2008 INFINITI QX56 brake light

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QUICK REFERENCE INDEX
AGENERAL INFORMATIONGIGeneral Information
BENGINEEMEngine Mechanical
LUEngine Lubrication System
COEngine Cooling System
ECEngine Control System
FLFuel System
EXExhaust System
STRStarting System
ACCAccelerator Control System
CHYBRIDHBCHybrid Control System
HBBHybrid Battery System
HBRHybrid Brake System
DTRANSMISSION & DRIVE-
LINETMTransaxle & Transmission
DLNDriveline
FAXFront Axle
RAXRear Axle
ESUSPENSIONFSUFront Suspension
RSURear Suspension
SCSSuspension Control System
WTRoad Wheels & Tires
FBRAKESBRBrake System
PBParking Brake System
BRCBrake Control System
GSTEERINGSTSteering System
STCSteering Control System
HRESTRAINTSSBSeat Belt
SBCSeat Belt Control System
SRSRS Airbag
SRCSRS Airbag Control System
IVENTILATION, HEATER &
AIR CONDITIONERVTLVentilation System
HAHeater & Air Conditioning System
HACHeater & Air Conditioning Control System
JBODY INTERIORINTInterior
IPInstrument Panel
SESeat
ADPAutomatic Drive Postioner
APAdjustable Pedal
KBODY EXTERIOR,
DOORS, ROOF & VEHICLE
SECURITYDLKDoor & Lock
SECSecurity Control System
GWGlass & Window System
PWCPower Window Control System
RFRoof
EXTExterior
BRMBody Repair Manual
LDRIVER CONTROLSMIRMirrors
EXLExterior Lighting System
INLInterior Lighting System
WWWiper & Washer
DEFDefogger
HRNHorn
MELECTRICAL & POWER
CONTROLPWOPower Outlet
BCSBody Control System
LANLAN System
PCSPower Control System
CHGCharging System
PGPower Supply, Ground & Circuit Elements
NDRIVER INFORMATION &
MULTIMEDIAMWIMeter, Warning Lamp & Indicator
WCSWarning Chime System
SNSonar System
AVAudio, Visual & Navigation System
OCRUISE CONTROLCCSCruise Control System
PMAINTENANCEMAMaintenance
All rights reserved. No part
of this Service Manual may
be reproduced or stored in a
retrieval system, or transmit-
ted in any form, or by any
means, electronic, mechani-
cal, photo-copying, record-
ing or otherwise, without the
prior written permission of
Nissan North America, Inc.
Edition: May 2007
Revision: March 2010
Publication No. SM8E-1J60U2

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)AV-23
< FUNCTION DIAGNOSIS > [AUDIO SYSTEM]
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OPERATION PROCEDURE
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “SETTING” button, turn the volume control dial counterclockwise 30 clicks or more.
CONFIRMATION/
ADJUSTMENT Display diagnosis
Color spectrum bar Color tone of the screen can be checked by the display of a color bar.
Gradation bar Shading of the screen can be checked by the display of a gray scale.
Touch panel
• Touch panel calibration
• Touch panel response check
Vehicle signals The following vehicle signals are analyzed: Vehicle speed signal, park-
ing brake signal, light signal, ignition switch signal, and reverse signal.
Speaker test Connection can be checked by sending a test tone to each speaker.
Navigation Steering angle ad-
justment
Confirm/adjust the steering angle when there is a difference between
the displayed vehicle mark turning angle and actual.
Speed calibration Confirm/adjust the speed calibration when there is a difference between
the displayed vehicle mark location and actual.
XM SAT subscrip-
tion status Check the subscription status of the XM NAV Traffic subsription.
Error history Diagnosis results previously stored in the memory are displayed in this
mode.
Synchronize FES clock Turns FES (Familly Entertainment System) clock synchronization func-
tion ON/OFF.
Vehicle CAN diagnosis The transmitting/receiving of CAN communication can be monitored.
AV COMM diagnosis The transmitting/receiving of AV communication can be monitored.
Handsfree phone Handsfree volume
adjustment
Adjust handsfree volume (low, medium, high).
Voice microphone
test Test microphone operation.
Delete handsfree
memory Erase handsfree system memory.
Bluetooth Confirm/Change
passkey
Confirm and change the Bluetooth passkey
Confirm/Change
device name Confirm and change a device name stored in Bluetooth.
SAT Change channel
Any necessary channels required to recieve traffic information from the
satellite radio system can be set.
Change applica-
tion ID Any application ID’s required to recieve traffic information from the sat-
ellite radio system can be set.
Diag Not used.
Delete unit connection log Erase the error history and connection history of the unit.
Initialize settings All audio settings are reset to default levels.
Mode
Description
ALNIA0446GB
Revision: March 2010 2008 QX56

