Nissan X-Trail 32. Manual - part 757

 

  Главная      Nissan     Nissan X-Trail 32 - Service Manual

 

поиск по сайту            

 

 

 

 

 

 

 

 

 

содержание   ..  755  756  757  758   ..

 

 

Nissan X-Trail 32. Manual - part 757

 

 

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-157

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NOTE:
Check “A/F ALPHA-B1” for approximately 1 minute because they may fluctuate. It is NG if the indication is
out of the SP value even a little.

Is the measurement value within the SP value?

YES

>> GO TO 17.

NO-1

>> Less than the SP value: GO TO 2.

NO-2

>> More than the SP value: GO TO 3.

2.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.

Is the measurement value within the SP value?

YES

>> GO TO 4.

NO

>> More than the SP value: GO TO 19.

3.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.

Is the measurement value within the SP value?

YES

>> GO TO 6.

NO-1

>> More than the SP value: GO TO 6.

NO-2

>> Less than the SP value: GO TO 25.

4.

CHECK “A/F ALPHA-B1”

1.

Stop the engine.

2.

Disconnect PCV hose, and then plug it.

3.

Start engine.

4.

Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.

Is the measurement value within the SP value?

YES

>> GO TO 5.

NO

>> GO TO 6.

5.

CHANGE ENGINE OIL

1.

Stop the engine.

2.

Change engine oil.
NOTE:
This symptom may occur when a large amount of gasoline is mixed with engine oil because of driving
conditions (such as when engine oil temperature does not rise enough since a journey distance is too
short during winter). The symptom will not be detected after changing engine oil or changing driving con-
dition.

>> INSPECTION END

6.

CHECK FUEL PRESSURE

Check fuel pressure. (Refer to 

EC-152, "Work Procedure"

.)

Is the inspection result normal?

YES

>> GO TO 9.

NO-1

>> Fuel pressure is too high: Replace “fuel filter and fuel pump assembly”, refer to 

FL-12, "Removal

and Installation"

, and then GO TO 8.

NO-2

>> Fuel pressure is too low: GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check fuel hoses and fuel tubes for clogging

Is the inspection result normal?

YES

>> Replace “fuel filter and fuel pump assembly”, refer to 

FL-12, "Removal and Installation"

, and then

GO TO 8.

NO

>> Repair or replace and then GO TO 8.

EC-158

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

8.

CHECK “A/F ALPHA-B1”

1.

Start engine.

2.

Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> GO TO 9.

9.

PERFORM POWER BALANCE TEST

1.

Perform “POWER BALANCE” in “ACTIVE TEST” mode.

2.

Make sure that the each cylinder produces a momentary engine speed drop.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 10.

10.

DETECT MALFUNCTIONING PART

Check the following.
1.

Ignition coil and its circuit (Refer to 

EC-399, "Component Function Check"

.)

2.

Fuel injector and its circuit (Refer to 

EC-399, "Component Function Check"

.)

3.

Intake air leakage

4.

Low compression pressure (Refer to 

EM-19, "Inspection"

.)

Is the inspection result normal?

YES

>> Replace fuel injector, refer to 

EM-48, "Removal and Installation"

, and then GO TO 11.

NO

>> Repair or replace malfunctioning part and then GO TO 11.

11.

CHECK “A/F ALPHA-B1”

1.

Start engine.

2.

Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> GO TO 12.

12.

CHECK A/F SENSOR 1 FUNCTION

Perform all DTC CONFIRMATION PROCEDURE related with A/F sensor 1.
• For DTC P0130, refer to 

EC-214, "DTC Description"

.

• For DTC P0131, refer to 

EC-217, "DTC Description"

.

• For DTC P0132, refer to 

EC-220, "DTC Description"

.

• For DTC P014C, P014D, refer to 

EC-243, "DTC Description"

.

Is any DTC detected?

YES

>> GO TO 15.

NO

>> GO TO 13.

13.

CHECK A/F SENSOR 1 CIRCUIT

Perform DIAGNOSTIC PROCEDURE according to corresponding DTC.

>> GO TO 14.

14.

CHECK “A/F ALPHA-B1”

1.

Start engine.

2.

Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the each indication is
within the SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> GO TO 15.

15.

DISCONNECT AND RECONNECT ECM HARNESS CONNECTOR

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-159

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1.

