Index Infiniti Infiniti QX56 (Z62) - service repair manual 2011 year

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Infiniti QX56 (Z62). Manual - part 857

LAN

LAN-5

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Diagnosis Procedure .............................................

4WD BRANCH LINE CIRCUIT .........................

Diagnosis Procedure .............................................

ABS BRANCH LINE CIRCUIT .........................

Diagnosis Procedure .............................................

TCM BRANCH LINE CIRCUIT .........................

Diagnosis Procedure .............................................

A-BAG BRANCH LINE CIRCUIT .....................

Diagnosis Procedure .............................................

AV BRANCH LINE CIRCUIT ............................

Diagnosis Procedure .............................................

BCM BRANCH LINE CIRCUIT ........................

Diagnosis Procedure .............................................

DLC BRANCH LINE CIRCUIT .........................

Diagnosis Procedure .............................................

HVAC BRANCH LINE CIRCUIT ......................

Diagnosis Procedure .............................................

M&A BRANCH LINE CIRCUIT ........................

Diagnosis Procedure .............................................

STRG BRANCH LINE CIRCUIT .......................

Diagnosis Procedure .............................................

TPMS BRANCH LINE CIRCUIT .......................

Diagnosis Procedure .............................................

IPDM-E BRANCH LINE CIRCUIT ....................

Diagnosis Procedure .............................................

ADP BRANCH LINE CIRCUIT .........................

Diagnosis Procedure .............................................

E-SUS BRANCH LINE CIRCUIT ......................

Diagnosis Procedure .............................................

PWBD BRANCH LINE CIRCUIT ......................

Diagnosis Procedure .............................................

CAN COMMUNICATION CIRCUIT ..................

Diagnosis Procedure .............................................

CAN SYSTEM (TYPE 4)

DTC/CIRCUIT DIAGNOSIS .......................

MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT ..................................................................

Diagnosis Procedure .............................................

MAIN LINE BETWEEN ADP AND PWBD CIR-
CUIT ..................................................................

Diagnosis Procedure .............................................

MAIN LINE BETWEEN RDR-R AND RDR-L
CIRCUIT ...........................................................

Diagnosis Procedure .............................................

MAIN LINE BETWEEN RDR-L AND LANE
CIRCUIT ..........................................................

Diagnosis Procedure .............................................

MAIN LINE BETWEEN LANE AND APA CIR-
CUIT ................................................................

Diagnosis Procedure .............................................

ECM BRANCH LINE CIRCUIT .......................

Diagnosis Procedure .............................................

4WD BRANCH LINE CIRCUIT .......................

Diagnosis Procedure .............................................

ABS BRANCH LINE CIRCUIT ........................

Diagnosis Procedure .............................................

TCM BRANCH LINE CIRCUIT ........................

Diagnosis Procedure .............................................

A-BAG BRANCH LINE CIRCUIT ....................

Diagnosis Procedure .............................................

AFS BRANCH LINE CIRCUIT ........................

Diagnosis Procedure .............................................

AV BRANCH LINE CIRCUIT ..........................

Diagnosis Procedure .............................................

BCM BRANCH LINE CIRCUIT .......................

Diagnosis Procedure .............................................

CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 1) ..............................

Diagnosis Procedure .............................................

CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 2) ..............................

Diagnosis Procedure .............................................

DLC BRANCH LINE CIRCUIT ........................

Diagnosis Procedure .............................................

HVAC BRANCH LINE CIRCUIT .....................

Diagnosis Procedure .............................................

M&A BRANCH LINE CIRCUIT .......................

Diagnosis Procedure .............................................

STRG BRANCH LINE CIRCUIT .....................

Diagnosis Procedure .............................................

TPMS BRANCH LINE CIRCUIT .....................

Diagnosis Procedure .............................................

IPDM-E BRANCH LINE CIRCUIT ...................

Diagnosis Procedure .............................................

ADP BRANCH LINE CIRCUIT ........................

Diagnosis Procedure .............................................

LAN-6

PSB BRANCH LINE CIRCUIT .........................

Diagnosis Procedure .............................................

E-SUS BRANCH LINE CIRCUIT .....................

Diagnosis Procedure .............................................

ICC BRANCH LINE CIRCUIT ..........................

Diagnosis Procedure .............................................

PWBD BRANCH LINE CIRCUIT .....................

Diagnosis Procedure .............................................

RDR-R BRANCH LINE CIRCUIT ....................

Diagnosis Procedure .............................................

RDR-L BRANCH LINE CIRCUIT .....................

Diagnosis Procedure .............................................

LANE BRANCH LINE CIRCUIT .......................

Diagnosis Procedure .............................................

APA BRANCH LINE CIRCUIT .........................

Diagnosis Procedure .............................................

LASER BRANCH LINE CIRCUIT .....................

Diagnosis Procedure .............................................

CAN COMMUNICATION CIRCUIT 1 ...............

Diagnosis Procedure .............................................

CAN COMMUNICATION CIRCUIT 2 ...............

Diagnosis Procedure .............................................

ITS COMMUNICATION CIRCUIT .....................

Diagnosis Procedure .............................................

LAN

PRECAUTIONS

LAN-7

< PRECAUTION >

[CAN FUNDAMENTAL]

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PRECAUTION

PRECAUTIONS

Precautions for Trouble Diagnosis

INFOID:0000000006220510

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

INFOID:0000000006220511

• 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 communica-

tion line.

SKIB8766E

SKIB8767E

LAN-8

< SYSTEM DESCRIPTION >

[CAN FUNDAMENTAL]

SYSTEM

SYSTEM DESCRIPTION

SYSTEM

CAN COMMUNICATION SYSTEM

CAN COMMUNICATION SYSTEM : System Description

INFOID:0000000006220512

• CAN communication is a multiplex communication system. This enables the system to transmit and receive

large quantities of data at high speed by connecting control units with two communication lines (CAN-H and
CAN-L).

• Control units on the CAN network transmit signals using the CAN communication control circuit. They

receive only necessary signals from other control units to operate various functions.

• CAN communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.

CAN COMMUNICATION SYSTEM : System Diagram

INFOID:0000000006220513

Each control unit passes an electric current to the termination circuits when transmitting CAN communication
signal. The termination circuits produce an electrical potential difference between CAN-H and CAN-L. CAN
communication system transmits and receives CAN communication signals by the potential difference.

SKIB8887E

Component

Description

Main line

CAN communication line between splices

Branch line

CAN communication line between splice and a control unit

Splice

A point connecting a branch line with a main line

Termination circuit

Refer to

LAN-9, "CAN COMMUNICATION SYSTEM : CAN Communication Control Circuit"

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