Nissan Pathfinder (2009 year). Manual - part 309

EC-486

< ON-VEHICLE MAINTENANCE >

[VQ40DE]

EVAP LEAK CHECK

EVAP LEAK CHECK

How to Detect Fuel Vapor Leakage

INFOID:0000000004297673

CAUTION:

• Never use compressed air or a high pressure pump.
• Never exceed 4.12 kPa (0.042 kg/cm

2

, 0.6 psi) of pressure in EVAP system.

NOTE:
• Do not start engine.
• Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.

 WITH CONSULT-III

1.

Attach the EVAP service port adapter securely to the EVAP service port.

2.

Also attach the pressure pump and hose to the EVAP service port adapter.

3.

Turn ignition switch ON.

4.

Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT MODE” with CONSULT-III.

5.

Touch “START”. A bar graph (Pressure indicating display) will appear on the screen.

6.

Apply positive pressure to the EVAP system until the pressure indicator reaches the middle of the bar
graph.

7.

Remove EVAP service port adapter and hose with pressure pump.

8.

Locate the leak using a leak detector. Refer to 

EC-45, "Descrip-

tion"

.

 WITHOUT CONSULT-III

1.

Attach the EVAP service port adapter securely to the EVAP ser-
vice port.

2.

Also attach the pressure pump with pressure gauge to the EVAP
service port adapter.

3.

Apply battery voltage between the terminals of EVAP canister
vent control valve (3) to make a closed EVAP system.

-

Fuel filler pipe (top of frame view) (1)

-

EVAP control system pressure sensor (2)

-

EVAP ccanister (4)

-

Drain filter (5)

-

: Vehicle front

4.

To locate the leak, deliver positive pressure to the EVAP system
until pressure gauge points reach 1.38 to 2.76 kPa (0.014 to
0.028 kg/cm

2

, 0.2 to 0.4 psi).

5.

Remove EVAP service port adapter and hose with pressure
pump.

6.

Locate the leak using a leak detector. Refer to 

EC-45, "Description"

.

SEF200U

SEF462UA

AWBIA0134ZZ

2009 Pathfinder

EVAP CANISTER

EC-487

< ON-VEHICLE REPAIR >

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ON-VEHICLE REPAIR

EVAP CANISTER

Component Inspection

INFOID:0000000004297674

EVAP CANISTER

Check EVAP canister as follows:

1.

Block port B.

2.

Blow air into port A and check that it flows freely out of port C.

3.

Release blocked port B.

4.

Apply vacuum pressure to port B and check that vacuum pres-
sure exists at the ports A and C.

5.

Block port A and B.

6.

Apply pressure to port C and check that there is no leakage.

Removal and Installation

INFOID:0000000004297675

EVAP CANISTER

Tighten EVAP canister as shown in the figure.

EVAP CANISTER VENT CONTROL VALVE

1.

Turn EVAP canister vent control valve counterclockwise.

2.

Remove the EVAP canister vent control valve.

Always replace O-ring with a new one.

PBIB2568E

BBIA0566E

BBIA0567E

2009 Pathfinder

EC-488

< SERVICE DATA AND SPECIFICATIONS (SDS) 

[VQ40DE]

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Fuel Pressure

INFOID:0000000004297676

Idle Speed and Ignition Timing

INFOID:0000000004297677

*: Under the following conditions:

• Air conditioner switch: OFF

• Electric load: OFF (Lights, heater fan & rear window defogger)

• Steering wheel: Kept in straight-ahead position

Calculated Load Value

INFOID:0000000004297678

Mass Air Flow Sensor

INFOID:0000000004297679

*: Engine is warmed up to normal operating temperature and running under no load.

