2007 NISSAN 350Z Body Control System Workshop Manual

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BODY CONTROL SYSTEM
K ELECTRICAL
CONTENTS
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SECTION BCS
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BODY CONTROL SYSTEM
PRECAUTIONS .......................................................... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 2
Precautions for Battery Service ................................ 2
BCM (BODY CONTROL MODULE) ........................... 3
System Description .................................................. 3
BCM FUNCTION ................................................... 3
COMBINATION SWITCH READING FUNCTION ..... 3
CAN COMMUNICATION CONTROL .................... 6
BCM STATUS CONTROL ..................................... 7
SYSTEMS CONTROLLED BY BCM DIRECTLY ..... 8
SYSTEMS CONTROLLED BY BCM AND IPDM
E/R ........................................................................ 8
SYSTEMS CONTROLLED BY BCM AND COM-
BINATION METER ................................................ 8MAJOR COMPONENTS AND CONTROL SYS-
TEM ....................................................................... 9
CAN Communication System Description .............. 10
CAN Communication Unit ....................................... 10
Schematic ............................................................... 11
COUPE MODELS ............................................... 11
ROADSTER MODELS ........................................ 13
CONSULT-III Function (BCM) ................................ 15
ITEMS OF EACH PART ...................................... 15
WORK SUPPORT ............................................... 16
CAN Communication Inspection Using CONSULT-
III (Self-Diagnosis) .................................................. 16
Removal and Installation of BCM ........................... 17
REMOVAL ........................................................... 17
INSTALLATION ................................................... 17

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PRECAUTIONS
Revision: 2006 November2007 350Z
PRECAUTIONSPFP: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 ServiceNKS0009M
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.

BCM (BODY CONTROL MODULE)
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Revision: 2006 November2007 350Z
BCM (BODY CONTROL MODULE)PFP:284B2
System DescriptionNKS0009N
BCM (Body Control Module) controls the operation of various electrical units installed in the vehicle.
BCM FUNCTION
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
signals to ECM using CAN communication.
COMBINATION SWITCH READING FUNCTION
Description

BCM reads combination switch (lighting switch, wiper switch) status, and controls various electrical com-
ponent, according to the results.

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

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
(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
voltage change, and BCM determines that switch is ON.
PKIC4861E

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BCM (BODY CONTROL MODULE)
Revision: 2006 November2007 350Z
Operation Table of BCM and Combination Switches
BCM reads operation status of combination switch using combinations shown in table below.
NOTE:
Headlamp system has a dual circuit.
PKIC4963E

BCM (BODY CONTROL MODULE)
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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
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
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.
NOTE:
Each OUTPUT terminal transistor is activated at 10 ms intervals. Therefore after switch is turned ON,
electrical loads are activated with time delay. But this time delay is so short that it cannot be detected by
human senses.
SKIB7456E

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BCM (BODY CONTROL MODULE)
Revision: 2006 November2007 350Z
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.
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" .
PKIC4919E

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BCM STATUS CONTROL
BCM changes its status depending on the operation status in order to save power consumption.
1. CAN communication status

With ignition switch ON, CAN communicates with other control units normally.

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
active, CAN communication status is active.
2. Sleep transient status

This status shuts down CAN communication when ignition switch is turned OFF.

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.
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.

Three seconds after CAN communication of all control units stops, CAN communication inactive status
switches to sleep status.
4. Sleep status

BCM is activated with low power mode.

CAN communication is not active.

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)
–Hazard switch
–Door lock/unlock switch
–Front door switch (driver side, passenger side)
–Back door opener switch (coupe models)
–Trunk lid opener switch (roadster models)
–Combination switch (passing, lighting switch 1ST position)
–Key fob (lock/unlock signal)
–Key cylinder switch

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.

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BCM (BODY CONTROL MODULE)
Revision: 2006 November2007 350Z
SYSTEMS CONTROLLED BY BCM DIRECTLY
NOTE:
1. Power supply only. No system control.
2. Coupe models
SYSTEMS CONTROLLED BY BCM AND IPDM E/R
SYSTEMS CONTROLLED BY BCM AND COMBINATION METER
System Reference
Power door lock systemBL-21, "
POWER DOOR LOCK SYSTEM"
Remote keyless entry systemBL-59, "REMOTE KEYLESS ENTRY SYSTEM"
Power window system NOTE 1GW-18, "POWER WINDOW SYSTEM"
Power seat NOTE 1SE-12, "POWER SEAT/FOR COUPE" or SE-15, "POWER SEAT/FOR ROADSTER"
Interior room lampLT-128, "INTERIOR ROOM LAMP"
Rear wiper and washer system NOTE 2WW-36, "REAR WIPER AND WASHER SYSTEM"
System Reference
Panic alarmBL-59, "
REMOTE KEYLESS ENTRY SYSTEM"
Theft warningBL-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)

Daytime light systemLT-32, "HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -"

Parking, license plate and tail lamps

Battery saver controlLT-103, "PARKING, LICENSE PLATE AND TAIL LAMPS"
Front wiper and washer systemWW-4, "FRONT WIPER AND WASHER SYSTEM"
Rear window defoggerGW-56, "REAR WINDOW DEFOGGER"
System Reference
Warning chimeDI-71, "
WARNING CHIME"
Turn signal and hazard warning lampsLT-65, "TURN SIGNAL AND HAZARD WARNING LAMPS"
Low tire pressure warning system WT-10, "TIRE PRESSURE MONITORING SYSTEM"