INFINITI QX56 2004 Factory Service Manual

AV-154
NAVIGATION SYSTEM
Revision: August 20072004 QX56
CURRENT LOCATION MARK SHOWS A POSITION WHICH IS COMPLETELY WRONG
In the following cases, the current-location mark may appear on completely different position in the map
depending on the GPS satellite signal receiving conditions. In this case, perform location correction and direc-
tion correction.

When location correction has not been done
–If the receiving conditions of the GPS satellite signal is poor, or if the current-location mark becomes out of
place, it may move to a completely different location and not come back if location correction is not done.
The position will be corrected if the GPS signal can be received.

When the vehicle has traveled by ferry, or when the vehicle has been towed
–Because calculation of the current location cannot be done when travelling with the ignition OFF, for
example when traveling by ferry or when being towed, the location before travel is displayed. If the precise
location can be detected with GPS, the location will be corrected.
CURRENT-LOCATION MARK JUMPS
In the following cases, the current-location mark may appear to jump as a result of automatic correction of the
current location.

When map-matching has been done
–If the current location and the current-location mark are different when map-matching is done, the current-
location mark may seem to jump. At this time, the location may be “corrected” to the wrong road or to a
location which is not on a road.

When GPS location correction has been done
–If the current location and the current-location mark are different when the location is corrected using GPS
measurements, the current-location mark may seem to jump. At this time, the location may be “corrected”
to a location which is not on a road.
Precautions
for drivingJust after the engine is startedIf the vehicle is driven just after the engine
is started when the gyroscope (angular
speed sensor) correction is not completed,
the vehicle can lose its direction and may
have deviated from the correct location.Wait for a short while before
driving after starting the engine.
Continuous driving without stopping When driving long distances without stop-
ping, direction errors may accumulate, and
the current-location mark may deviate from
the correct road.Stop and adjust the orientation.
Abusive driving Spinning the wheels or engaging in other
kinds of abusive driving may result in the
system being unable perform correct
detection, and may cause the vehicle mark
to deviate from the correct road.If after travelling about 10 km (6
miles) the correct location has
not been restored, perform
location correction and, if nec-
essary, direction correction.
How to cor-
rect locationPosition correction accuracy
If the accuracy of location settings is poor,
accuracy may be reduced when the correct
road cannot be found, particularly in places
where there are many roads.Enter in the road displayed on
the screen with an accuracy of
approx. 1mm.
Caution: Whenever possible,
use detailed map for the cor-
rection.
Direction when location is corrected
If the accuracy of location settings during
correction is poor, accuracy may be
reduced afterwards.Perform direction correction. Cause (condition) –: While driving ooo: Display Driving condition Remarks (correction, etc.)
SEL701V
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NAVIGATION SYSTEM
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CURRENT LOCATION MARK IS IN A RIVER OR SEA
The navigation system moves the current-location mark with no distinction between land and rivers or sea. If
the location mark is somehow out of place, it may appear that the vehicle is driving in a river or the sea.
WHEN DRIVING ON SAME ROAD, SOMETIMES CURRENT-LOCATION MARK IS IN RIGHT
PLACE AND SOMETIMES IT IS WRONG PLACE
The conditions of the GPS antenna (GPS data) and gyroscope (angular speed sensor) change gradually.
Depending on the road traveled and the operation of the steering wheel, the location detection results will be
different. Therefore, even on a road on which the location has never been wrong, conditions may cause the
vehicle mark to deviate.
LOCATION CORRECTION BY MAP-MATCHING IS SLOW

The map-matching function needs to refer to the data of the surrounding area. It is necessary to drive
some distance for the function to work.

Because map-matching operates on this principle, when there are many roads running in similar direc-
tions in the surrounding area, no matching determination may be made. The location may not be cor-
rected until some special feature is found.
ALTHOUGH GPS RECEIVING DISPLAY IS GREEN, VEHICLE MARK DOES NOT RETURN TO
CORRECT LOCATION

The GPS accuracy has an error of approximately 10 m (30 ft). In some cases the current-location mark
may not be on the correct street, even when GPS location-correction is done.

