BODY CONTROL SYSTEM

K ELECTRICAL

SECTION
BODY CONTROL SYSTEM
BCS B

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

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:
● 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.
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
● BCM reads combination switch (lighting switch, wiper switch) status, and controls various electrical com-
ponent, according to the results.
E
● 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
● BCM activates transistors of output terminals (OUTPUT 1 - 5) periodically and, allows current to flow in
turn.
● 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.
● 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.

BCS

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)

● 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.
● 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.
● 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

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
– When BCM is not in sleep mode, OUTPUT terminals (1 - 5) each turn ON-OFF every 10 ms.
2. Sleep mode
– When BCM is in sleep mode BCM enters low power mode. OUTPUT (1 - 5) turn ON-OFF every 60 ms,
and only input from light switch system is accepted.

PKIC4919E

CAN COMMUNICATION CONTROL

CAN communication allows a high rate of information transmission through the two communication lines (CAN
L line, CAN H line) connecting the various control units in the system. Each control unit transmits/receives
data but selectively reads required data only. For details of signals that are transmitted/received by BCM via
CAN communication, refer to LAN-48, "CAN System Specification Chart" .

Revision: 2006 November BCS-6 2007 350Z

 BCM (BODY CONTROL MODULE)

BCM STATUS CONTROL

BCM changes its status depending on the operation status in order to save power consumption. A
1. CAN communication status
● With ignition switch ON, CAN communicates with other control units normally.
B
● Control by BCM is being operated properly.

● When ignition switch is OFF, switching to sleep mode is possible.

● Even when ignition switch is OFF, if CAN communication with IPDM E/R and combination meter is
C
active, CAN communication status is active.
2. Sleep transient status
● This status shuts down CAN communication when ignition switch is turned OFF.
D
● It transmits sleep request signal to IPDM E/R and combination meter.

● Two seconds after CAN communication of all control units stops, sleep transient status switches to CAN
communication inactive status. E
3. CAN communication inactive status
● With ignition switch OFF, CAN communication is not active.

● With ignition switch OFF, control performed only by BCM is active. F

● Three seconds after CAN communication of all control units stops, CAN communication inactive status
switches to sleep status.
4. Sleep status G
● BCM is activated with low power mode.

● CAN communication is not active.

H
● When CAN communication operation is detected, it switches to CAN communication status.

● When a state of the following switches changes, it switches to CAN communication state.

– Key switch (ACC, ON)

I
– Hazard switch

– Door lock/unlock switch

– Front door switch (driver side, passenger side) J

– Back door opener switch (coupe models)

– Trunk lid opener switch (roadster models)

– Combination switch (passing, lighting switch 1ST position) BCS

– Key fob (lock/unlock signal)

– Key cylinder switch

L
● When control performed only by BCM is required by switch, it shifts to CAN communication inactive
mode.
● Status of combination switch reading function is changed.
M

Revision: 2006 November BCS-7 2007 350Z

 BCM (BODY CONTROL MODULE)

SYSTEMS CONTROLLED BY BCM DIRECTLY

System Reference
Power door lock system BL-21, "POWER DOOR LOCK SYSTEM"
Remote keyless entry system BL-59, "REMOTE KEYLESS ENTRY SYSTEM"
NOTE 1 GW-18, "POWER WINDOW SYSTEM"
Power window system

Power seat NOTE 1 SE-12, "POWER SEAT/FOR COUPE" or SE-15, "POWER SEAT/FOR ROADSTER"
Interior room lamp LT-128, "INTERIOR ROOM LAMP"

Rear wiper and washer system NOTE 2 WW-36, "REAR WIPER AND WASHER SYSTEM"
NOTE:
1. Power supply only. No system control.
2. Coupe models