Intake Air Temperature Sensor

INFOID:0000000004297680

Engine Coolant Temperature Sensor

INFOID:0000000004297681

Air Fuel Ratio (A/F) Sensor 1 Heater

INFOID:0000000004297682

Fuel pressure at idling kPa (kg/cm

2

, psi)

Approximately 350 (3.57, 51)

Target idle speed

No load* (in P or N position)

625 

±

 50 rpm

Air conditioner: ON

In P or N position

625 rpm or more

Ignition timing

In P or N position

15 

±

 5

°

 BTDC

Condition

Calculated load value% (Using CONSULT-III or GST)

At idle

5 - 35

At 2,500 rpm

5 - 35

Supply voltage

Battery voltage (11 - 14V)

Output voltage at idle

0.9 - 1.2*V

Mass air flow (Using CONSULT-III or GST)

2.0 - 6.0 g·m/sec at idle*

7.0 - 20.0 g·m/sec at 2,500 rpm*

Temperature 

°

C (

°

F)

Resistance k

Ω

25 (77)

1.800 - 2.200

Temperature 

°

C (

°

F)

Resistance k

Ω

20 (68)

2.1 - 2.9

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

Resistance [at 25

°

C (77

°

F)]

1.80 - 2.44

Ω

2009 Pathfinder

SERVICE DATA AND SPECIFICATIONS (SDS)

EC-489

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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Heated Oxygen sensor 2 Heater

INFOID:0000000004297683

Crankshaft Position Sensor (POS)

INFOID:0000000004297684

Refer to 

EC-215, "Component Inspection"

.

Camshaft Position Sensor (PHASE)

INFOID:0000000004297685

Refer to 

EC-220, "Component Inspection"

.

Throttle Control Motor

INFOID:0000000004297686

Fuel Injector

INFOID:0000000004297687

Fuel Pump

INFOID:0000000004297688

Resistance [at 25

°

C (77

°

F)]

9.9 - 13.3

Ω

Resistance [at 25

°

C (77

°

F)]

Approximately 1 - 15

Ω

Resistance [at 10 - 60

°

C (50 - 140

°

F)]

11.1 - 14.5

Ω

Resistance [at 25

°

C (77

°

F)]

0.2 - 5.0

Ω

2009 Pathfinder

EC-490

< BASIC INSPECTION >

[VK56DE]

DIAGNOSIS AND REPAIR WORK FLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORK FLOW

Trouble Diagnosis Introduction

INFOID:0000000003936452

INTRODUCTION

The engine has an ECM to control major systems such as fuel con-
trol, ignition control, idle air control system, etc. The ECM accepts
input signals from sensors and instantly drives actuators. It is essen-
tial that both input and output signals are proper and stable. At the
same time, it is important that there are no malfunctions such as vac-
uum leakage, fouled spark plugs, or other malfunctions with the
engine.

It is much more difficult to diagnose an incident that occurs intermit-
tently rather than continuously. Most intermittent incidents are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.

A visual check only may not find the cause of the incidents. A road
test with CONSULT-III (or GST) or a circuit tester connected should
be performed. Follow the Work Flow on "WORK FLOW".
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on "Worksheet Sample" should be used.
Start your diagnosis by looking for conventional malfunctions first.
This will help troubleshoot driveability malfunctions on an electroni-
cally controlled engine vehicle.

WORK FLOW

MEF036D

SEF233G

SEF234G

2009 Pathfinder

DIAGNOSIS AND REPAIR WORK FLOW

EC-491

< BASIC INSPECTION >

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Overall Sequence

Detailed Flow

1.

GET INFORMATION FOR SYMPTOM

Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred) using the DIAGNOSTIC WORKSHEET.

>> GO TO 2.

JMBIA1416GB

2009 Pathfinder

EC-492

< BASIC INSPECTION >

[VK56DE]

DIAGNOSIS AND REPAIR WORK FLOW

2.

CHECK DTC

1.

Check DTC.

2.

Perform the following procedure if DTC is displayed.

-

Record DTC and freeze frame data. (Print them out with CONSULT-III or GST.)

-

Erase DTC. (Refer to 

EC-525, "Emission-related Diagnostic Information"

.)

-

Study the relationship between the cause detected by DTC and the symptom described by the customer.
(Symptom Matrix Chart is useful. Refer to 

EC-940, "Symptom Matrix Chart"

.)

3.

Check related service bulletins for information.

Are any symptoms described and any DTCs detected?

Symptom is described, DTC is displayed>>GO TO 3.
Symptom is described, DTC is not displayed>>GO TO 4.
Symptom is not described, DTC is displayed>>GO TO 5.

