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LAN

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K ELECTRICAL

B
SECTION
LAN SYSTEM C

E
CONTENTS
CAN CHECK SHEET .................................................. 10 . F
CHECK SHEET RESULTS (EXAMPLE) ............ 11 .
PRECAUTIONS ......................................................... 2
. ECM Circuit Check ................................................ 13.
Precautions for Supplemental Restraint System TCM Circuit Check ................................................ 13. G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Combination Meter Circuit Check .......................... 14 .
SIONER" ................................................................. 2
. CAN Communication Circuit Check ....................... 15 .
Precautions For Trouble Diagnosis ......................... 2 . Component Inspection ........................................... 16 .
CAN SYSTEM ...................................................... 2. H
ECM/COMBINATION METER INTERNAL CIR-
Precautions For Harness Repair ............................. 2 . CUIT INSPECTION ............................................ 16 .
CAN SYSTEM ...................................................... 2. CAN SYSTEM (TYPE 2) .......................................... 17 .
Wiring Diagrams and Trouble Diagnosis ................. 3 . System Description ................................................ 17
. I
CAN COMMUNICATION ........................................... 4 . Component Parts and Harness Connector Location 17 ...
System Description ................................................. 4
. Wiring Diagram -- CAN -- .................................... 18 .
CAN Communication Unit ....................................... 4 . Work Flow .............................................................. 19
. J
TYPE 1 ................................................................. 4
. CHECK SHEET .................................................. 20 .
TYPE 2 ................................................................. 6
. CHECK SHEET RESULTS (EXAMPLE) ............ 21 .
CAN SYSTEM (TYPE 1) ............................................ 7 . CAN Communication Circuit Check ....................... 22 .
System Description ................................................. 7
. LAN
Component Inspection ........................................... 25 .
Component Parts and Harness Connector Location 7 ..... ECM/COMBINATION METER INTERNAL CIR-
Wiring Diagram -- CAN -- ...................................... 8 . CUIT INSPECTION ............................................ 25 .
Work Flow ............................................................... 9
. L

LAN-1
PRECAUTIONS
[CAN]
PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS0069T

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
PRECAUTIONS
[CAN]
Wiring Diagrams and Trouble Diagnosis EKS0069S

A
When you read wiring diagrams, refer to the following:
q GI-13, "How to Read Wiring Diagrams"
q PG-3, "POWER SUPPLY ROUTING" for power distribution circuit B
When you perform trouble diagnosis, refer to the following:
q GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES"
q GI-26, "How to Perform Efficient Diagnosis for an Electrical Incident" C
Check for any Service bulletins before servicing the vehicle.

LAN

LAN-3
CAN COMMUNICATION
[CAN]
CAN COMMUNICATION PFP:23710

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-
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.
CAN Communication Unit EKS003K6

Go to CAN system, when selecting your CAN system type from the following table.
Body type Sedan
Axle 2WD
Engine QG18DE/QR25DE
Transmission A/T M/T
CAN system type 1 2
CAN system trouble diagnosis LAN-7, "CAN SYSTEM (TYPE 1)" LAN-17, "CAN SYSTEM (TYPE 2)"

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