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 ................ 9
SIONER” .................................................................. 2 Schematic ............................................................... 10 G
BCM (BODY CONTROL MODULE) ........................... 3 LHD MODELS ..................................................... 10
System Description .................................................. 3 RHD MODELS .................................................... 12
BCM FUNCTION ................................................... 3 CONSULT-II Function (BCM) ................................. 14
H
COMBINATIONSWITCHREADING FUNCTION..... 3 CONSULT–II INSPECTION PROCEDURE ......... 14
CAN COMMUNICATION CONTROL .................... 6 ITEMS OF EACH PART ...................................... 15
BCM STATUS CONTROL ..................................... 6 WORK SUPPORT ............................................... 16
SYSTEMS CONTROLLED BY BCM DIRECTLY..... 8 CAN Communication Inspection Using CONSULT- I
SYSTEMS CONTROLLED BY BCM AND IPDM II (Self-Diagnosis) ................................................... 16
E/R ........................................................................ 8 Configuration .......................................................... 17
SYSTEMS CONTROLLED BY BCM AND COM- Removal and Installation of BCM ........................... 17 J
BINATION METER ................................................ 8 REMOVAL ........................................................... 17
SYSTEM CONTROLLED BY BCM AND INTEL- INSTALLATION ................................................... 17
LIGENT KEY UNIT ................................................ 8
BCS
BCS-1
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER” BKS000A3
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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
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.
BCS-2
BCM (BODY CONTROL MODULE)
BCM (BODY CONTROL MODULE) PFP:284B2
A
System Description BKS000A4
● BCM (Body Control Module) controls the operation of various electrical units installed on the vehicle.
BCM FUNCTION B
BCM has a combination switch reading function for reading the operation of combination switches (light, wiper
washer, turn signal) in addition to the function for controlling the operation of various electrical components.
Also, it functions as an interface that receives signals from the front air control, and sends signals to ECM C
using CAN communication.
COMBINATION SWITCH READING FUNCTION
D
Description
● BCM reads combination switch (light, wiper) status, and controls various electrical components 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) of the switches are turned ON, circuit of output terminals (OUTPUT 1-5) and input termi-
nals (INPUT 1-5) becomes active. G
● At this time, transistors of output terminals (OUTPUT 1-5) are activated to allow current to flow. When volt-
age of input terminals (INPUT 1-5) corresponding to that switch changes, interface in BCM detects volt-
age change and BCM determines that switch is ON. H
BCS
PKIC1724E
BCS-3
BCM (BODY CONTROL MODULE)
BCM - Operation Table of Combination Switch
● BCM reads operation status of combination switch by the combination shown in the following table.
PKIC0420E
NOTE:
Headlamp has a dual system switch.
Example Operation: (When Lighting Switch 1st Position 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 lighting
switch 1st position is ON. Then BCM sends tail lamp ON signal to IPDM E/R using CAN communication.
BCS-4
BCM (BODY CONTROL MODULE)
● 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. A
I
PKIC1725E
NOTE:
Each OUTPUT terminal transistor is activated at 10 ms intervals. Therefore, after a switch is turned ON, elec- J
trical loads are activated with a time delay. But this time delay is so short that it cannot be noticed.
Operation Mode
● Combination switch reading function has operation modes as follows: BCS
Normal status
● When BCM is not in sleep status, OUTPUT terminals (1-5) each turn ON-OFF every 10 ms.
L
Sleep status
BCS-5
BCM (BODY CONTROL MODULE)
● When BCM is in sleep mode, BCM enters low power mode. OUTPUTS 1-5 turn ON-OFF at 22 ms inter-
vals, and receives lighting switch input only.
PKIC0489E
CAN COMMUNICATION CONTROL
CAN communication allows a high rate of information through the two communication lines (CAN-L, CAN-H)
connecting the various control units in the system. Each control unit transmits/receives data, but selectively
reads required data only.
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, CAN communication switches to inac-
tive 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 switches to
inactive status.
4. Sleep status
● BCM is activated with low current consumption mode.
● CAN communication is not active.
BCS-6
BCM (BODY CONTROL MODULE)
● 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: A
– Key switch
– Hazard switch
B
– Door lock/unlock switch
– Front door switch (LH, RH)
– Rear door switch (LH, RH) C
– Back door switch
– Combination switch (passing, lighting switch 1st position, front fog lamp)
– Keyfob (lock/unlock signal) D
– Door lock assembly LH (key cylinder switch)
● When control performed only by BCM is required by switch, it shifts to CAN communication inactive
mode. E
● Status of combination switch reading function is changed.
