Infiniti QX56 (Z62). Manual - part 881

LAN

ITS COMMUNICATION CIRCUIT

LAN-101

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

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5.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the ADAS control unit harness connector and the ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Check the harness and repair the root cause.

6.

CHECK TERMINATION CIRCUIT

1.

Remove the ADAS control unit and the ICC sensor.

2.

Check the resistance between the ADAS control unit terminals.

3.

Check the resistance between the ICC sensor terminals.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace the ADAS control unit and/or the ICC sensor.

7.

CHECK SYMPTOM

Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced. 
Inspection result

Reproduced>>GO TO 8.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is

detected.

8.

CHECK UNIT REPRODUCTION

Perform the reproduction test as per the following procedure for each unit.
1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect one of the unit connectors of ITS communication circuit.
NOTE:
ADAS control unit and ICC sensor have a termination circuit. Check other units first.

4.

Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced. 
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms. 

Inspection result

Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.

ADAS control unit harness connector

Ground

Continuity

Connector No.

Terminal No.

B61

7

Not existed

8

Not existed

ADAS control unit

Resistance (

Ω

)

Terminal No.

7

8

Approx. 108 – 132

ICC sensor

Resistance (

Ω

)

Terminal No.

3

6

Approx. 108 – 132

LAN-102

< PRECAUTION >

[CAN GATEWAY]

PRECAUTIONS

PRECAUTION

PRECAUTIONS

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

INFOID:0000000006238427

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 that 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.

LAN

COMPONENT PARTS

LAN-103

< SYSTEM DESCRIPTION >

[CAN GATEWAY]

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SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000006220574

1.

CAN gateway

A.

Over the glove box

JSMIA0267ZZ

LAN-104

< SYSTEM DESCRIPTION >

[CAN GATEWAY]

SYSTEM

SYSTEM

System Description

INFOID:0000000006220575

• The CAN gateway system communicates between two CAN communication circuits.
• This system selects and transmits only necessary information.

JPMIA1132GB