Nissan Pathfinder (2012 year). Manual — part 243

INSPECTION AND ADJUSTMENT

EC-25

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[VQ40DE]

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VIN Registration

INFOID:0000000007357946

DESCRIPTION

VIN Registration is an operation 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

With CONSULT

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 instruction on the CONSULT display.

Accelerator Pedal Released Position Learning

INFOID:0000000007357947

DESCRIPTION

Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-

erator 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. Make sure 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:0000000007357948

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 or electric throttle control actuator inside

is cleaned.

OPERATION PROCEDURE

With CONSULT

1. Turn ignition switch ON.

2. Select “CLSD THL POS LEARN” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.

3. Follow the instructions on the CONSULT display.

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

Check that throttle valve moves during the above 10 seconds by confirming the operating sound.

Without CONSULT

1. Start the engine.

NOTE:

Engine coolant temperature is 25

°

C (77

°

F) or less before engine starts.

2. Warm up the engine.

NOTE:

Raise engine coolant temperature until it reaches 65

°

C (149

°

F) or more.

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

Check that throttle valve moves during the above 10 seconds by confirming the operating sound.

Idle Air Volume Learning

INFOID:0000000007357949

DESCRIPTION

Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific

range. It must be performed under the following conditions:

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EC-26

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INSPECTION AND ADJUSTMENT

• Each time electric throttle control actuator or ECM is replaced.

• Idle speed or ignition timing is out of specification.

PREPARATION

Before performing Idle Air Volume Learning, make sure 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 12.9 V (At idle)

• Engine coolant temperature: 70 - 100

°

C (158 - 212

°

F)

• Selector lever: 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 illuminate.

• Steering wheel: Neutral (Straight-ahead position)

• Vehicle speed: Stopped

• Transmission: Warmed-up

- With CONSULT: Drive vehicle until “ATF TEMP SE” in “DATA MONITOR” mode of “A/T” system indicates

less than 0.9 V.

- Without CONSULT: Drive vehicle for 10 minutes.

OPERATION PROCEDURE

With CONSULT

1. Perform

EC-25, "Accelerator Pedal Released Position Learning"

.

2. Perform

EC-25, "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 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 the engine two or three times and make sure that idle speed and ignition timing are within the

specifications.

Without CONSULT

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-25, "Accelerator Pedal Released Position Learning"

.

2. Perform

EC-25, "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. Confirm that accelerator pedal is fully released, then turn ignition switch ON and wait 3 seconds.
7. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.

ITEM

SPECIFICATION

Idle speed

625

±

50 rpm (in P or N position)

Ignition timing

15

±

5

°

BTDC (in P or N position)

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INSPECTION AND ADJUSTMENT

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8. Wait 7 seconds, fully depress the accelerator pedal it for approx. 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 the engine two or three times and make sure that idle speed and ignition timing are within the

specifications.

13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried

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 follows:

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 “TROUBLE DIAGNOSIS - SPECIFICATION VALUE”. Refer to

EC-86

.

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.

•

Incorrect idle.

ITEM

SPECIFICATION

Idle speed

625

±

50 rpm (in P or N position)

Ignition timing

15

±

5

°

BTDC (in P or N position)

SEC897C

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HOW TO SET SRT CODE

HOW TO SET SRT CODE

Description

INFOID:0000000007357950

OUTLINE

In order to set all SRTs, the self-diagnoses as in the “SRT ITEM” table must have been performed at least

once. Each diagnosis may require actual driving for a long period of time under various conditions.

SRT ITEM

The table below shows required self-diagnostic items to set the SRT to “CMPLT”.

• *1: Though displayed on the CONSULT screen, “HO2S HTR” is not SRT item.

• *2: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by

one based on the priority for models with CONSULT.

SRT SERVICE PROCEDURE

If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review

the flowchart diagnostic sequence, referring to the following flowchart.

SRT item

*1

(CONSULT indication)

Performance

Priority

*2

Required self-diagnostic items to set the SRT to “CMPLT”

Corresponding

DTC No.

CATALYST

2

Three way catalyst function

P0420, P0430

EVAP SYSTEM

2

EVAP control system purge flow monitoring

P0441

1

EVAP control system

P0442

2

EVAP control system

P0456

HO2S

1

Air fuel ratio (A/F) sensor 1

P0133, P0153

Heated oxygen sensor 2

P0137, P0157

Heated oxygen sensor 2

P0138, P0158

Heated oxygen sensor 2

P0139, P0159

EGR/VVT SYSTEM

3

Intake value timing control function

P0011, P0021

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HOW TO SET SRT CODE

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SRT Set Driving Pattern

INFOID:0000000007357951

CAUTION:

JSBIA0400GB

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HOW TO SET SRT CODE

Always drive the vehicle in safe manner according to traffic conditions and obey all traffic laws.