AV-28
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
Speaker Test
Select “Speaker Test” to display the speaker diagnosis screen. Press
“Start” to generate a test tone in speakers. Touch “End” to stop the
test tones.
Navigation
STEERING ANGLE ADJUSTMENT
The steering angle output value detected with the gyroscope is
adjusted.
SPEED CALIBRATION
During normal driving, distance error caused by tire wear and tire
pressure change is automatically adjusted for by the automatic dis-
tance correction function. This function, on the other hand, is for
immediate adjustment, in cases such as driving with tire chain fitted
on tires.
Diagnosis itemDis-
play Vehicle status
Remarks
Vehicle speed ON Vehicle speed > 0 km/h
Changes in indication may be delayed by approxi-
mately 1.5 seconds. This is normal.
OFF Vehicle speed = 0 km/h
− Ignition switch in ACC position
Parking brake ON Parking brake is applied.
OFF Parking brake is released.
Lights ON Light switch ON
Block the light beam from the auto light optical sensor.
OFF Light switch OFF
Ignition ON Ignition switch ON
—
OFF Ignition switch in ACC position
Reverse ON Selector lever in R position
Changes in indication may be delayed by approxi-
mately 1.5 seconds. This is normal.
OFF Selector lever in any position other
than R
− Ignition switch in ACC position
ALNIA0221GB
ALNIA0223GB
ALNIA0224GB
Revision: March 2010 2008 QX56

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)AV-35
< FUNCTION DIAGNOSIS > [AUDIO SYSTEM]
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DATA MONITOR
Display Item List
A/C AND AV SWITCH ASSEMBLY
A/C AND AV SWITCH ASSEMBLY : Component Function CheckINFOID:0000000001696040
A/C and AV switch assembly self-diagnosis function
Description
The ON/OFF operation (continuity) of each switch in the A/C and AV switch assembly can be checked.
Self-diagnosis mode
• Press the “BACK” button and the “UP” button within 10 seconds
after turning the ignition switch from OFF to ACC and hold them for
3 seconds or more. When the self-diagnosis mode starts, a beep
will sound and all LED indicators of the switch will illuminate.
• The continuity of each switch and control dial of the A/C and AV
switch assembly can be checked. If the switch is operating nor-
mally, the system will beep and the LED’s will illuminate when each
switch is operated.
Finishing self-diagnosis mode
Self-diagnosis mode is canceled when the ignition switch is turned OFF.
• AV COMM CIRCUIT [U1300]
• REAR CAMERA LAN CONN [U1252] • A malfunction is detected in camera con-
trol unit power supply and ground circuits
• Malfunction is detected on AV communi- cation signal between Camera control
unit and AV control unit Camera control unit power supply and
ground circuits. Refer to
AV- 6 7 , "REAR
VIEW CAMERA CONTROL UNIT : Diagno-
sis Procedure".
• AV COMM CIRCUIT [U1300]
• CAMERA CONT. CONN [U1250]
• REAR CAMERA LAN CONN [U1252] • Malfunction is detected on AV communi-
cation circuit between camera control
unit and AV control unit
• Malfunction is detected on AV communi-
cation signal between camera control
unit and AV control unit AV communication circuit between camera
control unit and AV control unit. Refer to
AV-
105, "Reference Value".
Error item
DescriptionPossible malfunction factor/Action to take
Display item [unit]ALL
SIGNALS SELECTION
FROM MENU Description
VHCL SPD SIG [ON/OFF] X XDisplays “ON” when vehicle speed > 0 km/h. Displays “OFF” when ve-
hicle speed = 0 km/h.
PKB SIG [ON/OFF] XX Displays [ON/OFF] condition of parking brake switch.
ILLUM SIG [ON/OFF] XX Displays [ON/OFF] condition of lighting switch.
IGN SIG [ON/OFF] XX Displays [ON/OFF] condition of ignition switch.
REV SIG [ON/OFF] XX Displays [ON/OFF] condition of back-up lamp switch.
AWIIA0171GB
Revision: March 2010 2008 QX56

AV
AV CONTROL UNITAV-105
< ECU DIAGNOSIS > [AUDIO SYSTEM]
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ECU DIAGNOSIS
AV CONTROL UNIT
Reference ValueINFOID:0000000001696141
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III data monitor item
TERMINAL LAYOUT
PHYSICAL VALUES
Display Item Dis-
play Vehicle status
Remarks
VHCL SPD SIG ON Vehicle speed >0 km/h (0 MPH)
Changes in indication may be delayed. This is
normal.
OFF Vehicle speed =0 km/h (0 MPH)
PKB SIG ON Parking brake is applied.
Changes in indication may be delayed. This is
normal.
OFF Parking brake is released.
ILLUM SIG ON
Block the light beam from the auto
light optical sensor when the light
SW is ON.
—
OFF Expose the auto light optical sensor
to light when the light SW is OFF or
ON.
IGN SIG ON Ignition switch ON
—
OFF Ignition switch in ACC position
REV SIG ON Selector lever in R position
Changes in indication may be delayed. This is
normal.
OFF Selector lever in any position other
than R
ALNIA0670GB
Te r m i n a l
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
1
(GR/L) Ground Amp. ON signal
OutputIgnition
switch ON —
Battery voltage
2
(LG) 3
(V) Pre-amp. audio signal front
LH
OutputIgnition
switch ON Audio output
SKIB3609E
Revision: March 2010
2008 QX56