3.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer (except MIL ON).
DIAGNOSIS WORKSHEET is useful to verify the incident.
Also study the normal operation and fail-safe related to the symptom. Refer to 

EC-944, "Fuel Cut Control (at

No Load and High Engine Speed)"

 and 

EC-919, "Fail-Safe Chart"

.

Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 5.

4.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer.
DIAGNOSIS WORK SHEET is useful to verify the incident.
Also study the normal operation and fail-safe related to the symptom. Refer to 

EC-944, "Fuel Cut Control (at

No Load and High Engine Speed)"

 and 

EC-919, "Fail-Safe Chart"

.

Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 6.

5.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC Confirmation Procedure for the displayed DTC, and then check that DTC is detected again.
If two or more DTCs are detected, refer to 

EC-921, "DTC Inspection Priority Chart"

 and determine trouble

diagnosis order.
NOTE:
• Freeze frame data is useful if the DTC is not detected.
• Perform Overall Function Check if DTC Confirmation Procedure is not included on Service Manual. This

simplified check procedure is an effective alternative though DTC cannot be detected during this check.
If the result of Overall Function Check is NG, it is the same as the detection of DTC by DTC Confirmation
Procedure.

Is DTC detected?

Yes

>> GO TO 10.

No

>> Check according to WORK FLOW.

6.

PERFORM BASIC INSPECTION

Perform 

EC-495, "Basic Inspection"

.

With CONSULT-III>>GO TO 7.
Without CONSULT-III>>GO TO 9.

7.

PERFORM SPEC IN DATA MONITOR MODE

 With CONSULT-III

Check that “MAS A/F SE-B1”, “B/FUEL SCHDL”, and “A/F ALPHA-B1”, “A/F ALPHA-B2” are within the SP
value using CONSULT-III “SPEC” in “DATA MONITOR” mode. Refer to 

EC-557, "Inspection Procedure"

.

Are they within the SP value?

Yes

>> GO TO 9.

2009 Pathfinder

DIAGNOSIS AND REPAIR WORK FLOW

EC-493

< BASIC INSPECTION >

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No

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Detect malfunctioning part according to 

EC-558, "Diagnosis Procedure"

.

Is a malfunctioning part detected?

Yes

>> GO TO 11.

No

>> GO TO 9.

9.

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM MATRIX CHART

Detect malfunctioning system according to 

EC-940, "Symptom Matrix Chart"

 based on the confirmed symptom

in step 4, and determine the trouble diagnosis order based on possible causes and symptoms.

>> GO TO 10.

10.

DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure in EC section described based on open circuit inspection. A short circuit inspection
is also required for the circuit check in the Diagnostic Procedure. For details, refer to Circuit Inspection in 

GI-

52, "Circuit Inspection"

.

Is a malfunctioning part detected?

Yes

>> GO TO 11.

No

>> Monitor input data from related sensors using CONSULT-III or check voltage of related ECM ter-

minals. Refer to 

EC-887, "CONSULT-III Reference Value in Data Monitor Mode"

, 

EC-890, "ECM

Terminal and Reference Value"

.

11.

REPAIR OR REPLACE THE MALFUNCTIONING PART

1.

Repair or replace the malfunctioning part.

2.

Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-
ment.

3.

Check DTC. If DTC is displayed, erase it, refer to 

EC-525, "Emission-related Diagnostic Information"

.

>> GO TO 12.

12.

FINAL CHECK

When DTC was detected in step 2, perform DTC Confirmation Procedure or Overall Function Check again,
and then check that the malfunction have been completely repaired.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and check that
the symptom is not detected.

OK or NG

NG (DTC is detected)>>GO TO 10.
NG (Symptom remains)>>GO TO 6.
OK

>> 1.

Before returning the vehicle to the customer, always erase unnecessary DTC in ECM and
TCM. (Refer to 

EC-525, "Emission-related Diagnostic Information"

 and 

TM-34, "OBD-II Diag-

nostic Trouble Code (DTC)"

.)

2.

If the completion of SRT is needed, drive vehicle under the specific driving pattern. Refer to
Driving Pattern in 

EC-525, "Emission-related Diagnostic Information"

.

3.

INSPECTION END

DIAGNOSTIC WORKSHEET

Description

2009 Pathfinder