The navigation system compares the results of GPS location detection with the results from map-match-
ing location detection. The one which is determined to have higher accuracy is used.

GPS location correction may not be performed when the vehicle is stopped.
NAME OF CURRENT PLACE IS NOT DISPLAYED
The current place name may not be displayed if there are no place names displayed on the map screen.
CONTENTS OF DISPLAY DIFFER FOR BIRDVIEW™ AND THE (FLAT) MAP SCREEN
Difference of the BIRDVIEW™ screen from the flat map screen are as follows.

The current place name displays names which are primarily in the direction of vehicle travel.

The amount of time before the vehicle travel or turn angle is updated on the screen is longer than for the
(flat) map display.

The conditions for display of place names, roads, and other data are different for nearby areas and for
more distant areas.

Some thinning of the character data is done to prevent the display becoming too complex. In some cases
and in some locations, the display contents may differ.

The same place name, street name, etc. may be displayed multiple times.

AV-156
NAVIGATION SYSTEM
Revision: August 20072004 QX56
Program Loading of NAVI Control UnitEKS007NB
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NAVIGATION SYSTEM
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Removal and Installation of NAVI Control UnitEKS007NC
CAUTION:
To avoid damage, eject map DVD-ROM before removing the NAVI control unit.
1. Slide front seat RH fully forward.
2. Remove NAVI control unit kick shield.
3. Disconnect connectors.
4. Remove screws and remove NAVI control unit.
5. Remove screws and brackets from NAVI control unit.
6. Installation is in the reverse order of removal.
Removal and Installation of GPS AntennaEKS007ND
1. Remove defrost grille.
2. Remove screws.
3. Remove center console. Refer to IP-15, "
Center Console" .
4. Disconnect GPS antenna connector and remove GPS antenna
and feeder assembly out the top.
5. Installation is in the reverse order of removal.
Removal and Installation of Steering Wheel SwitchEKS007NE
Refer to AV-47, "Removal and Installation of Steering Wheel Audio Control Switches" .
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AV-158
NAVIGATION SYSTEM
Revision: August 20072004 QX56
Removal and Installation of AV SwitchEKS007NF
Refer to AV- 4 5 , "Removal and Installation for AV Switch" .
Removal and Installation of Display UnitEKS007NG
1. Remove cluster lid D.
2. Remove the four display unit assembly screws.
3. Disconnect connectors and remove display unit assembly.
4. Remove screws and remove display unit from brackets.
5. Installation is in reverse order of removal.
Removal and Installation of Display Control UnitEKS007NH
1. Remove cluster lid D.
2. Remove the four display unit assembly screws.
3. Disconnect connectors and remove display unit assembly.
4. Remove screws and remove display control unit from brackets.
5. Installation is in reverse order of removal.
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BCS-1
BODY CONTROL SYSTEM
K ELECTRICAL
CONTENTS
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SECTION BCS
A
B
BCS
Revision: August 20072004 QX56 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 OPERATION ................................... 11
ITEMS OF EACH PART ...................................... 12
WORK SUPPORT ............................................... 12
CAN Communication Inspection Using CONSULT-
II (Self-Diagnosis) ................................................... 13
Configuration .......................................................... 13
DESCRIPTION .................................................... 13
READ CONFIGURATION PROCEDURE ............ 13
WRITE CONFIGURATION PROCEDURE .......... 16
Removal and Installation of BCM ........................... 19
REMOVAL ........................................................... 19
INSTALLATION ................................................... 19

BCS-2
PRECAUTIONS
Revision: August 20072004 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS007GD
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.
WAR NIN G:

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.

BCM (BODY CONTROL MODULE)
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Revision: August 20072004 QX56
BCM (BODY CONTROL MODULE)PFP:284B2
System DescriptionEKS007GE

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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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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