BCS-14
< FUNCTION DIAGNOSIS >[BCM]
POWER CONSUMPTION CONTROL SYSTEM
Sleep condition
Wake-up operation
• BCM transmits sleep wake up signal (wake up) to each unit when any condition listed below is established,
and then goes into normal mode from low power consumption mode.
• Each unit starts transmissions with CAN communication by receiving sleep wake up signals. Each unit trans- mits wake up signals to BCM with CAN communication to convey the start of CAN communication.
Wake-up condition
CAN sleep condition BCM sleep condition
• Receiving the sleep-ready signal (ready) from all units
• Ignition switch: OFF
• Vehicle security system alarm: No operation
• Warning lamp: No operation
• Warning chime: No operation
• Stop lamp switch: OFF
• Key switch status: No change for 2 seconds
• Hazard warning lamp: No operation
•Exterior lamp: OFF
• Door lock status: No change for 2 seconds
• CONSULT-III communication status: No communication
• Door switch status: No change for 2 seconds The controls only BCM are completed.
(Interior room lamp battery saver: Time out etc.)
BCM wake-up condition
• Ignition switch: OFF → ACC or ON
• Stop lamp switch: ON (Depress brake pedal)
• Any door switch: OFF → ON
• Lighting switch: OFF → 1ST or PASS
• Hazard switch: OFF → ON
• Back door opener switch OFF → ON
• Remote keyless entry receiver: Receiving
• Intelligent Key unit: Receiving
Revision: March 2010 2008 QX56

BRC-78
< COMPONENT DIAGNOSIS >[VDC/TCS/ABS]
C1185 ICC UNIT
C1185 ICC UNIT
DescriptionINFOID:0000000001691164
When the force applied to brake pedal exceeds a certain level, the brake assist is activated and generates a
greater braking force than that of a convent
ional brake booster, even with light pedal force.
When the ICC preview function identifies the need to apply the sudden brake by sensing the vehicle ahead in
the same lane and the distance and relative speed from it, it applies the brake pre-pressure before driver
depresses the brake pedal and improves brake response by reducing its free play.
DTC LogicINFOID:0000000001691165
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES >> Proceed to diagnosis procedure. Refer to BRC-78, "Diagnosis Procedure".
NO >> Inspection End
Diagnosis ProcedureINFOID:0000000001691166
INSPECTION PROCEDURE
1.SELF-DIAGNOSIS RESULT CHECK
Perform self-diagnosis of ICC unit.
Are self-diagnosis result items displayed?
YES >> After checking and repairing the applicable item, perform ICC unit self-diagnosis again.
NO >> GO TO 2
2.CONNECTOR INSPECTION
Disconnect the ABS actuator and electric unit (contro l unit) connector and the ICC unit connector and check
the terminals for deformation, disconnection, looseness or damage.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace as necessary.
3.ICC UNIT CIRCUIT INSPECTION
DTC Display item Malfunction detected condition Possible cause
C1185 ABS ACC CU INTERNAL NG ICC cont rol unit internal malfunction.• Harness or connector
• ICC unit
• ABS actuator and electric unit
(control unit)
Self-diagnosis results
ABS ACC CU INTERNAL NG
Revision: March 2010 2008 QX56

BRC-102
< SYMPTOM DIAGNOSIS >[VDC/TCS/ABS]
VDC/TCS/ABS
SYMPTOM DIAGNOSIS
VDC/TCS/ABS
Symptom TableINFOID:0000000001686374
If ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp turn ON, perform self-diagnosis.
NOTE:
• 1: The ABS does not operate when the speed is 10 km/h (6 MPH) or less.
• 2: Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly depressed. However, this
is normal.
- When shifting gears
- When driving on slippery road
- During cornering at high speed
- When passing over bumps or grooves [at approximately 50 mm (1.97 in) or more]
- When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or higher] Symptom
Check itemReference
Excessive ABS function operation fre-
quency Brake force distribution
BRC-103, "
Diag-
nosis Procedure"Looseness of front and rear axle
Wheel sensor and rotor system
Unexpected pedal reaction Brake pedal stroke
BRC-104, "
Diag-
nosis Procedure"Make sure the braking force is sufficient when the ABS is not operating.
The braking distance is long Check stopping distance when the ABS is not operating. BRC-105, "
Diag-
nosis Procedure"
ABS function does not operate (Note 1) ABS actuator and electric
unit (control unit)BRC-106, "Diag-
nosis Procedure"
Pedal vibration or ABS operation sound
occurs (Note 2)Brake pedal
BRC-107, "Diag-
nosis Procedure"ABS actuator and electric unit (control unit)
Vehicle jerks during VDC/TCS/ABS con-
trol ABS actuator and electric unit (control unit)
BRC-108, "
Diag-
nosis Procedure"TCM
ECM
Revision: March 2010 2008 QX56