Nissan Pathfinder (2010 year). Manual - part 302

EC-508

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

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-700, "DTC Confirmation Procedure"

.

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

EC-696, "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-10, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

 (with intelligent key

system), 

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

 (without

intelligent 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-510, "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-511, "Accelerator Pedal Released Position Learning"

.

>> GO TO 12.

12.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-511, "Throttle Valve Closed Position Learning"

.

>> GO TO 13.

13.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-511, "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

2010 Pathfinder

INSPECTION AND ADJUSTMENT

EC-509

< BASIC INSPECTION >

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

Refer to 

EC-510, "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-510, "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-510, "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-181, "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-700, "DTC Confirmation Procedure"

.

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

EC-696, "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-10, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

 (with intelligent key

system), 

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

 (without

intelligent key system).

>> GO TO 4.

19.

INSPECTION END

If ECM is replaced during this Basic Inspection procedure, perform 

EC-510, "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

2010 Pathfinder

EC-510

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

>> INSPECTION END

Idle Speed and Ignition Timing Check

INFOID:0000000005257491

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:0000000005257492

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-10, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

 (with intelli-

gent key system), 

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

(without intelligent key system).

2. Perform 

EC-510, "VIN Registration"

.

3. Perform 

EC-511, "Accelerator Pedal Released Position Learning"

.

4. Perform 

EC-511, "Throttle Valve Closed Position Learning"

.

5. Perform 

EC-511, "Idle Air Volume Learning"

.

VIN Registration

INFOID:0000000005257493

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

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INSPECTION AND ADJUSTMENT

EC-511

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 With CONSULT-III

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

GI-21, "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:0000000005257494

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:0000000005257495

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:0000000005257496

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

2010 Pathfinder

EC-512

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

 With CONSULT-III

1. Perform 

EC-511, "Accelerator Pedal Released Position Learning"

.

2. Perform 

EC-511, "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-511, "Accelerator Pedal Released Position Learning"

.

2. Perform 

EC-511, "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

2010 Pathfinder

INSPECTION AND ADJUSTMENT

EC-513

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13. If idle speed and ignition timing are not within the specifications, Idle Air Volume Learning will not be car-

ried out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-

DURE below.

DIAGNOSTIC PROCEDURE

If idle air volume learning cannot be performed successfully, proceed as per the following:

1.

Check that throttle valve is fully closed.

2.

Check PCV valve operation.

3.

Check that downstream of throttle valve is free from air leakage.

4.

When the above three items check out OK, engine component parts and their installation condi-

tion are questionable. Check and eliminate the cause of the incident.

 

It is useful to perform 

EC-566, "Inspection Procedure"

.

5.

If any of the following conditions occur after the engine has started, eliminate the cause of the

incident and perform Idle Air Volume Learning again:

•

Engine stalls.

•

Erroneous idle.

2010 Pathfinder

EC-514

< FUNCTION DIAGNOSIS >

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ENGINE CONTROL SYSTEM

FUNCTION DIAGNOSIS

ENGINE CONTROL SYSTEM

System Diagram

INFOID:0000000005257497

JMBIA1925GB

2010 Pathfinder

ENGINE CONTROL SYSTEM

EC-515

< FUNCTION DIAGNOSIS >

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Engine Control Component Parts Location

INFOID:0000000005257498

1.

ECM

2.

Battery current sensor

3.

Refrigerant pressure sensor

4.

Power steering pressure sensor

5.

Intake valve timing control solenoid 
valve (bank 2)

6.

Cooling fan motor

7.

Intake valve timing control position 
sensor (bank 2)

8.

Engine coolant temperature sensor

9.

Electric throttle control actuator

10. Intake valve timing control position 

sensor (bank 1)

11. Intake valve timing control solenoid 

valve (bank 1)

12. Camshaft position sensor (PHASE)

13. Mass air flow sensor (with intake air 

temperature sensor)

14. A/F sensor 1 (bank 1)

15. Ignition coil (with power transistor) 

and spark plug (bank 1)

16. EVAP service port 

17. Fuel injector (bank 1)

18. Knock sensor (bank 1)

19. EVAP canister purge volume control 

solenoid valve

20. Knock sensor (bank 2)

21. Fuel injector (bank 2)

22. Ignition coil (with power transistor) 

and spark plug (bank 2)

23. A/F sensor 1 (bank 2)

24. IPDM E/R

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2010 Pathfinder