Nissan Pathfinder (2012 year). Manual - part 316

HOW TO ERASE PERMANENT DTC

EC-609

< BASIC INSPECTION >

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Work Procedure (Group B)

INFOID:0000000007799385

NOTE:

Drive the vehicle according to only driving patterns indicating “INCMP” in driving patterns B and D on the

“PERMANENT DTC STATUS” screen.

1.

CHECK DTC

Check DTC.
Is any DTC detected?

YES

>> Repair malfunction(s) and erase DTC. Refer to 

EC-533, "CONSULT Function"

, 

EC-530, "On

Board Diagnosis Function"

.

NO

>> GO TO 2.

2.

CHECK PERMANENT DTC

With CONSULT

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select “PERMANENT DTC STATUS” mode with CONSULT.

With GST

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

*1: When the same malfunction is de-

tected in two consecutive trips, MIL 
will illuminate.

*2: After experiencing driving pattern B 

and D, permanent DTC is erased.

*3: Indication does not change unless 

the ignition switch is turned from ON 
to OFF twice even after experiencing 
driving pattern B or D.

JSBIA0414GB

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EC-610

< BASIC INSPECTION >

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HOW TO ERASE PERMANENT DTC

4. Turn ignition switch ON.

5. Select Service $0A with GST.
Is any permanent DTC detected?

YES

>> GO TO 3.

NO

>> END

3.

DRIVE DRIVING PATTERN B

CAUTION:

• Always drive at a safe speed.

• Never erase self-diagnosis results.

• If self-diagnosis results are erased during the trip of driving pattern B or D, the counter of driving

pattern B and D is reset.

With CONSULT

1. Start engine and warm it up to normal operating temperature.

2. Use “PERMANENT DTC WORK SUPPORT” mode with CONSULT to drive the vehicle according to driv-

ing pattern B. Refer to 

EC-533, "CONSULT Function"

, 

EC-527, "DIAGNOSIS DESCRIPTION : Driving

Pattern"

.

With GST

1. Start engine and warm it up to normal operating temperature.

2. Drive the vehicle according to driving pattern B. Refer to 

EC-527, "DIAGNOSIS DESCRIPTION : Driving

Pattern"

.

>> GO TO 4.

4.

CHECK PERMANENT DTC

With CONSULT

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select “PERMANENT DTC STATUS” mode with CONSULT.

With GST

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select Service $0A with GST.
Is any permanent DTC detected?

YES

>> GO TO 5.

NO

>> END

5.

DRIVE DRIVING PATTERN D

CAUTION:

• Always drive at a safe speed.

• Never erase self-diagnosis results.

• If self-diagnosis results are erased during the trip of driving pattern B or D, the counter of driving

pattern B and D is reset.

Drive the vehicle according to driving pattern D. Refer to 

EC-527, "DIAGNOSIS DESCRIPTION : Driving Pat-

tern"

.

>> GO TO 6.

6.

CHECK PERMANENT DTC

With CONSULT

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

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HOW TO ERASE PERMANENT DTC

EC-611

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5. Select “PERMANENT DTC STATUS” mode with CONSULT.

With GST

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select Service $0A with GST.
Is any permanent DTC detected?

YES

>> GO TO 1.

NO

>> END

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2012 Pathfinder

EC-612

< DTC/CIRCUIT DIAGNOSIS >

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TROUBLE DIAGNOSIS - SPECIFICATION VALUE

DTC/CIRCUIT DIAGNOSIS

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Description

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The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONI-

TOR” mode of CONSULT during normal operation of the Engine Control System. When the value in “SPEC” of

“DATA MONITOR” mode is within the SP value, the Engine Control System is confirmed OK. When the value

in “SPEC” of “DATA MONITOR” mode is NOT within the SP value, the Engine Control System may have one

or more malfunctions.

The SP value is used to detect malfunctions that may affect the Engine Control System, but will not illuminate

the MIL.

The SP value will be displayed for the following three items:

• B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correc-

tion)

• A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)

• MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)

Testing Condition

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• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm

2

, 14.25 - 15.12 psi)

• Atmospheric temperature: 20 - 30

°

C (68 - 86

°

F)

• Engine coolant temperature: 75 - 95

°

C (167 - 203

°

F)

• Engine speed: Idle

• Transmission: Warmed-up

- After the engine is warmed up to normal operating temperature, drive vehicle until “ATF TEMP SE 1” (A/T

fluid temperature sensor signal) indicates more than 60

°

C (140

°

F).

• Electrical load: Not applied

- Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight

ahead.