*1: Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH), then release the accelerator pedal

and keep it released for more than 10 seconds. Depress the accelerator pedal until vehicle speed is 90 km/h

(56 MPH) again.

*2: Checking the vehicle speed with GST is advised.

• The time required for each diagnosis varies with road surface conditions, weather, altitude, individual driving

habits, etc.

• “Zone A” is the fastest time where required for the diagnosis under normal conditions*. If the diagnosis is not

completed within “Zone A”, the diagnosis can still be performed within “Zone B”.

JPBIA5560GB

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HOW TO SET SRT CODE

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*: Normal conditions

- Sea level

- Flat road

- Ambient air temperature: 20 – 30

°

C (68 – 86

°

F)

NOTE:

Diagnosis is performed as quickly as possible under normal conditions. However, under other conditions,

diagnosis may also be performed. [For example: ambient air temperature other than 20 – 30

°

C (68 – 86

°

F)]

Work Procedure

INFOID:0000000007357952

1.

CHECK DTC

Check DTC.
Is any DTC detected?

YES

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

EC-444, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK SRT STATUS

With CONSULT

Select “SRT STATUS” in “DTC & SRT CONFIRMATION” mode with CONSULT.

Without CONSULT

Perform “SRT status” mode with

EC-74, "On Board Diagnosis Function"

.

With GST

Select Service $01 with GST.
Is SRT code(s) set?

YES

>> GO TO 11.

NO-1 >> With CONSULT: GO TO 3.

NO-2 >> Without CONSULT: GO TO 4.

3.

DTC CONFIRMATION PROCEDURE

1. Select “SRT WORK SUPPORT” in “DTC & SRT CONFIRMATION” mode with CONSULT.

2. For SRT(s) that is not set, perform the corresponding “DTC CONFIRMATION PROCEDURE” according to

the “Performance Priority” in the “SRT ITEM” table. Refer to

EC-28, "Description"

.

3. Check DTC.
Is any DTC detected?

YES

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

EC-444, "DTC Index"

.

NO

>> GO TO 10.

4.

PERFORM ROAD TEST

• Check the “Performance Priority” in the “SRT ITEM” table. Refer to

EC-28, "Description"

.

• Perform the most efficient SRT set driving pattern to set the SRT properly. Refer to

EC-29, "SRT Set Driving

Pattern"

.

In order to set all SRTs, the SRT set driving pattern must be performed at least once.

>> GO TO 5.

5.

PATTERN 1

1. Check the vehicle condition;

-

Engine coolant temperature is

−

10 to 35

°

C (14 to 95

°

F).

-

Fuel tank temperature is more than 0

°

C (32

°

F).

2. Start the engine.

3. Keep engine idling until the engine coolant temperature is greater than 70

°

C (158

°

F)

NOTE:

ECM terminal voltage is follows;

• Engine coolant temperature

-

−

10 to 35

°

C (14 to 95

°

F): 3.0 – 4.3 V

- 70

°

(158

°

F): Less than 4.1 V

• Fuel tank temperature: Less than 1.4 V

Refer to

EC-430, "CONSULT Reference Value in Data Monitor Mode"

.

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HOW TO SET SRT CODE

>> GO TO 6.

6.

PATTERN 2

1. Drive the vehicle. And depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH), then

release the accelerator pedal and keep it released for more than 10 seconds.

2. Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH) again

NOTE:

• Checking the vehicle speed with GST is advised.

• When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted.

In this case, the time required for diagnosis may be extended.

>> GO TO 7.

7.

PATTERN 3

• Operate vehicle following the driving pattern shown in the figure.

• Release the accelerator pedal during deceleration of vehicle speed

from 90 km/h (56 MPH) to 0 km/h (0 MPH).

>> GO TO 8.

8.

PATTERN 4

• Operate vehicle, following the driving pattern shown in the figure.

- Drive the vehicle in a proper gear at 60 km/h (38 MPH) and main-

tain the speed.

- Release the accelerator pedal fully at least 5 seconds.

- Repeat the above two steps at least 5 times.

>> GO TO 9.

9.

PATTERN 5

• The accelerator pedal must be held very steady during steady-state driving.

• If the accelerator pedal is moved, the test must be conducted again.

>> GO TO 10.

10.

CHECK SRT STATUS

With CONSULT

Select “SRT STATUS” in “DTC & SRT CONFIRMATION” mode with CONSULT.

Without CONSULT

Perform “SRT status” mode with

EC-74, "On Board Diagnosis Function"

.

With GST

Select Service $01 with GST.
Is SRT(s) set?

YES

>> GO TO 11.

NO

>> Call TECH LINE or take appropriate action.

11.

CHECK PERMANENT DTC

PBIB2244E

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