Infiniti F50. Manual - part 618

 

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Infiniti F50. Manual - part 618

 

 

LAN-1

LAN SYSTEM

K  ELECTRICAL

CONTENTS

C

D

E

F

G

H

I

J

L

M

SECTION 

A

B

LAN

LAN SYSTEM

LAN

PRECAUTIONS .......................................................... 3

Precautions for Supplemental Restraint System 
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3

IVMS (LAN) ................................................................. 4

Overall Description ................................................... 4

OUTLINE ............................................................... 4
BCM (BODY CONTROL MODULE) ...................... 4
LCU (LOCAL CONTROL UNIT) ............................ 4
CONTROLLED SYSTEMS  ................................... 4

Component Parts and Harness Connector Location 

..... 5

Sleep/Wake-up Control  ............................................ 5

SLEEP CONTROL  ................................................ 5
WAKE-UP CONTROL  ........................................... 6

Fail-safe System  ...................................................... 6
CONSULT-II Function  .............................................. 6

DIAGNOSTIC ITEMS DESCRIPTION  .................. 6
DIAGNOSTIC ITEMS APPLICATION  ................... 7

On Board Diagnosis  ................................................. 7

DIAGNOSIS ITEM ................................................. 7

Schematic ................................................................ 8

POWER SUPPLY, GROUND AND COMMUNI-
CATION CIRCUITS ............................................... 8

Wiring Diagram - COMM - ........................................ 9

POWER SUPPLY, GROUND AND COMMUNI-
CATION CIRCUITS ............................................... 9

Schematic - BCM -  ................................................. 14
Schematic - LCU01 -  .............................................. 16

DRIVER'S DOOR CONTROL UNIT .................... 16

Schematic - LCU02 -  .............................................. 17

DRIVER'S SEAT CONTROL UNIT  ..................... 17

Schematic - LCU03 -  .............................................. 18

DRIVER'S SIDE DOOR MIRROR CONTROL 
UNIT .................................................................... 18

Schematic - LCU04 -  .............................................. 19

PASSENGER SIDE DOOR MIRROR CONTROL 
UNIT .................................................................... 19

CAN

PRECAUTIONS ........................................................ 20

Precautions for Supplemental Restraint System 
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................. 20
Precautions For Trouble Diagnosis  ........................ 20

CAN SYSTEM  ..................................................... 20

Precautions For Harness Repair  ............................ 20

CAN SYSTEM  ..................................................... 20

CAN COMMUNICATION ........................................... 21

System Description ................................................. 21

FOR VDC MODELS  ............................................ 21
FOR ICC MODELS  ............................................. 22

CAN SYSTEM (FOR VDC MODELS)  ....................... 24

System Description ................................................. 24
Component Parts and Harness Connector Location 

... 24

Wiring Diagram — CAN —  ..................................... 25
Work Flow ............................................................... 27

CHECK SHEET  ................................................... 28
CHECK SHEET RESULTS (EXAMPLE)  ............. 29
INSPECTION ...................................................... 30

Circuit Check Between VDC/TCS/ABS Control Unit 
and Steering Angle Sensor ..................................... 30
Circuit Check Between Steering Angle Sensor and 
Combination Meter  ................................................. 32
ECM Circuit Check  ................................................. 33
VDC/TCS/ABS Control Unit Circuit Check  ............. 33
Steering Angle Sensor Circuit Check  ..................... 34
Combination Meter Circuit Check ........................... 34
TCM Circuit Check  ................................................. 35
CAN Communication Circuit Check ........................ 35
Component Inspection ............................................ 39

ECM/TCM INTERNAL CIRCUIT INSPECTION ... 39

CAN SYSTEM (FOR ICC MODELS)  ........................ 40

System Description ................................................. 40
Component Parts and Harness Connector Location 

... 40

Schematic ............................................................... 41
Wiring Diagram — CAN —  ..................................... 42
Work Flow ............................................................... 45

CHECK SHEET  ................................................... 46

PRECAUTIONS

LAN-3

[LAN]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

[LAN]

PRECAUTIONS

PFP:00001

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

EKS006SI

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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.

WARNING:

●

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.

●

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.

●

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.

LAN-4

[LAN]

IVMS (LAN)

IVMS (LAN)

PFP:28491

Overall Description

EKS001PD

OUTLINE

The In-Vehicle Multiplexing System, IVMS (LAN system), consists of a BCM (Body Control Module) and four
LCUs (Local Control Units). Some switches and electrical loads are connected to each LCU. Some electrical
systems are directly connected to the BCM. Control of each LCU, (which is provided by a switch and electrical
load), is accomplished by the BCM, via multiplex data lines (A-1, A-2 or A-3) connected between them.

BCM (BODY CONTROL MODULE)

The BCM, which is a master unit of the IVMS (LAN), consists of microprocessor, memory and communication
LSI sections and has communication and control functions. It receives data signals from the LCUs and sends
electrical load data signals to them.

LCU (LOCAL CONTROL UNIT)

The LCUs, which are slave units of the BCM, have only a communication function and consist of communica-
tion LSI and input-output interface circuits. They receive data signals from the BCM, control the ON/OFF oper-
ations of electrical loads and the sleep operation, as well as send switch signals to the BCM.

CONTROLLED SYSTEMS

The IVMS controls several body-electrical systems. The systems included in the IVMS are as follows:

●

Power window system (Refer to 

GW-16, "POWER WINDOW SYSTEM"

 )

●

Power door lock system (Refer to 

BL-19, "POWER DOOR LOCK SYSTEM"

 )

●

Remote keyless entry system (Refer to  

BL-52, "REMOTE KEYLESS ENTRY SYSTEM"

 )

●

Vehicle security (Theft warning) system (Refer to 

BL-150, "VEHICLE SECURITY (THEFT WARNING)

SYSTEM"

 )

●

Reverse interlock door mirror system (Refer to 

GW-79, "REVERSE INTERLOCK DOOR MIRROR SYS-

TEM"

 )

●

Interior room lamp (Refer to 

LT-81, "INTERIOR ROOM LAMP"

 )

●

Step lamp (Refer to 

LT-109, "STEP LAMP"

 )

●

Illumination (Refer to 

LT-131, "ILLUMINATION"

 )

●

Automatic drive positioner (Refer to 

SE-13, "AUTOMATIC DRIVE POSITIONER"

 )

●

Auto light (Refer to 

LT-6, "HEADLAMP (FOR USA)"

 )

●

Door warning lamp (Refer to 

DI-33, "WARNING LAMPS"

 )

●

Ignition key warning (Refer to 

DI-56, "WARNING CHIME"

 )

●

Light warning (Refer to 

DI-56, "WARNING CHIME"

 )

●

Seat belt warning (Refer to 

DI-56, "WARNING CHIME"

 )

●

Front wiper and washer system (Refer to 

WW-3, "WASHER SYSTEM"

 )

●

Rear window defogger timer (Refer to 

GW-59, "REAR WINDOW DEFOGGER"

 )

●

Trouble diagnosis system 
—with CONSULT-ll
—ON BOARD

Also, IVMS has the “sleep/wake-up control” function. IVMS puts itself (the whole IVMS system) to sleep under
certain conditions to prevent unnecessary power consumption. Then, when a certain input is detected, the
system wakes itself up. For more detailed information, refer to “Sleep/Wake-up Control”.

 

 

 

 

 

 

 

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