Nissan Pathfinder (2009 year). Instruction — part 310

EC-494

< BASIC INSPECTION >

[VK56DE]

DIAGNOSIS AND REPAIR WORK FLOW

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 Worksheet Sample below 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.

Worksheet Sample

SEF907L

MTBL0017

2009 Pathfinder

INSPECTION AND ADJUSTMENT

EC-495

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

Basic Inspection

INFOID:0000000003936453

1.

INSPECTION START

1.

Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.

2.

Open engine hood and check the following:

-

Harness connectors for improper connections

-

Wiring harness for improper connections, pinches and cut

-

Vacuum hoses for splits, kinks and improper connections

-

Hoses and ducts for leakage

-

Air cleaner clogging

-

Gasket

3.

Check that electrical or mechanical loads are not applied.

-

Headlamp switch is OFF.

-

Air conditioner switch is OFF.

-

Rear window defogger switch is OFF.

-

Steering wheel is in the straight-ahead position, etc.

4.

Start engine and warm it up until engine coolant temperature
indicator points to the middle of gauge.
Check that engine stays below 1,000 rpm.

5.

Run engine at approximately 2,000 rpm for approximately 2 min-
utes under no load.

6.

Check that no DTC is displayed with CONSULT-III or GST.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

REPAIR OR REPLACE

Repair or replace components as necessary according to corresponding Diagnostic Procedure.

>> GO TO 3.

3.

CHECK TARGET IDLE SPEED

With CONSULT-III

1.

Run engine at approximately 2,000 rpm for approximately 2 minutes under no load.

SEF983U

SEF976U

SEF977U

2009 Pathfinder

EC-496

< BASIC INSPECTION >

[VK56DE]

INSPECTION AND ADJUSTMENT

2.

Rev engine between 2,000 and 3,000 rpm 2 or 3 times under no
load, then run engine at idle speed for approximately 1 minute.

3.

Read idle speed in “DATA MONITOR” mode with CONSULT-III.
Refer to

EC-499, "Idle Speed and Ignition Timing Check"

.

Without CONSULT-III

1.

Run engine at approximately 2,000 rpm for approximately 2 minutes under no load.

2.

Rev engine between 2,000 and 3,000 rpm 2 or 3 times under no load, then run engine at idle speed for
approximately 1 minute.

3.

Check idle speed.
Refer to

EC-499, "Idle Speed and Ignition Timing Check"

.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 4.

4.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.

Stop engine.

2.

Perform

EC-500, "Accelerator Pedal Released Position Learning"

.

>> GO TO 5.

5.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform

EC-500, "Throttle Valve Closed Position Learning"

.

>> GO TO 6.

6.

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-500, "Idle Air Volume Learning"

.

Is Idle Air Volume Learning carried out successfully?

Yes or No

Yes

>> GO TO 7.

No

>> 1.

Follow the instructions of Idle Air Volume Learning.

2.

GO TO 4.

7.

CHECK TARGET IDLE SPEED AGAIN

With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Read idle speed in “DATA MONITOR” mode with CONSULT-III.
Refer to

EC-499, "Idle Speed and Ignition Timing Check"

.

Without CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Check idle speed.
Refer to

EC-499, "Idle Speed and Ignition Timing Check"

.

OK or NG

650

±

50 rpm (in P or N position)

PBIA8513J

650

±

50 rpm (in P or N position)

650

±

50 rpm (in P or N position)

650

±

50 rpm (in P or N position)

2009 Pathfinder

INSPECTION AND ADJUSTMENT

EC-497

< BASIC INSPECTION >

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OK

>> GO TO 10.

NG

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART

Check the following.
• Check camshaft position sensor (PHASE) and circuit. Refer to

EC-691, "DTC Confirmation Procedure"

.

• Check crankshaft position sensor (POS) and circuit. Refer to

EC-687, "DTC Confirmation Procedure"

.

OK or NG

OK

>> GO TO 9.

NG

>> 1.

Repair or replace malfunctioning part.

2.

GO TO 4.

9.

CHECK ECM FUNCTION

1.

Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident,
but this is rare.)

2.

Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to

SEC-8, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

(with intelligent key sys-

tem),

SEC-124, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

(without intelli-

gent key system).

>> GO TO 4.

10.