BCS
BCS-7
BCM (BODY CONTROL MODULE)
SYSTEMS CONTROLLED BY BCM DIRECTLY
System Reference
● BL-24, "POWER DOOR LOCK SYSTEM"
Power door lock
● BL-66, "POWER DOOR LOCK — SUPER LOCK —"
Remote keyless entry BL-119, "MULTI-REMOTE CONTROL SYSTEM"
Power window NOTE GW-15, "POWER WINDOW SYSTEM"
Sunroof system NOTE RF-10, "SUNROOF"
Room lamp timer LT-209, "INTERIOR ROOM LAMP"
Rear fog lamp LT-146, "REAR FOG LAMP"
Rear wiper, washer WW-40, "REAR WIPER AND WASHER SYSTEM"
NOTE:
Power supply only. No system control.
SYSTEMS CONTROLLED BY BCM AND IPDM E/R
System Reference
NATS BL-290, "NATS(Nissan Anti-Theft System)"
Auto light system LT-79, "AUTO LIGHT SYSTEM"
Parking, license plate and tail lamps LT-184, "PARKING, LICENSE PLATE AND TAIL LAMPS"
Front fog lamp LT-130, "FRONT FOG LAMP"
Front wiper, washer WW-4, "FRONT WIPER AND WASHER SYSTEM"
Rear window defogger GW-47, "REAR WINDOW DEFOGGER"
SYSTEMS CONTROLLED BY BCM AND COMBINATION METER
System Reference
Warning chime DI-53, "WARNING CHIME"
Turn signal and hazard warning lamps LT-156, "TURN SIGNAL AND HAZARD WARNING LAMPS"
SYSTEM CONTROLLED BY BCM AND INTELLIGENT KEY UNIT
System Reference
Intelligent Key system BL-143, "INTELLIGENT KEY SYSTEM"
BCS-8
BCM (BODY CONTROL MODULE)
MAJOR COMPONENTS AND CONTROL SYSTEM
System Input Output
A
● All-door locking actuator
● Turn signal lamp (LH, RH)
Remote keyless entry system Keyfob B
● Combination meter (Turn signal
lamp)
● All-door locking actuator
C
● Turn signal lamp (LH, RH)
Intelligent Key system Intelligent Key unit
● Combination meter (Turn signal
lamp)
D
Power door lock system Door lock/unlock switch All-door locking actuator
Power supply (IGN) to power win-
Ignition power supply Power window and sunroof system
dow and sunroof E
Power supply (BAT) to power
Battery power supply Power window and sunroof system
window and sunroof
Headlamp Combination switch IPDM E/R F
● Light and rain sensor
Auto light system IPDM E/R
● Combination switch
Tail lamp Combination switch IPDM E/R G
Front fog lamp Combination switch IPDM E/R
● Rear fog lamp
Rear fog lamp Combination switch H
● Combination meter
● Turn signal lamp
Turn signal lamp Combination switch
● Combination meter I
● Turn signal lamp
Hazard lamp Hazard switch
● Combination meter
● Key switch J
● Keyfob
Room lamp timer ● Door lock/unlock switch Interior room lamp
BCS
● Front door switch driver side
● All-door switch
● Combination switch L
Light warning chime ● Key switch Combination meter (warning buzzer)
● Front door switch driver side
● Combination switch M
Rain-sensing intermittent wiper IPDM E/R
● Light and rain sensor
Vehicle-speed-sensing intermit- ● Combination switch
IPDM E/R
tent wiper ● Combination meter
Front washer Combination switch IPDM E/R
● Rear window defogger switch
Rear window defogger IPDM E/R
● Ignition switch (ACC, ON)
A/C switch signal Front air control ECM
Blower fan switch signal Front air control ECM
CAN Communication System Description BKS000A5
Refer to LAN-26, "CAN COMMUNICATION" .
