Nissan Pathfinder (2010 year). Manual - part 240

 

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Nissan Pathfinder (2010 year). Manual - part 240

 

 

EC-12

Diagnosis Procedure  .............................................

838

Component Inspection ...........................................

841

P2118 THROTTLE CONTROL MOTOR ..........

842

Component Description  .........................................

842

On Board Diagnosis Logic .....................................

842

DTC Confirmation Procedure  ................................

842

Diagnosis Procedure  .............................................

842

Component Inspection ...........................................

843

P2119 ELECTRIC THROTTLE CONTROL 
ACTUATOR .....................................................

844

Component Description  .........................................

844

On Board Diagnosis Logic .....................................

844

DTC Confirmation Procedure  ................................

844

Diagnosis Procedure  .............................................

845

P2122, P2123 APP SENSOR  ..........................

846

Component Description  .........................................

846

On Board Diagnosis Logic .....................................

846

DTC Confirmation Procedure  ................................

846

Diagnosis Procedure  .............................................

846

Component Inspection ...........................................

848

P2127, P2128 APP SENSOR  ..........................

849

Component Description  .........................................

849

On Board Diagnosis Logic .....................................

849

DTC Confirmation Procedure  ................................

849

Diagnosis Procedure  .............................................

849

Component Inspection ...........................................

852

P2135 TP SENSOR  .........................................

853

Component Description  .........................................

853

On Board Diagnosis Logic .....................................

853

DTC Confirmation Procedure  ................................

853

Diagnosis Procedure  .............................................

853

Component Inspection ...........................................

856

P2138 APP SENSOR  ......................................

857

Component Description  .........................................

857

On Board Diagnosis Logic .....................................

857

DTC Confirmation Procedure  ................................

857

Diagnosis Procedure  .............................................

857

Component Inspection ...........................................

860

P2A00, P2A03 A/F SENSOR 1  .......................

861

Component Description  .........................................

861

On Board Diagnosis Logic .....................................

861

DTC Confirmation Procedure  ................................

861

Diagnosis Procedure  .............................................

862

ASCD BRAKE SWITCH ..................................

867

Component Description  .........................................

867

Diagnosis Procedure  .............................................

867

Component Inspection ...........................................

868

ASCD INDICATOR  ..........................................

870

Component Description  .........................................

870

Diagnosis Procedure  .............................................

870

COOLING FAN  ................................................

871

Description ............................................................

871

Diagnosis Procedure .............................................

871

Component Inspection  ..........................................

872

ELECTRICAL LOAD SIGNAL ..........................

873

Description ............................................................

873

Diagnosis Procedure .............................................

873

FUEL INJECTOR ..............................................

875

Component Description  ........................................

875

Diagnosis Procedure .............................................

875

Component Inspection  ..........................................

876

FUEL PUMP  .....................................................

878

Description ............................................................

878

Diagnosis Procedure .............................................

878

Component Inspection  ..........................................

880

IGNITION SIGNAL ............................................

881

Component Description  ........................................

881

Diagnosis Procedure .............................................

881

Component Inspection  ..........................................

884

ON BOARD REFUELING VAPOR RECOV-
ERY (ORVR)  .....................................................

886

System Description  ...............................................

886

Diagnosis Procedure .............................................

886

Component Inspection  ..........................................

889

POSITIVE CRANKCASE VENTILATION .........

891

Description ............................................................

891

Component Inspection  ..........................................

891

REFRIGERANT PRESSURE SENSOR  ...........

893

Component Description  ........................................

893

Diagnosis Procedure .............................................

893

ECU DIAGNOSIS  ......................................

896

ECM ..................................................................

896

CONSULT-III Reference Value in Data Monitor 
Mode .....................................................................

896

ECM Harness Connector Terminal Layout  ...........

899

ECM Terminal and Reference Value  ....................

899

Wiring Diagram - ENGINE CONTROL SYSTEM - .

908

Fail-Safe Chart ......................................................

926

DTC Inspection Priority Chart ...............................

928

DTC Index .............................................................

928

Emission-related Diagnostic Information  ..............