CHECK IGNITION TIMING

1.

Run engine at idle.

2.

Check ignition timing with a timing light.
Refer to

EC-499, "Idle Speed and Ignition Timing Check"

.

OK or NG

OK

>> GO TO 19.

NG

>> GO TO 11.

11.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.

Stop engine.

2.

Perform

EC-500, "Accelerator Pedal Released Position Learning"

.

>> GO TO 12.

12.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform

EC-500, "Throttle Valve Closed Position Learning"

.

>> GO TO 13.

13.

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-500, "Idle Air Volume Learning"

.

Is Idle Air Volume Learning carried out successfully?

Yes or No

Yes

>> GO TO 14.

No

>> 1.

Follow the instructions of Idle Air Volume Learning.

2.

GO TO 4.

14.

CHECK TARGET IDLE SPEED AGAIN

With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

15

±

5

°

BTDC (in P or N position)

BBIA0379E

2009 Pathfinder

EC-498

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

2.

Read idle speed in “DATA MONITOR” mode with CONSULT-III.
Refer to

EC-499, "Idle Speed and Ignition Timing Check"

.

Without CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Check idle speed.
Refer to

EC-499, "Idle Speed and Ignition Timing Check"

.

OK or NG

OK

>> GO TO 15.

NG

>> GO TO 17.

15.

CHECK IGNITION TIMING AGAIN

1.

Run engine at idle.

2.

Check ignition timing with a timing light.
Refer to

EC-499, "Idle Speed and Ignition Timing Check"

.

OK or NG

OK

>> GO TO 19.

NG

>> GO TO 16.

16.

CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to

EM-187, "Removal and Installation"

.

OK or NG

OK

>> GO TO 17.

NG

>> 1.

Repair the timing chain installation.

2.

GO TO 4.

17.

DETECT MALFUNCTIONING PART

Check the following.
• Check camshaft position sensor (PHASE) and circuit. Refer to

EC-691, "DTC Confirmation Procedure"

.

• Check crankshaft position sensor (POS) and circuit. Refer to

EC-687, "DTC Confirmation Procedure"

.

OK or NG

OK

>> GO TO 18.

NG

>> 1.

Repair or replace.

2.

GO TO 4.

18.

CHECK ECM FUNCTION

1.

Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident,
although this is rare.)

2.

Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to

SEC-8, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

(with intelligent key sys-

tem),

SEC-124, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

(without intelli-

gent key system).

>> GO TO 4.

19.

INSPECTION END

If ECM is replaced during this Basic Inspection procedure, perform

EC-499, "Procedure After Replacing

ECM"

.

650

±

50 rpm (in P or N position)

650

±

50 rpm (in P or N position)

15

±

5

°

BTDC (in P or N position)

BBIA0379E

2009 Pathfinder

INSPECTION AND ADJUSTMENT

EC-499

< BASIC INSPECTION >

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>> INSPECTION END

Idle Speed and Ignition Timing Check

INFOID:0000000003936454

IDLE SPEED

With CONSULT-III

Check idle speed in “DATA MONITOR” mode with CONSULT-III.

With GST

Check idle speed with GST.

IGNITION TIMING

1.

Attach timing light to loop wire as shown.

2.

Check ignition timing.

Procedure After Replacing ECM

INFOID:0000000003936455

When replacing ECM, the following procedure must be performed.

1.

Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs.
Refer to

SEC-8, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

(with intelligent

key system),

SEC-124, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

(without

intelligent key system).

2.

Perform

EC-499, "VIN Registration"

.

3.

Perform

EC-500, "Accelerator Pedal Released Position Learning"

.

4.

Perform

EC-500, "Throttle Valve Closed Position Learning"

.

5.

Perform

EC-500, "Idle Air Volume Learning"

.

VIN Registration

INFOID:0000000003936456

DESCRIPTION

VIN Registration is a function of ECM to register VIN in ECM. It must be performed each time ECM is
replaced.
NOTE:
Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M).

OPERATION PROCEDURE

BBIA0377E

BBIA0379E

2009 Pathfinder

EC-500

< BASIC INSPECTION >

[VK56DE]

INSPECTION AND ADJUSTMENT

With CONSULT-III

1.

Check the VIN of the vehicle and note it. Refer to

GI-33, "Identification Number"

.

2.

