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>> Download BCS documenatation <<Text preview - extract from the documentBODY CONTROL SYSTEM
K ELECTRICAL
A
SECTION
BODY CONTROL SYSTEM
BCS B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 2 . MAJOR COMPONENTS AND CONTROL SYS- F
Precautions for Supplemental Restraint System TEM ...................................................................... 9
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- CAN Communication System Description ............. 10 .
SIONER" ................................................................. 2
. CAN Communication Unit ...................................... 10 . G
Precautions for Battery Service ............................... 2 . Schematic .............................................................. 11
.
BCM (BODY CONTROL MODULE) .......................... 3 . COUPE MODELS .............................................. 11 .
System Description ................................................. 3 . ROADSTER MODELS ....................................... 13 .
H
BCM FUNCTION .................................................. 3 . CONSULT-III Function (BCM) ............................... 15 .
COMBINATION SWITCH READING FUNCTION 3 ..... ITEMS OF EACH PART ..................................... 15 .
CAN COMMUNICATION CONTROL ................... 6 . WORK SUPPORT .............................................. 16 .
BCM STATUS CONTROL .................................... 7 . CAN Communication Inspection Using CONSULT- I
SYSTEMS CONTROLLED BY BCM DIRECTLY 8 ..... III (Self-Diagnosis) ................................................. 16
.
SYSTEMS CONTROLLED BY BCM AND IPDM Removal and Installation of BCM .......................... 17 .
E/R ....................................................................... 8
. REMOVAL .......................................................... 17. J
SYSTEMS CONTROLLED BY BCM AND COM- INSTALLATION .................................................. 17 .
BINATION METER ............................................... 8 .
BCS
L
M
Revision: 2006 November BCS-1 2007 350Z
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" NKS0009L
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:
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 Battery Service NKS0009M
Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Revision: 2006 November BCS-2 2007 350Z
BCM (BODY CONTROL MODULE)
BCM (BODY CONTROL MODULE) PFP:284B2
A
System Description NKS0009N
BCM (Body Control Module) controls the operation of various electrical units installed in the vehicle.
BCM FUNCTION B
BCM has combination switch reading function for reading the operation of combination switches (light, wiper,
washer and turn signal) in addition to a function for controlling the operation of various electrical components.
Also it has an interface function allowing it to receive signals from the unified meter and A/C amp., and send C
signals to ECM using CAN communication.
COMBINATION SWITCH READING FUNCTION
D
Description
q BCM reads combination switch (lighting switch, wiper switch) status, and controls various electrical com-
ponent, according to the results.
E
q BCM reads information of a maximum of 20 switches by combining five output terminals (OUTPUT 1 - 5)
and five input terminals (INPUT 1 - 5).
Operation Description F
q BCM activates transistors of output terminals (OUTPUT 1 - 5) periodically and, allows current to flow in
turn.
q If any (1 or more) switches are turned ON, circuit of output terminals (OUTPUT 1 - 5) and input terminals G
(INPUT 1 - 5) becomes active.
q At this time, transistors of output terminals (OUTPUT 1 - 5) are activated to allow current to flow. When
voltage of input terminals (INPUT 1 - 5) corresponding to that switch changes, interface in BCM detects H
voltage change, and BCM determines that switch is ON.
I
J
BCS
L
M
PKIC4861E
Revision: 2006 November BCS-3 2007 350Z
BCM (BODY CONTROL MODULE)
Operation Table of BCM and Combination Switches
BCM reads operation status of combination switch using combinations shown in table below.
PKIC4963E
NOTE:
Headlamp system has a dual circuit.
Revision: 2006 November BCS-4 2007 350Z
BCM (BODY CONTROL MODULE)
Sample Operation (When lighting switch 1ST position is turned ON)
q When lighting switch 1ST position is turned ON, contact in combination switch turns ON. At this time if A
OUTPUT 4 transistor is activated, BCM detects that voltage changes in INPUT 5.
q When OUTPUT 4 transistor is ON, BCM detects that voltage changes in INPUT 5, and judges that lighting
switch 1ST position is ON. Then BCM sends lighting switch (1ST position) ON signal to IPDM E/R using B
CAN communication.
q When OUTPUT 4 transistor is activated again, BCM detects that voltage changes in INPUT 5, and recog-
nizes that lighting switch 1ST position is continuously ON. C
D
E
F
G
H
I
J
BCS
SKIB7456E
NOTE:
Each OUTPUT terminal transistor is activated at 10 ms intervals. Therefore after switch is turned ON, L
electrical loads are activated with time delay. But this time delay is so short that it cannot be detected by
human senses.
M
Revision: 2006 November BCS-5 2007 350Z
BCM (BODY CONTROL MODULE)
Operation Mode
The combination switch reading function has the operation modes shown below.
1. Normal mode
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