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LAN

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K ELECTRICAL

SECTION LAN LAN SYSTEM
B

E
CONTENTS
CAN MNTR" SCREEN FOR TCM ............................... 13 . F
CAN COMMUNICATION .......................................... 14 .
PRECAUTIONS ......................................................... 2 . System Description ................................................ 14
.
Precautions for Supplemental Restraint System Component Parts and Harness Connector Location 14 ... G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Schematic .............................................................. 15
.
SIONER" ................................................................. 2
. Wiring Diagram -- CAN -- .................................... 16 .
Precautions For Trouble Diagnosis ......................... 2 . CAN Communication Unit ...................................... 17 .
CAN SYSTEM ...................................................... 2 . H
TYPE 1 ............................................................... 17
.
Precautions For Harness Repair ............................. 2 . TYPE 2 ............................................................... 18
.
CAN SYSTEM ...................................................... 2 . CAN SYSTEM (TYPE 1) .......................................... 19 .
TROUBLE DIAGNOSES WORK FLOW ................... 3 . Component Parts and Harness Connector Location 19 ... I
When Displaying CAN Communication System Schematic .............................................................. 19
.
Errors ...................................................................... 3
. Wiring Diagram -- CAN -- .................................... 19 .
WHEN A MALFUNCTION IS DETECTED BY CHECK SHEET ..................................................... 20 . J
CAN COMMUNICATION SYSTEM ...................... 3 . CHECK SHEET RESULTS (EXAMPLE) ............ 21 .
WHEN A MALFUNCTION IS DETECTED CAN SYSTEM (TYPE 2) .......................................... 23 .
EXCEPT CAN COMMUNICATION SYSTEM ....... 3 . Component Parts and Harness Connector Location 23 ...
TROUBLE DIAGNOSIS FLOW CHART .............. 4 . LAN
Schematic .............................................................. 23
.
Diagnosis Procedure ............................................... 5 . Wiring Diagram -- CAN -- .................................... 23 .
SELECTING CAN SYSTEM TYPE (HOW TO CHECK SHEET ..................................................... 24 .
USE SPECIFICATION TABLE) ............................ 5 . CHECK SHEET RESULTS (EXAMPLE) ............ 25 . L
ACQUISITION OF DATA BY CONSULT-II ........... 6 . TROUBLE DIAGNOSIS FOR SYSTEM ................... 26 .
HOW TO USE CHECK SHEET TABLE ............... 7 . ECM Circuit Inspection .......................................... 26 .
CAN Diagnostic Support Monitor .......................... 12 . TCM Circuit Inspection .......................................... 26 . M
DESCRIPTION OF "CAN DIAG SUPPORT Combination Meter Circuit Inspection .................... 27 .
MNTR" SCREEN FOR ECM .............................. 12 . CAN Communication Circuit Inspection ................ 28 .
DESCRIPTION OF "CAN DIAG SUPPORT

Revision: December 2006 LAN-1 2006 Sentra
PRECAUTIONS
[CAN]
PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" UKS0024Z

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:
G 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.
G 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.
G 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 UKS00250

CAN SYSTEM
G Do not apply voltage of 7.0 V or higher to the measurement terminals.
G Use the tester with its open terminal voltage being 7.0 V or less.
G Be sure to turn ignition switch off and disconnect battery cable at negative terminal before checking the
circuit.
Precautions For Harness Repair UKS00251

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

PKIA0306E

G 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

Revision: December 2006 LAN-2 2006 Sentra
TROUBLE DIAGNOSES WORK FLOW
[CAN]
TROUBLE DIAGNOSES WORK FLOW PFP:00004
A
When Displaying CAN Communication System Errors UKS004TZ

WHEN A MALFUNCTION IS DETECTED BY CAN COMMUNICATION SYSTEM
G CAN communication line is open. (CAN H, CAN L, or both) B
G CAN communication line is shorted. (Ground, between CAN lines, or other harnesses)
G The areas related to CAN communication of unit is malfunctioning.
WHEN A MALFUNCTION IS DETECTED EXCEPT CAN COMMUNICATION SYSTEM C
G Removal and installation of parts: When the units that perform CAN communication or the sensors related
to CAN communication are removed and installed, malfunction may be detected (or DTC other than CAN
communication may be detected). D
G Fuse blown out (removed): CAN communication of the unit may be stopped at such time.
G Low voltage: If the voltage decreases because of battery discharge when IGN is ON, malfunction may be
detected by self-diagnosis according to the units. E

LAN

Revision: December 2006 LAN-3 2006 Sentra
TROUBLE DIAGNOSES WORK FLOW
[CAN]
TROUBLE DIAGNOSIS FLOW CHART
Depending on the control unit which performs CAN communication, "U1010" may be indicated as the result of
self-diagnosis. Replace the control unit if "U1010" is indicated.

PKIC4388E

G Step 1: Refer to LAN-5, "SELECTING CAN SYSTEM TYPE (HOW TO USE SPECIFICATION TABLE)" .
G Step 2: Refer to LAN-6, "ACQUISITION OF DATA BY CONSULT-II" .
G Step 3: Refer to LAN-7, "HOW TO USE CHECK SHEET TABLE" .
G Step 4: Refer to LAN-8, "Example of Filling in Check Sheet When Initial Conditions Are Reproduced" .
G Step 5: Refer to LAN-26, "TROUBLE DIAGNOSIS FOR SYSTEM" .

Revision: December 2006 LAN-4 2006 Sentra
TROUBLE DIAGNOSES WORK FLOW
[CAN]
Diagnosis Procedure UKS004U0

SELECTING CAN SYSTEM TYPE (HOW TO USE SPECIFICATION TABLE) A
Determine CAN system type from the equipment of the vehicle to select applicable check sheet.

G
PKIC4389E

LAN

Revision: December 2006 LAN-5 2006 Sentra
TROUBLE DIAGNOSES WORK FLOW
[CAN]
ACQUISITION OF DATA BY CONSULT-II
Attach the data acquired by CONSULT-II on the check sheet determined according to CAN system type.

PKIC4390E

Revision: December 2006 LAN-6 2006 Sentra
TROUBLE DIAGNOSES WORK FLOW
[CAN]
HOW TO USE CHECK SHEET TABLE
A

PKIC4391E
F
1. Unit names displayed on CONSULT-II
2. "NG": Display "NG" when malfunction is detected in the initial diagnosis of the diagnosed unit. Replace the
unit if "NG" is displayed.
G
"

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