932

SYMPTOM DIAGNOSIS  ...........................

947

ENGINE CONTROL SYSTEM SYMPTOMS  ....

947

Symptom Matrix Chart  ..........................................

947

NORMAL OPERATING CONDITION ...............

951

Fuel Cut Control (at No Load and High Engine 
Speed) ..................................................................

951

PRECAUTION ...........................................

952

PRECAUTIONS  ................................................

952

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Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...............................................................

952

On Board Diagnosis (OBD) System of Engine and 
A/T .........................................................................

952

Precaution .............................................................

952

PREPARATION .........................................

956

PREPARATION ................................................

956

Special Service Tool  .............................................

956

Commercial Service Tool  ......................................

956

ON-VEHICLE MAINTENANCE ..................

958

FUEL PRESSURE ............................................

958

Fuel Pressure Check .............................................

958

EVAP LEAK CHECK ........................................

960

How to Detect EVAP Leakage ..............................

960

ON-VEHICLE REPAIR ...............................

962

EVAP CANISTER ............................................

962

Component Inspection ...........................................

962

Removal and Installation  .......................................

962

SERVICE DATA AND SPECIFICATIONS 
(SDS) ..........................................................

963

SERVICE DATA AND SPECIFICATIONS 
(SDS) ...............................................................

963

Fuel Pressure  ........................................................

963

Idle Speed and Ignition Timing  ..............................

963

Calculated Load Value  ..........................................

963

Mass Air Flow Sensor ............................................

963

Intake Air Temperature Sensor  .............................

963

Engine Coolant Temperature Sensor  ....................

963

A/F Sensor 1 Heater ..............................................

963

Heated Oxygen sensor 2 Heater  ...........................

964

Crankshaft Position Sensor (POS)  ........................

964

Camshaft Position Sensor (PHASE)  .....................

964

Throttle Control Motor ............................................

964

Fuel Injector ...........................................................

964

Fuel Pump  .............................................................

964

2010 Pathfinder

EC-14

< BASIC INSPECTION >

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DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Trouble Diagnosis Introduction

INFOID:0000000005257025

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 leaks, 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

Overall Sequence

MEF036D

SEF233G

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DIAGNOSIS AND REPAIR WORKFLOW

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Detailed Flow

1.

GET INFORMATION FOR SYMPTOM

*1: Include 1st trip DTC.
*2: Include 1st trip freeze frame data.

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DIAGNOSIS AND REPAIR WORKFLOW

1. Get the detailed information from the customer about the symptom (the condition and the environment

when the incident/malfunction occurred) using the “Diagnostic Work Sheet”.

2. Ask if the customer requests I/M examination.

Malfunction information, obtained>>GO TO 2.

No malfunction information, but a request for I/M examination>>GO TO 13.

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-53, "Emission-related Diagnostic Information"

, .)

-

Study the relationship between the cause detected by DTC and the symptom described by the customer.

(Symptom Table is useful. Refer to 

EC-484, "Symptom Matrix Chart"

.)

3. Check related service bulletins for information.
Are any symptoms described and any DTCs detected?

Symptom is described, DTC is detected>>GO TO 3.

Symptom is described, DTC is not detected>>GO TO 4.

Symptom is not described, DTC is detected>>GO TO 5.

3.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer (except MIL ON).

Also study the normal operation and fail-safe related to the symptom.

Diagnosis Work Sheet is useful to verify the incident.

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.

Also study the normal operation and fail-safe related to the symptom.

Diagnosis Work Sheet is useful to verify the incident.

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 make sure that DTC is

detected again.

If two or more DTCs are detected, refer to 

EC-460, "DTC Inspection Priority Chart"

 and determine trouble

diagnosis order.

NOTE:

• Freeze frame data is useful if the DTC is not detected.

• Perform Component 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 Component Function Check is NG, it is the same as the detection of DTC by DTC CONFIR-

MATION PROCEDURE.

Is DTC detected?

YES

>> GO TO 10.

NO

>> Check according to 

GI-33, "Work Flow"

.

6.

