Infiniti Q45. Manual — part 638
LAN-1
LAN SYSTEM
K ELECTRICAL
CONTENTS
C
D
E
F
G
H
I
J
L
M
SECTION
LAN
A
B
LAN
LAN SYSTEM
LAN
PRECAUTIONS . . . . . . . . . . . . . . .. 3
IVMS (LAN) . . . . . . . . . . . . . . . . . 4
Overall Description . . . . . . . . . . . . ... 4
Control System for BCM . . . . . . . . . . .. 4
Component Parts and Harness Connector Location
Sleep/Wake-Up Control . . . . . . . . . . . 5
SLEEP CONTROL . . . . . . . . . . . . 5
WAKE-UP CONTROL . . . . . . . . . . ... 6
Fail-Safe System . . . . . . . . . . . . . .. 6
CONSULT-II Function (IVMS) . . . . . . . . .. 6
DIAGNOSTIC ITEMS DESCRIPTION . . . . .. 6
DIAGNOSTIC ITEMS APPLICATION . . . . ... 6
On Board Diagnosis . . . . . . . . . . . . . 7
Removal and Installation of BCM . . . . . . . . 8
REMOVAL . . . . . . . . . . . . . . . . 8
INSTALLATION . . . . . . . . . . . . . . 8
Removal and Installation of LCU . . . . . . . .. 8
Schematic . . . . . . . . . . . . . . . . 9
POWER SUPPLY, GROUND AND COMMUNI-
CATION CIRCUITS . . . . . . . . . . . ... 9
Wiring Diagram — COMM — . . . . . . . . . 10
POWER SUPPLY, GROUND AND COMMUNI-
CATION CIRCUITS . . . . . . . . . . . . 10
Schematic — BCM — . . . . . . . . . . . 15
CAN
PRECAUTIONS . . . . . . . . . . . . . . 17
CHECK POINTS FOR USING CONSULT-II . . 17
Precautions for Trouble Diagnosis . . . . . . . 17
CAN SYSTEM . . . . . . . . . . . . . . 17
Precautions for Harness Repair . . . . . . . . 18
CAN SYSTEM . . . . . . . . . . . . . . 18
TROUBLE DIAGNOSES WORK FLOW . . . . ... 19
When Displaying CAN Communication System
Errors . . . . . . . . . . . . . . . . . .. 19
Diagnosis Procedure . . . . . . . . . . . .. 21
LAN-2
MNTR” SCREEN FOR LDW CAMERA UNIT . .. 34
CAN COMMUNICATION . . . . . . . . . . ... 35
CAN SYSTEM (TYPE 1) . . . . . . . . . . ... 46
CHECK SHEET RESULTS (EXAMPLE) . . . . 49
CAN SYSTEM (TYPE 2) . . . . . . . . . . ... 59
CHECK SHEET RESULTS (EXAMPLE) . . . . 62
CAN SYSTEM (TYPE 3) . . . . . . . . . . ... 78
CHECK SHEET RESULTS (EXAMPLE) . . . . 81
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”
NKS001G4
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
NKS001G5
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.
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
LAN-5, "Sleep/Wake-Up Control"
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.
Control System for BCM
NKS002MG
SYSTEM CONTROLLED BY MULTIPLE COMMUNICATION BETWEEN BCM AND LCU (IVMS)
●
Power window system (Refer to
.)
●
Power door lock system (Refer to
BL-19, "POWER DOOR LOCK SYSTEM"
●
Reverse interlock door mirror system (Refer to
GW-81, "REVERSE INTERLOCK DOOR MIRROR SYS-
●
Automatic drive positioner (Refer to
SE-13, "AUTOMATIC DRIVE POSITIONER"
SYSTEM CONTROLLED BY BCM ONLY
●
Remote keyless entry system (Refer to
BL-53, "REMOTE KEYLESS ENTRY SYSTEM"
.)
●
Vehicle security (Theft warning) system (Refer to
BL-155, "VEHICLE SECURITY (THEFT WARNING)
.)
●
Interior room lamp (Refer to
.)
●
Step lamp (Refer to
.)
●
Illumination (Refer to
●
Auto light (Refer to
●
Door warning lamp (Refer to
●
Ignition key warning chime (Refer to
●
Light warning chime (Refer to
●
Seat belt warning chime (Refer to
.)
●
Front wiper and washer system (Refer to
WW-4, "FRONT WIPER AND WASHER SYSTEM (WITH RAIN
●
Trunk lid opener (Refer to
BL-122, "TRUNK LID AND FUEL FILLER LID OPENER"
●
Sun roof (Refer to
.)
●
Rear window defogger (Refer to
●
Trouble diagnosis system
–
With CONSULT-ll
–
On board
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