Infiniti QX56 (Z62). Manual — part 857
LAN
LAN-5
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
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 . . . . . .
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 . . . . . .
LAN
PRECAUTIONS
LAN-7
< PRECAUTION >
[CAN FUNDAMENTAL]
C
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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
LAN-9, "CAN COMMUNICATION SYSTEM : CAN Communication Control Circuit"
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