Inspection Procedure

INFOID:0000000007358468

NOTE:

Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1. Perform 

EC-592, "Basic Inspection"

.

2. Check that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2” and “MAS A/F SE-B1” in “SPEC” of “DATA

MONITOR” mode with CONSULT.

4. Check that monitor items are within the SP value.
5. If NG, go to 

EC-613, "Diagnosis Procedure"

.

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TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-613

< DTC/CIRCUIT DIAGNOSIS >

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Diagnosis Procedure

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OVERALL SEQUENCE

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EC-614

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TROUBLE DIAGNOSIS - SPECIFICATION VALUE

DETAILED PROCEDURE

1.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1. Start engine.

2. Check that the testing conditions are met. Refer to 

EC-612, "Testing Condition"

.

3. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

NOTE:

PBIB3214E

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TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-615

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Check “A/F ALPHA-B1”, “A/F ALPHA-B2” for approximately 1 minute because they may fluctuate. It is NG

if the indication is out of the SP value even a little.

OK or NG

OK

>> GO TO 17.

NG (Less than the SP value)>>GO TO 2.

NG (More than the SP value)>>GO TO 3.

2.

CHECK “B/FUEL SCHDL”

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

value.
OK or NG

OK

>> GO TO 4.

NG (More than the SP value)>>GO TO 19.

3.

CHECK “B/FUEL SCHDL”

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

value.
OK or NG

OK

>> GO TO 6.

NG (More than the SP value)>>GO TO 6.

NG (Less than the SP value)>>GO TO 25.

4.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1. Stop the engine.

2. Disconnect PCV hose, and then plug it.

3. Start engine.

4. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

OK or NG

OK

>> GO TO 5.

NG

>> 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-

ditions.

>>

INSPECTION END

6.

CHECK FUEL PRESSURE

Check fuel pressure. (Refer to 

EC-952, "Fuel Pressure Check"

.)

OK or NG

OK

>> GO TO 9.

NG (Fuel pressure is too high)>>Replace “fuel level sensor unit, fuel filter and fuel pump assembly”, refer to

FL-11

, and then GO TO 8.

NG (Fuel pressure is too low)>>GO TO 7.

7.

DETECT MALFUNCTIONING PART

1. Check the following.

-

Clogged and bent fuel hose and fuel tube

-

Clogged fuel filter

-

Fuel pump and its circuit (Refer to 

EC-928, "Diagnosis Procedure"

.)

2. If NG, repair or replace the malfunctioning part. (Refer to 

EC-952, "Fuel Pressure Check"

.)

If OK, replace “fuel level sensor unit, fuel filter and fuel pump assembly”. Refer to 

FL-11

.

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EC-616

< DTC/CIRCUIT DIAGNOSIS >

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TROUBLE DIAGNOSIS - SPECIFICATION VALUE

>> GO TO 8.

8.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1. Start engine.

2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

OK or NG

OK

>>

INSPECTION END

NG

>> GO TO 9.

9.

PERFORM POWER BALANCE TEST

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

2. Check that each cylinder produces a momentary engine speed drop.
OK or NG

OK

>> GO TO 12.

NG

>> GO TO 10.

10.

DETECT MALFUNCTIONING PART

1. Check the following below.

-

Ignition coil and its circuit (Refer to 

EC-931, "Diagnosis Procedure"

.)

-

Fuel injector and its circuit (Refer to 

EC-925, "Diagnosis Procedure"

.)

-

Intake air leakage

-

Low compression pressure (Refer to 

EM-162, "Compression Pressure"

.)

2. If NG, repair or replace the malfunctioning part.

If OK, replace malfunctioning fuel injector. (It may be caused by leakage from fuel injector or clogging.)

>> GO TO 11.

11.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1. Start engine.

2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

OK or NG

OK

>>

INSPECTION END

NG

>> GO TO 12.

12.

CHECK A/F SENSOR 1 FUNCTION

Perform all DTC Confirmation Procedure related with A/F sensor 1.

• For DTC P0130, P0150, refer to 

EC-676, "DTC Confirmation Procedure"

.

• For DTC P0131, P0151, refer to 

EC-680, "DTC Confirmation Procedure"

.

• For DTC P0132, P0152, refer to 

EC-684, "DTC Confirmation Procedure"

.

• For DTC P0133, P0153, refer to 

EC-688, "DTC Confirmation Procedure"

.

• For DTC P2A00, P2A03, refer to 

EC-911, "DTC Confirmation Procedure"

.

OK or NG

OK

>> GO TO 15.

NG

>> 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”, “A/F ALPHA-B2”

1. Start engine.

2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

OK or NG

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2012 Pathfinder