Turn ignition switch ON with engine stopped.

3.

Select “VIN REGISTRATION” in “WORK SUPPORT” mode.

4.

Follow the instructions on the CONSULT-III display.

Accelerator Pedal Released Position Learning

INFOID:0000000003936457

DESCRIPTION

Accelerator Pedal Released Position Learning is a function of ECM to learn the fully released position of the
accelerator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each
time the harness connector of the accelerator pedal position sensor or ECM is disconnected.

OPERATION PROCEDURE

1.

Check that accelerator pedal is fully released.

2.

Turn ignition switch ON and wait at least 2 seconds.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Turn ignition switch ON and wait at least 2 seconds.

5.

Turn ignition switch OFF and wait at least 10 seconds.

Throttle Valve Closed Position Learning

INFOID:0000000003936458

DESCRIPTION

Throttle Valve Closed Position Learning is a function of ECM to learn the fully closed position of the throttle
valve by monitoring the throttle position sensor output signal. It must be performed each time the harness con-
nector of the electric throttle control actuator or ECM is disconnected.

OPERATION PROCEDURE

1.

Check that accelerator pedal is fully released.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF wait at least 10 seconds.
heck that throttle valve moves during above 10 seconds by confirming the operating sound.

Idle Air Volume Learning

INFOID:0000000003936459

DESCRIPTION

Idle Air Volume Learning is a function of ECM to learn the idle air volume that keeps engine idle speed within
the specific range. It must be performed under the following conditions:
• Each time the electric throttle control actuator or ECM is replaced.
• Idle speed or ignition timing is out of the specification.

PREPARATION

Before performing Idle Air Volume Learning, check that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.
• Battery voltage: More than 12.9V (At idle)
• Engine coolant temperature: 70 - 100

°

C (158 - 212

°

F)

• Selector lever position: P or N
• Electric load switch: OFF

(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
started the headlamp will not be illuminated.

• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- With CONSULT-III: Drive vehicle until “ATF TEMP SE 1” in “DATA MONITOR” mode of “A/T” system indi-

cates less than 0.9 V.

- Without CONSULT-III: Drive vehicle for 10 minutes.

OPERATION PROCEDURE

2009 Pathfinder

INSPECTION AND ADJUSTMENT

EC-501

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With CONSULT-III

1.

Perform

EC-500, "Accelerator Pedal Released Position Learning"

.

2.

Perform

EC-500, "Throttle Valve Closed Position Learning"

.

3.

Start engine and warm it up to normal operating temperature.

4.

Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.

5.

Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.

6.

Touch “START” and wait 20 seconds.

7.

Check that “CMPLT” is displayed on CONSULT-III screen. If “CMPLT” is not displayed, Idle Air Volume
Learning will not be carried out successfully. In this case, find the cause of the incident by referring to the
DIAGNOSTIC PROCEDURE below.

8.

Rev up engine 2 or 3 times and check that idle speed and ignition timing are within the specifications.

Without CONSULT-III

NOTE:
• It is better to count the time accurately with a clock.
• It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has

a malfunction.

1.

Perform

EC-500, "Accelerator Pedal Released Position Learning"

.

2.

Perform

EC-500, "Throttle Valve Closed Position Learning"

.

3.

Start engine and warm it up to normal operating temperature.

4.

Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.

5.

Turn ignition switch OFF and wait at least 10 seconds.

6.

Check that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.

7.

Repeat the following procedure quickly 5 times within 5 seconds.

a.

Fully depress the accelerator pedal.

b.

Fully release the accelerator pedal.

8.

Wait 7 seconds, fully depress the accelerator pedal for approximately 20 seconds until the MIL stops
blinking and turns ON.

9.

Fully release the accelerator pedal within 3 seconds after the MIL turns ON.

10. Start engine and let it idle.

11. Wait 20 seconds.

12. Rev up engine 2 or 3 times and check that idle speed and ignition timing are within the specifications.

ITEM

SPECIFICATION

Idle speed

650

±

50 rpm (in P or N position)

Ignition timing

15

±

5

°

BTDC (in P or N position)

ITEM

SPECIFICATION

Idle speed

650

±

50 rpm (in P or N position)

Ignition timing

15

±

5

°

BTDC (in P or N position)

SEC897C

2009 Pathfinder