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AV-168
NAVIGATION SYSTEM
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5. Disconnect GPS antenna connector.
6. Remove GPS antenna.
Installation
Installation is in the reverse order of removal.
NAVI CONTROL UNIT
Removal
CAUTION:
To avoid damage, eject map DVD-ROM before removing the NAVI control unit.
1. Disconnect negative battery cable.
2. Remove front passenger seat. Refer to SE-91, "
Removal and Installation" .
3. Remove NAVI control unit kick shield screws (A).
4. Remove NAVI control unit kick shield (1).
5. Disconnect NAVI control unit connectors.
6. Remove NAVI control unit screws (B).
7. Remove NAVI control unit (2).
Installation
Installation is in the reverse order of removal.
STEERING WHEEL AUDIO CONTROL SWITCHES
Refer to AV- 5 9 , "STEERING WHEEL AUDIO CONTROL SWITCHES" .
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BCS-1
BODY CONTROL SYSTEM
K ELECTRICAL
CONTENTS
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SECTION
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PRECAUTIONS .....................................................
..... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 2
BCM (BODY CONTROL MODULE) ...................... ..... 3
System Description ............................................. ..... 3
BCM FUNCTION .............................................. ..... 3
COMBINATION SWITCH READING FUNCTION ..... 3
CAN COMMUNICATION CONTROL ............... ..... 6
BCM STATUS CONTROL ................................ ..... 6
SYSTEMS CONTROLLED BY BCM DIRECTLY ..... 7
SYSTEMS CONTROLLED BY BCM AND IPDM
E/R ................................................................... ..... 7
MAJOR COMPONENTS AND CONTROL SYS-
TEM .................................................................. ..... 7CAN Communication System Description ...........
..... 8
Schematic ............................................................ ..... 9
CONSULT-II Function (BCM) .............................. ... 11
CONSULT–II INSPECTION PROCEDURE ...... ... 11
ITEMS OF EACH PART ................................... ... 12
WORK SUPPORT ............................................ ... 13
CAN Communication Inspection Using CONSULT-
II (Self-Diagnosis) ................................................ ... 13
Configuration ....................................................... ... 14
DESCRIPTION ................................................. ... 14
READ CONFIGURATION PROCEDURE ......... ... 14
WRITE CONFIGURATION PROCEDURE ....... ... 16
BCM ..................................................................... ... 20
REMOVAL AND INSTALLATION ..................... ... 20
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BCS-2
PRECAUTIONS
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS00BF0
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.
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BCM (BODY CONTROL MODULE)BCS-3
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BCM (BODY CONTROL MODULE)PFP:284B2
System DescriptionEKS00D7W
BCM (Body Control Module) controls the operation of various electrical units installed on the vehicle.
BCM FUNCTION
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
using CAN communication.
COMBINATION SWITCH READING FUNCTION
1. Description
BCM reads combination switch (light, wiper) status, and controls various electrical components accord-
ing 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).
2. Operation description
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 ter-
minals (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.
3. BCM - Operation table of combination switch
BCM reads operation status of combination switch by the combination shown in the following table.
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BCS-4
BCM (BODY CONTROL MODULE)
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NOTE:
Headlamp has a dual system switch.
4. 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 communica-
tion.
When OUTPUT 4 transistor is activated again, BCM detects that voltage changes in INPUT 5 and rec-
ognizes that lighting switch 1st position is continuously ON.
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BCM (BODY CONTROL MODULE)BCS-5
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NOTE:
Each OUTPUT terminal transistor is activated at 10 ms intervals. Therefore, after a switch is turned ON,
electrical loads are activated with a time delay. But this time delay is so short that it cannot be noticed.
5. Operation mode
Combination switch reading function has operation modes as follows:
Normal status
When BCM is not in sleep status, OUTPUT terminals (1-5) each turn ON-OFF every 10 ms.
Sleep status
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BCS-6
BCM (BODY CONTROL MODULE)
Revision: November 20092006 QX56
When BCM is in sleep mode, transistors of OUTPUT 1 and 5 stop the output, and BCM enters low-cur-
rent-consumption mode. OUTPUTS (2, 3, and 4) turn ON-OFF at 60 ms intervals, and receives lighting
switch input only.
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 reduce 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
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BCM (BODY CONTROL MODULE)BCS-7
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BCM is activated with low current consumption 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:
–Ignition switch
–Key switch (insert)
–Hazard switch
–Main door lock/unlock switch
–Front door switch (LH, RH)
–Rear door switch (LH, RH)
–Back latch (door ajar switch)
–Glass hatch ajar switch
–Combination switch (passing, lighting switch 1st position, front fog lamp)
–Keyfob (lock/unlock signal)
–Front door lock assembly LH (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.
SYSTEMS CONTROLLED BY BCM DIRECTLY
Power door lock system. Refer to BL-16, "POWER DOOR LOCK SYSTEM" .
Remote keyless entry system. Refer to BL-44, "REMOTE KEYLESS ENTRY SYSTEM" .
Power window system. Refer to GW-15, "POWER WINDOW SYSTEM" . NOTE
Sunroof system. Refer to RF-10, "SUNROOF" . NOTE
Room lamp timer. Refer to LT- 1 3 4 , "INTERIOR ROOM LAMP" .
Warning chime system. Refer to DI-43, "WARNING CHIME" .
Turn signal and hazard warning lamps system. Refer to LT- 8 0 , "TURN SIGNAL AND HAZARD WARNING
LAMPS" .
Trailer turn signal and hazard warning lamps system (if equipped). Refer to LT- 1 2 6 , "TRAILER TOW" .
Rear wiper and washer system. Refer to WW-32, "REAR WIPER AND WASHER SYSTEM" .
NOTE:
Power supply only. No system control.
SYSTEMS CONTROLLED BY BCM AND IPDM E/R
Panic system. Refer to BL-44, "REMOTE KEYLESS ENTRY SYSTEM" .
Vehicle security system. Refer to BL-75, "VEHICLE SECURITY (THEFT WARNING) SYSTEM" .
IVIS (NATS) system. Refer to BL-137, "IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)" .
Headlamp, tail lamp, front fog lamp, auto light and battery saver control systems. Refer to LT- 5 , "HEAD-
LAMP (FOR USA)" , LT- 3 3 , "HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -" , LT- 111 ,
"PARKING, LICENSE PLATE AND TAIL LAMPS" , LT- 6 9 , "FRONT FOG LAMP" or LT- 4 7 , "AUTO LIGHT
SYSTEM" .
Front wiper and washer system. Refer to WW-4, "FRONT WIPER AND WASHER SYSTEM" .
Rear window defogger system. Refer to GW-74, "REAR WINDOW DEFOGGER" .
MAJOR COMPONENTS AND CONTROL SYSTEM
System InputOutput
Remote keyless entry system Remote keyless entry receiver (keyfob)
All door locking actuators
Back door opener actuator
Turn signal lamps
Power door lock system
Front power door lock/unlock switch (LH, RH)
All door switches
Key switch All door locking actuators