Nissan Pathfinder. Manual - part 458

EC-138

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SERVICE AFTER REPLACING OR REMOVING ENGINE PARTS

SERVICE AFTER REPLACING OR REMOVING ENGINE PARTS

Description

INFOID:0000000009178072

SPECIAL REPAIR REQUIREMENT

×: Applicable

*1: Harness connector disconnection included.

*2: Replacement of engine with a electric throttle.

Part name

Service performed

Required service

Reference

Replacement

Removal

*1

ECM

×

Additional service when replacing ECM

EC-139

×

Accelerator pedal released position learning

EC-141

Throttle valve closed position learning

EC-142

Idle air volume learning

EC-143

VIN registration

EC-146

Accelerator Pedal

×

×

Accelerator pedal released position learning

EC-141

Electric throttle

×

×

Throttle valve closed position learning

EC-142

×

Idle air volume learning

EC-143

Engine assembly

×

Throttle valve closed position learning

*2

EC-142

Idle air volume learning

*2

EC-143

×

Accelerator pedal released position learning

EC-141

Throttle valve closed position learning

*2

EC-142

ADDITIONAL SERVICE WHEN REPLACING ECM

EC-139

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ADDITIONAL SERVICE WHEN REPLACING ECM

Description

INFOID:0000000009178073

When replacing ECM, the following procedure must be performed. (For details, refer to 

EC-139, "Work Proce-

dure"

.)

PROGRAMMING OPERATION

NOTE:

After replacing with a blank ECM, programming is required to write ECM information. Be sure to follow the pro-

cedure to perform the programming.

BEFORE REPLACEMENT

When replacing ECM, perform “SAVING DATA FOR REPLC CPU” in “WORK SUPPORT” of “ENGINE” by

using CONSULT to save current ECM data before replacement.

AFTER REPLACEMENT

After replacing ECM, the following items must be performed:

• Write data after replace CPU

• Accelerator pedal released position learning

• Throttle valve closed position learning

• Idle air volume learning

Work Procedure

INFOID:0000000009178074

1.

SAVE ECM DATA

With CONSULT

1. Turn ignition switch OFF.

2. Reconnect all harness connectors disconnected.

3. Turn ignition switch ON.

4. Select “SAVING DATA FOR REPLC CPU” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.

5. Follow the instruction of CONSULT display.

NOTE:

• Necessary data in ECM is copied and saved to CONSULT.

• Go to Step 2 regardless of with or without success in saving data.

>> GO TO 2.

2.

CHECK ECM PART NUMBER

Check ECM part number to see whether it is blank ECM or not.

NOTE:

• Part number of blank ECM is 23703 - 

×××××.

• Check part number when ordering ECM or the one included in the label on the container box.
Is the ECM a blank ECM?

YES

>> GO TO 3.

NO

>> GO TO 5.

3.

SAVE ECM PART NUMBER

Read out the part number from the old ECM and save the number, following the programming instructions.

Refer to CONSULT Operation Manual.

NOTE:

• The ECM part number is saved in CONSULT.

• Even when ECM part number is not saved in CONSULT, go to 4.

>> GO TO 4.

4.

PERFORM ECM PROGRAMMING

After replacing ECM, perform the ECM programming. Refer to CONSULT Operation Manual.

NOTE:

• Refer to 

EC-466, "Removal and Installation"

 for replacement of ECM.

EC-140

< BASIC INSPECTION >

[VQ35DE]

ADDITIONAL SERVICE WHEN REPLACING ECM

• During programming, maintain the following conditions:

- Ignition switch: ON

- Electric load: OFF

- Brake pedal: Not depressed

- Battery voltage: 12 – 13.5 V (Be sure to check the value of battery voltage by selecting “BATTERY VOLT” in

“Data monitor” of CONSULT.)

>> GO TO 6.

5.

REPLACE ECM

Replace ECM. Refer to 

EC-466, "Removal and Installation"

.

>> GO TO 6.

6.

PERFORM INITIALIZATION OF IVIS (NATS) SYSTEM AND REGISTRATION OF ALL IVIS (NATS) IGNI-

TION KEY IDS
Refer to 

SEC-74, "ECM : Work Procedure"

.

>> GO TO 7.

7.

CHECK ECM DATA STATUS

Check if the data is successfully copied from the ECM at Step 1 (before replacement) and saved in CONSULT.
Is the data saved successfully?

YES

>> GO TO 8.

NO

>> GO TO 9.

8.

WRITE ECM DATA

With CONSULT

1. Select “WRITING DATA FOR REPLC CPU” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.

2. Follow the instruction of CONSULT display.

NOTE:

The data saved by “SAVING DATA FOR REPLC CPU” is written to ECM.

>> GO TO 10.

9.

PERFORM VIN REGISTRATION

Refer to 

EC-146, "Work Procedure"

.

>> GO TO 10.

10.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Refer to 

EC-141, "Work Procedure"

.

>> GO TO 11.

11.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-142, "Work Procedure"

.

>> GO TO 12.

12.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-143, "Work Procedure"

.

>> END

ACCELERATOR PEDAL RELEASED POSITION LEARNING

EC-141

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ACCELERATOR PEDAL RELEASED POSITION LEARNING

Description

INFOID:0000000009178075

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.

Work Procedure

INFOID:0000000009178076

1.

START

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.

>> END