SYSTEMS CONTROLLED BY BCM AND IPDM E/R

System Reference
Panic alarm BL-59, "REMOTE KEYLESS ENTRY SYSTEM"
Theft warning BL-125, "VEHICLE SECURITY (THEFT WARNING) SYSTEM"
NVIS (NATS) BL-150, "NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)"
Headlamp (For USA) LT-5, "HEADLAMP (FOR USA)"
● Headlamp (For Canada)
LT-32, "HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -"
● Daytime light system
● Parking, license plate and tail lamps
LT-103, "PARKING, LICENSE PLATE AND TAIL LAMPS"
● Battery saver control
Front wiper and washer system WW-4, "FRONT WIPER AND WASHER SYSTEM"
Rear window defogger GW-56, "REAR WINDOW DEFOGGER"

SYSTEMS CONTROLLED BY BCM AND COMBINATION METER

System Reference
Warning chime DI-71, "WARNING CHIME"
Turn signal and hazard warning lamps LT-65, "TURN SIGNAL AND HAZARD WARNING LAMPS"
Low tire pressure warning system WT-10, "TIRE PRESSURE MONITORING SYSTEM"

Revision: 2006 November BCS-8 2007 350Z

 BCM (BODY CONTROL MODULE)

MAJOR COMPONENTS AND CONTROL SYSTEM

System Input Output
A

● Remote keyless entry receiver

● All-door locking actuator
Remote control entry system ● Key switch
● Turn signal lamp (LH, RH) B
● All-door switch
● Power window main switch
(door lock and unlock switch)
Power door lock system All-door locking actuator C
● Power window sub switch (passenger side)
(door lock and unlock switch)
Power supply (IGN) to power window Ignition power supply Power window system D
Power supply (BAT) to power window and Power window system and power
Battery power supply
power seat seat
● Key switch E
Panic alarm IPDM E/R
● Remote keyless entry receiver
● All-door switch
● Remote keyless entry receiver ● IPDM E/R F
Theft warning system
● Power window main switch (door lock and ● Security indicator lamp
unlock switch)
● Ignition switch G
Exterior lamp battery saver control IPDM E/R
● Combination switch
Headlamp Combination switch IPDM E/R
H
● Engine status signal
● Ignition switch
Daytime light system IPDM E/R
● Combination switch
I
● Parking brake signal
Tail lamp Combination switch IPDM E/R
● Combination switch ● Turn signal lamp J
Turn signal lamp
● Ignition switch ● Combination meter
● Turn signal lamp
Hazard lamp Hazard switch BCS
● Combination meter
● Key switch
● Remote keyless entry receiver ● Interior room lamp
L
Room lamp timer ● Power window main switch (door lock and ● Map lamp
unlock switch) ● Key hole illumination
● All-door switch
M
● Ignition switch
Interior lamp battery saver control ● Remote keyless entry receiver BCM
● All-door switch
● Key switch Combination meter
Key warning chime
● Front door switch driver side (warning buzzer)

● Combination switch
Combination meter
Light warning chime ● Ignition switch
(warning buzzer)
● Front door switch driver side
● Combination meter [Seat belt buckle
(driver side) switch] Combination meter
Seat belt warning chime
(warning buzzer)
● Ignition switch
● Combination switch
Front wiper and washer system ● Combination meter IPDM E/R
● Ignition switch

Revision: 2006 November BCS-9 2007 350Z

 BCM (BODY CONTROL MODULE)

System Input Output

● Combination switch
Rear wiper and washer system NOTE Rear wiper motor
● Ignition switch
● Rear window defogger switch
Rear window defogger IPDM E/R
● Ignition switch
A/C switch signal Unified meter and A/C amp. ECM
Blower fan switch signal Unified meter and A/C amp. ECM
Low tire pressure warning system Remote keyless entry receiver Combination meter
NOTE:
Coupe models

CAN Communication System Description NKS0009O

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. Modern
vehicles are equipped with many electronic control units and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected 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 NKS0009P

Refer to LAN-48, "CAN System Specification Chart" .

