Nissan Pathfinder: Lan System - Can Fundamental

• Precautions
• Basic Inspection. Diagnosis and Repair Workflow

Precautions Nissan Pathfinder 2025

Precautions for Trouble Diagnosis

CAUTION:

• Never apply 7.0 V or more to the measurement terminal.

• Use a tester with open terminal voltage of 7.0 V or less.

• Turn the ignition switch OFF and disconnect the battery cable from the negative terminal when checking the harness.

Precautions for Harness Repair

• Solder the repaired area and wrap tape around the soldered area.

  

  NOTE:

  A fray of twisted lines must be within 110 mm (4.33 in).

• Bypass connection is never allowed at the repaired area.

  

  NOTE:

  Bypass connection may cause CAN communication error. The spliced wire becomes separated and the characteristics of twisted line are lost.

• Replace the applicable harness as an assembly if error is detected on the shield lines of CAN communication line.

Basic Inspection. Diagnosis and Repair Workflow Nissan Pathfinder 5th Gen

Trouble Diagnosis Flow Chart

DESCRIPTION

DETAIL OF TROUBLE DIAGNOSIS FLOW CHART

INTERVIEW WITH CUSTOMER

Interview with the customer is important to detect the root cause of CAN communication system errors and to understand Nissan Pathfinder vehicle condition and symptoms for proper trouble diagnosis.

Points in interview

• What: Parts name, system name

• When: Date, Frequency

• Where: Road condition, Place

• In what condition: Driving condition/environment

• Result: Symptom

Notes for checking error symptoms:

• Check normal units as well as error symptoms.

  • Example: Circuit between ECM and the combination meter is judged normal if the customer indicates tachometer functions normally.

• When a CAN communication system error is present, multiple control units may malfunction or go into fail-safe mode.

• Indication of the combination meter is important to detect the root cause because it is the most obvious to the customer, and it performs CAN communication with many units.

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GO TO 2.

INSPECTION OF Nissan Pathfinder Vehicle CONDITION

Check whether the symptom is reproduced or not.

NOTE:

Do not turn the ignition switch OFF or disconnect the 12V battery cable while reproducing the error. The error may temporarily correct itself, making it difficult to determine the root cause.

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GO TO 3.

CHECK OF CAN SYSTEM TYPE (HOW TO USE CAN SYSTEM TYPE SPECIFICATION CHART)

Determine CAN system type based on Nissan Pathfinder vehicle equipment.

NOTE:

• This chart is used if CONSULT does not automatically recognize CAN system type.

• There are two styles for CAN system type specification charts. Depending on the number of available system types, either style A or style B may be used.

• CAN System Type Specification Chart (Style A)

  NOTE:

  CAN system type is easily checked with the Nissan Pathfinder vehicle equipment identification information shown in the chart.

  

• CAN System Type Specification Chart (Style B)

  NOTE:

  CAN system type is easily checked with the Nissan Pathfinder vehicle equipment identification information shown in the chart.

  

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GO TO 4.

CREATE INTERVIEW SHEET

Fill out the symptom described by the customer, Nissan Pathfinder vehicle condition, and CAN system type on the interview sheet.

NOTE:

Interview Sheet (Example)

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GO TO 5.

DETECT THE ROOT CAUSE

CAN diagnosis function of CONSULT detects a root cause.

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GO TO 6.

REPAIR OR REPLACE MALFUNCTIONING PART

Repair or replace malfunctioning parts identified by CAN diagnosis function of CONSULT.

Nissan Pathfinder Vehicle CAN communication circuit>>

Refer to Vehicle CAN Communication Circuit.

ITS CAN communication circuit>>

Refer to ITS CAN Communication Circuit.

Chassis CAN communication circuit>>

Refer to Chassis Communication Circuit.

Drivetrain CAN communication circuit>>

Refer to Drivetrain CAN Communication Circuit.

IT CAN communication circuit>>

Refer to IT CAN Communication Circuit.

Engine CAN communication circuit>>

Refer to Engine CAN Communication Circuit.

Diagnostic CAN communication circuit>>

Refer to Diagnostic CAN Communication Circuit.