Stop the engine.

2.

Disconnect ECM harness connector. Check pin terminal and connector for damage, and then reconnect it.

>> GO TO 16.

16.

CHECK “A/F ALPHA-B1”

1.

Start engine.

2.

Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> Detect malfunctioning part according to 

EC-420, "Symptom Table"

.

17.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
Is the measurement value within the SP value?

YES

>> INSPECTION END

NO-1

>> More than the SP value: GO TO 18.

NO-2

>> Less than the SP value: GO TO 25.

18.

DETECT MALFUNCTIONING PART

1.

Check for the cause of large engine friction. Refer to the following.

-

Engine oil level is too high

-

Engine oil viscosity

-

Belt tension of power steering, alternator, A/C compressor, etc. is excessive

-

Noise from engine

-

Noise from transmission, etc.

2.

Check for the cause of insufficient combustion. Refer to the following.

-

Valve clearance malfunction

-

Intake valve timing control function malfunction

-

Camshaft sprocket installation malfunction, etc.

>> Repair or replace malfunctioning part, and then GO TO 30.

19.

CHECK INTAKE SYSTEM

Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
• Crushed air ducts
• Malfunctioning seal of air cleaner element
• Uneven dirt of air cleaner element
• Improper specification of intake air system

Is the inspection result normal?

YES

>> GO TO 21.

NO

>> Repair or replace malfunctioning part, and then GO TO 20.

20.

CHECK “A/F ALPHA-B1”, AND “B/FUEL SCHDL”

Select “A/F ALPHA-B1” and “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the
each indication is within the SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> “B/FUEL SCHDL” is more, “A/F ALPHA-B1” is less than the SP value: GO TO 21.

21.

DISCONNECT AND RECONNECT MASS AIR FLOW SENSOR HARNESS CONNECTOR

1.

Stop the engine.

2.

Disconnect mass air flow sensor harness connector. Check pin terminal and connector for damage and
then reconnect it again.

>> GO TO 22.

EC-160

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

22.

CHECK “A/F ALPHA-B1”

1.

Start engine.

2.

Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.

Is the measurement value within the SP value?

YES

>> Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to 

EC-196, "DTC

Description"

. Then GO TO 29.

NO

>> GO TO 23.

23.

CHECK “MASS AIR FLOW SENSOR (HZ)”

Select “MASS AIR FLOW SENSOR (Hz)” in “SPEC” of “DATA MONITOR” mode, and make sure that the indi-
cation is within the SP value.
Is the measurement value within the SP value?

YES

>> GO TO 24.

NO

>> More than the SP value: Replace mass air flow sensor, refer to 

EM-31, "Removal and Installa-

tion"

, and then GO TO 29.

24.

REPLACE ECM

Replace ECM. Refer to 

EC-430, "Removal and Installation"

.

>> GO TO 29.

25.

CHECK INTAKE SYSTEM

Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
• Crushed air ducts
• Malfunctioning seal of air cleaner element
• Uneven dirt of air cleaner element
• Improper specification of intake air system

Is the inspection result normal?

YES

>> GO TO 27.

NO

>> Repair or replace malfunctioning part, and then GO TO 26.

26.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> Less than the SP value: GO TO 27.

27.

CHECK “MASS AIR FLOW SENSOR (HZ)”

Select “MASS AIR FLOW SENSOR (Hz)” in “SPEC” of “DATA MONITOR” mode, and make sure that the indi-
cation is within the SP value.

Is the measurement value within the SP value?

YES

>> GO TO 28.

NO

>> Less than the SP value: Replace mass air flow sensor, refer to 

EM-31, "Removal and Installation"

,

and then GO TO 30.

28.

CHECK INTAKE SYSTEM

Check for the cause of air leak after the mass air flow sensor. Refer to the following.
• Disconnection, looseness, and cracks in air duct
• Looseness of oil filler cap
• Disconnection of oil level gauge
• Open stuck, breakage, hose disconnection, or cracks of PCV valve
• Disconnection or cracks of EVAP purge hose, open stuck of EVAP canister purge volume control solenoid

valve

• Malfunctioning seal of rocker cover gasket
• Disconnection, looseness, or cracks of hoses, such as vacuum hose, connecting to intake air system parts

 

 

 

 

 

 

 

содержание   ..  755  756  757  758   ..