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LAN

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K ELECTRICAL

B
SECTION
LAN SYSTEM C

E
CONTENTS
CAN CAN Communication Circuit Check ....................... 12 . F
Component Inspection ........................................... 14 .
PRECAUTIONS ......................................................... 2
. ECM/COMBINATION METER INTERNAL CIR-
Precautions for Supplemental Restraint System CUIT INSPECTION ............................................ 14 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- CAN SYSTEM (TYPE 2) .......................................... 15 .
SIONER" ................................................................. 2
. System Description ................................................ 15
.
Precautions For Trouble Diagnosis ......................... 2 . Component Parts and Harness Connector Location 15 ...
CAN SYSTEM ...................................................... 2. H
Wiring Diagram -- CAN -- .................................... 16 .
Precautions For Harness Repair ............................. 2 . Work Flow .............................................................. 17
.
CAN SYSTEM ...................................................... 2. CHECK SHEET .................................................. 17 .
CAN COMMUNICATION ........................................... 3 . CHECK SHEET RESULTS (EXAMPLE) ............ 17 . I
System Description ................................................. 3
. INSPECTION ..................................................... 18 .
CAN Communication Unit ....................................... 3 . CAN Communication Circuit Check ....................... 18 .
TYPE 1 ................................................................. 3
. Component Inspection ........................................... 20 . J
TYPE 2 ................................................................. 5
. ECM/COMBINATION METER INTERNAL CIR-
TYPE 3 ................................................................. 5
. CUIT INSPECTION ............................................ 20 .
CAN SYSTEM (TYPE 1) ............................................ 6 . CAN SYSTEM (TYPE 3) .......................................... 21 .
System Description ................................................. 6
. LAN
System Description ................................................ 21
.
Component Parts and Harness Connector Location 6 ..... Component Parts and Harness Connector Location 21 ...
Wiring Diagram -- CAN -- ...................................... 7 . Wiring Diagram -- CAN -- .................................... 22 .
Work Flow ............................................................... 8
. Work Flow .............................................................. 23
. L
CHECK SHEET .................................................... 9 . CHECK SHEET .................................................. 24 .
CHECK SHEET RESULTS (EXAMPLE) ............ 10 . CHECK SHEET RESULTS (EXAMPLE) ............ 25 .
INSPECTION ..................................................... 10. INSPECTION ..................................................... 25 . M
ECM Circuit Check .................................................11. CAN Communication Circuit Check ....................... 25 .
TCM Circuit Check .................................................11. Component Inspection ........................................... 26 .
Combination Meter Circuit Check ......................... 12 . ECM/TCM INTERNAL CIRCUIT INSPECTION... 26

LAN-1
PRECAUTIONS
[CAN]
PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS003A9

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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:
q 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 per-
formed by an authorized NISSAN/INFINITI dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
q 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
harness connectors.
Precautions For Trouble Diagnosis EKS003AA

CAN SYSTEM
q Do not apply voltage of 7.0V or higher to the measurement terminals.
q Use the tester with its open terminal voltage being 7.0V or less.
Precautions For Harness Repair EKS003AB

CAN SYSTEM
q Solder the repaired parts, and wrap with tape. [Frays of twisted
line must be within 110 mm (4.33 in).]

PKIA0306E

q Do not perform bypass wire connections for the repair parts.
(The spliced wire will become separated and the characteristics
of twisted line will be lost.)

PKIA0307E

LAN-2
CAN COMMUNICATION
[CAN]
CAN COMMUNICATION PFP:23710
A
System Description EKS003K5

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec- B
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. C

CAN Communication Unit EKS003K6

Go to CAN system, when selecting your car model from the following table. D
Body type Sedan
Axle 2WD
E
Engine QG18DE QR25DE
Transmission A/T M/T A/T
CAN communication unit F
ECM

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