PCV hose connections.

OK:

PCV hose are connected correctly and are not damaged.



Result:
Proceed to
OK
NG



OK

3.CHECK INTAKE SYSTEM

NG

17.REPAIR OR REPLACE PCV SYSTEM
3.CHECK INTAKE SYSTEM
a.

Check the intake system for vacuum leaks.

Click hereEngine / Hybrid System>NR Series (INTAKE / EXHAUST)>INTAKE SYSTEM>ON-VEHICLE INSPECTION

OK:

No leaks in intake system.



Result:
Proceed to
OK
NG



OK

4.INSPECT NO. 1 TURBO PRESSURE SENSOR

NG

16.REPAIR OR REPLACE INTAKE SYSTEM
4.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

5.INSPECT NO. 2 TURBO PRESSURE SENSOR

NG

REPLACE NO. 1 TURBO PRESSURE SENSOR

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


5.INSPECT NO. 2 TURBO PRESSURE SENSOR
a.

Inspect the No. 2 turbo pressure sensor.

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


Result:
Proceed to
OK
NG



OK

6.READ VALUE USING GTS (MASS AIR FLOW SENSOR)

NG

REPLACE NO. 2 TURBO PRESSURE SENSOR

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


6.READ VALUE USING GTS (MASS AIR FLOW SENSOR)
a.

Connect the GTS to the DLC3.


b.

Start the engine and warm it up.


c.

Turn the GTS on.


d.

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

e.

Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.


f.

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

7.CLEAR DTC

NG

9.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION)
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 P04DB00)
8.CHECK WHETHER DTC OUTPUT RECURS (DTC P04DB00)
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: P04DB00.


d.

Check the DTC judgment result.

Result:
Result Proceed to
NORMAL
(DTCs are not output) 		A
ABNORMAL
(DTC P04DB00 is output) 		B




A

CHECK FOR INTERMITTENT PROBLEMS

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>CHECK FOR INTERMITTENT PROBLEMS


B

REPLACE ECM

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>ECM>REMOVAL


9.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION)
a.

Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM.

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>ELECTRONIC CIRCUIT INSPECTION PROCEDURE

HINT:

Repair any problems.



Result:
Proceed to
NEXT



NEXT

10.CLEAR DTC
10.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

11.CHECK WHETHER DTC OUTPUT RECURS (DTC P04DB00)
11.CHECK WHETHER DTC OUTPUT RECURS (DTC P04DB00)
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: P04DB00.


d.

Check the DTC judgment result.

Result:
Result Proceed to
NORMAL
(DTCs are not output) 		A
ABNORMAL
(DTC P04DB00 is output) 		B




A

END

B

12.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)
12.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

13.REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

13.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:
·

If the result of the inspection performed in step 6 (READ VALUE USING GTS (MASS AIR FLOW SENSOR)) indicated no problem, proceed to the next step without replacing the mass air flow meter sub-assembly.

·

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

14.CLEAR DTC
14.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

15.CHECK WHETHER DTC OUTPUT RECURS (DTC P04DB00)
15.CHECK WHETHER DTC OUTPUT RECURS (DTC P04DB00)
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: P04DB00.


d.

Check the DTC judgment result.

Result:
Result Proceed to
NORMAL
(DTCs are not output) 		A
ABNORMAL
(DTC P04DB00 is output) 		B




A

END

B

REPLACE ECM

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>ECM>REMOVAL


16.REPAIR OR REPLACE INTAKE SYSTEM
a.

Repair or replace the intake system.

HINT:

Perform "Inspection After Repair" after repairing or replacing the intake system.

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



Result:
Proceed to
NEXT



NEXT

18.CLEAR DTC
17.REPAIR OR REPLACE PCV SYSTEM
a.

Repair or replace the PCV system.


Result:
Proceed to
NEXT



NEXT

18.CLEAR DTC
18.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

19.CHECK WHETHER DTC OUTPUT RECURS (DTC P04DB00)
19.CHECK WHETHER DTC OUTPUT RECURS (DTC P04DB00)
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: P04DB00.


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