PERFORM BASIC INSPECTION

Perform 

EC-20, "Basic Inspection"

.

Do you have CONSULT-III?

YES

>> GO TO 7.

NO

>> GO TO 9.

2010 Pathfinder

DIAGNOSIS AND REPAIR WORKFLOW

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7.

PERFORM SPEC IN DATA MONITOR MODE

With CONSULT-III

Make sure that “MAS A/F SE-B1”, “MAS A/F SE-B2”, “B/FUEL SCHDL”, “A/F ALPHA-B1”, and “A/F ALPHA-

B2” are within the SP value using CONSULT-III “SPEC” in “DATA MONITOR” mode. Refer to 

EC-89, "Inspec-

tion Procedure"

.

Is the measurement value within the SP value?

YES

>> GO TO 9.

NO

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Detect malfunctioning part according to 

EC-89, "Diagnosis Procedure"

.

Is a malfunctioning part detected?

YES

>> GO TO 11.

NO

>> GO TO 9.

9.

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE

Detect malfunctioning system according to 

EC-484, "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 DIAGNOSIS PROCEDURE

Inspect according to Diagnosis Procedure of the system.

NOTE:

The Diagnosis Procedure in EC section described based on open circuit inspection. A short circuit inspection

is also required for the circuit check in the Diagnosis Procedure. For details, refer to 

GI-33, "Work Flow"

.

Is a malfunctioning part detected?

YES

>> GO TO 11.

NO

>> Monitor input data from related sensors or check voltage of related ECM terminals using CON-

SULT-III. Refer to 

EC-429, "ECM Terminal and Reference Value"

EC-426, "CONSULT-III Refer-

ence Value in Data Monitor Mode"

.

11.

REPAIR OR REPLACE THE MALFUNCTIONING PART

1. Repair or replace the malfunctioning part.

2. Reconnect parts or connectors disconnected during Diagnosis Procedure again after repair and replace-

ment.

3. Check DTC. If DTC is displayed, erase it. Refer to 

EC-53, "Emission-related Diagnostic Information"

.

>> GO TO 12.

12.

FINAL CHECK

When DTC was detected in step 2, perform DTC CONFIRMATION PROCEDURE or Component Function

Check again, and then make sure that the malfunction have been completely repaired.

When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and make sure

that the symptom is not detected.
Is DTC detected and does symptom remain?

YES-1 >> DTC is detected: GO TO 10.

YES-2 >> Symptom remains: GO TO 6.

NO-1 >> No request for I/M examination from the customer: Before returning the vehicle to the customer,

always erase unnecessary DTC in ECM and TCM (Transmission Control Module). Refer to 

EC-

53, "Emission-related Diagnostic Information"

.

NO-2 >>  I/M examination, requested from the customer: GO TO 13.

13.

PREPARE FOR I/M EXAMINATION

1. Set SRT codes. Refer to 

EC-53, "Emission-related Diagnostic Information"

.

2. Erase permanent DTCs. Refer to 

EC-53, "Emission-related Diagnostic Information"

.

2010 Pathfinder

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< BASIC INSPECTION >

[VQ40DE]

DIAGNOSIS AND REPAIR WORKFLOW

>> INSPECTION END

DIAGNOSTIC WORKSHEET

Description

There are many operating conditions that lead to the malfunction of

engine components. A good grasp of such conditions can make trou-

bleshooting faster and more accurate.

In general, each customer feels differently about symptoms. It is

important to fully understand the symptoms or conditions for a cus-

tomer complaint.

Utilize a diagnostic worksheet like the one on the next page in order

to organize all the information for troubleshooting.

Some conditions may cause the MIL to illuminate or blink and DTC

to be detected. Examples:

• Vehicle ran out of fuel, which caused the engine to misfire.

• Fuel filler cap was left off or incorrectly screwed on, allowing fuel to

evaporate into the atmosphere.

SEF907L

2010 Pathfinder

DIAGNOSIS AND REPAIR WORKFLOW

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Worksheet Sample

LEC031A

2010 Pathfinder

 

 

 

 

 

 

 

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