Revision: 2006 November BCS-10 2007 350Z

 BCM (BODY CONTROL MODULE)

Schematic NKS0009Q

COUPE MODELS A

BCS

TKWT5775E

Revision: 2006 November BCS-11 2007 350Z

 BCM (BODY CONTROL MODULE)

TKWT4014E

Revision: 2006 November BCS-12 2007 350Z

 BCM (BODY CONTROL MODULE)

ROADSTER MODELS
A

BCS

TKWT5776E

Revision: 2006 November BCS-13 2007 350Z

 BCM (BODY CONTROL MODULE)

TKWT5777E

Revision: 2006 November BCS-14 2007 350Z

 BCM (BODY CONTROL MODULE)

CONSULT-III Function (BCM) NKS0009R

A
CONSULT-III can display each diagnostic item using the diagnostic test mode shown following.
BCM diagnostic test item Check item, diagnostic test mode Content
WORK SUPPORT Changes setting of each function. B
SELF-DIAG RESULTS BCM performs self-diagnosis of CAN communication.
DATA MONITOR Displays the input data of BCM in real time.
Inspection by part C
ACTIVE TEST Gives a drive signal to a load to check the operation.
The result of transmit/receive diagnosis of CAN com-
CAN DIAG SUPPORT MNTR
munication can be read.
D
ECU PART NUMBER BCM part number can be read.

ITEMS OF EACH PART

E
NOTE:
CONSULT-III displays systems equipped in the vehicle.
×: Applicable
Diagnostic test mode (Inspection by part)
F

CAN
ECU
System and item CONSULT-III display SELF− DATA DIAG CON-
WORK ACTIVE PART G
DIAG MONI- SUP- FIGU-
SUPPORT TEST NUM-
RESULTS TOR PORT RATION
BER
MNTR
BCM BCM × × × × × NOTE H
Power door lock system DOOR LOCK × × ×
Rear window defogger REAR DEFOGGER × ×
I
Warning chime BUZZER × ×
Room lamp timer INT LAMP × × ×
Remotecontrol entry system MULTI REMOTE ENT × × × J
Headlamp HEAD LAMP × × ×
Wiper WIPER × × ×
BCS
Turn signal lamp
FLASHER × ×
Hazard lamp
Blower fan switch signal
AIR CONDITONER × L
A/C switch signal
Combination switch COMB SW ×
NVIS IMMU × ×
M
Interior lamp battery saver BATTERY SAVER × × ×
Trunk lid TRUNK × ×
Vehicle security system THEFT ALM × × ×
Retained power control RETAINED PWR × × ×
Oil pressure switch SIGNAL BUFFER × NOTE ×
Low tire pressure warning AIR PRESSURE
× × × ×
system MONITOR
Panic alarm system PANIC ALARM ×
NOTE:
This item is displayed, but should not be used.

Revision: 2006 November BCS-15 2007 350Z

 BCM (BODY CONTROL MODULE)

WORK SUPPORT
Display Item List
Item Description
RESET SETTING VALUE Return a value set with WORK SUPPORT of each system to a default value in factory shipment.

CAN Communication Inspection Using CONSULT-III (Self-Diagnosis) NKS0009S

1. SELF-DIAGNOSIS RESULT CHECK

CONSULT-III display code Diagnosis item
INITIAL DIAG
TRANSMIT DIAG
U1000 ECM
IPDM E/R
METER / M&A
Contents displayed
No malfunction>>INSPECTION END
Malfunction in CAN communication system>>After printing the monitor items, go to “CAN System”. Refer to
LAN-48, "CAN System Specification Chart" .

Revision: 2006 November BCS-16 2007 350Z

 BCM (BODY CONTROL MODULE)

Removal and Installation of BCM NKS0009T

REMOVAL A
1. Remove the dash side finisher (LH). Refer to EI-35, "BODY
SIDE TRIM" .
2. Disconnect BCM connector. B
3. Remove bracket mounting screws to remove BCM and fuse
block with bracket.
C

SKIA1918E
H
4. Raise the pawl of fuse block and remove bracket from fuse block
to remove BCM.
I

BCS
SKIA1919E

INSTALLATION L
Installation is the reverse order of removal.
NOTE:
When replacing BCM perform initialization of NATS system and registration of all NATS ignition key IDs. M

Revision: 2006 November BCS-17 2007 350Z

 BCM (BODY CONTROL MODULE)

Revision: 2006 November BCS-18 2007 350Z