BCS-9
BCM (BODY CONTROL MODULE)
Schematic BKS000A6
LHD MODELS
MKWA4003E
BCS-10
BCM (BODY CONTROL MODULE)
BCS
MKWA3842E
BCS-11
BCM (BODY CONTROL MODULE)
RHD MODELS
MKWA4004E
BCS-12
BCM (BODY CONTROL MODULE)
BCS
MKWA3843E
BCS-13
BCM (BODY CONTROL MODULE)
CONSULT-II Function (BCM) BKS000A7
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
BCM diagnostic test
Diagnostic mode Content
item
WORK SUPPORT Changes setting of each function.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
Inspection by part SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The results of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
CONSULT–II INSPECTION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CON-
SULT-II CONVERTER to the data link connector, and then turn
ignition switch ON.
BBIA0538E
2. Touch “START (NISSAN BASED VHCL)”.
BCIA0029E
3. Touch “BCM” on “SELECT SYSTEM” screen.
BCIA0030E
BCS-14
BCM (BODY CONTROL MODULE)
4. Select item to be diagnosed on “SELECT TEST ITEM” screen.
A
PKIC0325E
D
ITEMS OF EACH PART
NOTE:
CONSULT-II will only display systems the vehicle possesses.
E
Diagnostic test mode (Inspection by part)
CONSULT-II SELF− CAN DIAG ECU CON-
System and item WORK DATA ACTIVE
display DIAG SUPPORT PART FIGU-
SUPPORT MONITOR TEST F
RESULTS MNTR NUMBER RATION
BCM BCM × × × × ×
Power door lock sys- G
DOOR LOCK × × ×
tem
REAR DEFOG-
Rear defogger × ×
GER
H
Warning chime BUZZER × ×
Room lamp timer INT LAMP × × ×
Headlamp HEAD LAMP × × × I
Wiper WIPER × ×
Turn signal lamp
FLASHER × × J
Hazard lamp
Blower fan switch sig-
nal AIR CONDI-
×
Air conditioner switch TONER BCS
signal
INTELLIGENT
Intelligent key system ×
KEY L
Combination switch COMB SW ×
NATS IMMU × ×
Interior lamp battery BATTERY M
× × ×
saver SAVER
Theft alarm THEFT ALARM × × ×
Oil pressure switch SIGNAL BUFFER × ×
BCS-15
BCM (BODY CONTROL MODULE)
WORK SUPPORT
Operation Procedure
1. Touch “BCM” on “SELECT TEST ITEM” screen.
PKIC0325E
2. Touch “WORK SUPPORT” on “SELECT DIAG MODE” screen.
3. Touch item on “SELECT WORK ITEM” screen.
4. Touch “START”.
5. Touch “CHANGE SET”.
6. The setting will be changed and “RESETTING COMPLETED”
will be displayed.
7. Touch “END”.
BCIA0031E
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-II (Self-Diagnosis) BKS000A8
1. SELF-DIAGNOSTIC RESULT CHECK
NOTE:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be detected in
self-diagnosis depending on control unit which carry out CAN communication.
1. Connect to CONSULT–II, and select “BCM” on “SELECT SYSTEM” screen.
2. Select “BCM” on “SELECT TEST ITEM” screen, and select “SELF-DIAG RESULTS”.
3. Check display content in self-diagnostic results.
CONSULT-II display code Diagnosis item
INITIAL DIAG
TRANSMIT DIAG
ECM
U1000
IPDM E/R
METER/M&A
I-KEY
Contents displayed
No malfunction>> Inspection End
Malfunction in CAN communication system>> After printing the monitor items, go to “CAN System”. Refer to
LAN-26, "CAN COMMUNICATION" .
BCS-16
BCM (BODY CONTROL MODULE)
Configuration BKS000A9
A
Refer to GI-37, "Configuration (BCM)" in GI section.
Removal and Installation of BCM BKS000AA
REMOVAL B
CAUTION:
If possible, before removing BCM, retrieve current BCM configuration to use for reference when con-
figuring brand-new BCM after installation. Refer to GI-37, "Configuration (BCM)" . C
1. Disconnect the battery cable from the negative terminal.
2. Remove lower knee protector. Refer to IP-10, "Removal and Installation" .
3. Remove nuts (A) and release BCM (1). D
4. Disconnect connectors and then remove BCM (1).
PKIC1222E G
INSTALLATION
Installation is the reverse order of removal.
H
NOTE:
● When replacing BCM, it must be configured. Refer to GI-37, "Configuration (BCM)" .
● When replacing BCM, perform initialization of NATS system and registration of all NATS ignition key IDs.
I
Refer to BL-290, "NATS(Nissan Anti-Theft System)" .
BCS
BCS-17
BCM (BODY CONTROL MODULE)
BCS-18
