Infiniti QX56 (JA60). Manual - part 659

LAN

DIAGNOSIS AND REPAIR WORKFLOW

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< BASIC INSPECTION >

[CAN FUNDAMENTAL]

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PKID1225E

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< HOW TO USE THIS MANUAL >

[CAN]

HOW TO USE THIS SECTION

HOW TO USE THIS MANUAL

HOW TO USE THIS SECTION

Caution

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• This section describes information peculiar to a vehicle, sheets for trouble diagnosis, and inspection proce-

dures.

• For trouble diagnosis procedure, refer to 

LAN-14, "Trouble Diagnosis Procedure"

.

Abbreviation List

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Abbreviations in CAN communication signal chart, and the diagnosis sheet are as per the following list.

Abbreviation

Unit name

SELECT SYSTEM

(CONSULT-III)

CAN DIAG SUPPORT MNTR

(CONSULT-III)

4WD

Transfer control unit

ALL MODE AWD/4WD

AWD/4WD

A-BAG

Air bag diagnosis sensor unit

AIR BAG

—

ABS

ABS actuator and electric unit (control unit)

ABS

VDC/TCS/ABS

ADP

Driver seat control unit

AUTO DRIVE POS.

—

AV

AV control unit

MULTI AV

DISPLAY

BCM

BCM

BCM

BCM/SEC

DLC

Data link connector

—

—

ECM

ECM

ENGINE

ECM

HVAC

A/C auto amp.

HVAC

—

ICC

ICC unit

ICC

ICC

ICC/e4WD

I-KEY

Intelligent Key unit

INTELLIGENT KEY

I-KEY

IPDM-E

IPDM E/R

IPDM E/R

IPDM E/R

LASER

ICC sensor

—

ICC SENSOR

M&A

Combination meter

METER/M&A

METER/M&A

STRG

Steering angle sensor

—

STRG

TCM

TCM

TRANSMISSION

TCM

LAN

PRECAUTIONS

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< PRECAUTION >

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

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The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along

with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain

types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS

system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front

air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this

Service Manual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by

an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the “SRS AIR BAG”.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-

ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)

with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly

causing serious injury.

• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precautions for Trouble Diagnosis

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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

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• 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).

SKIB8766E

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< PRECAUTION >

[CAN]

PRECAUTIONS

• 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 communica-

tion line.

SKIB8767E