2005 INFINITI QX4 wiring

AV-4
PRECAUTIONS
Revision: October 20052005 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS00BI4
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.
Wiring Diagrams and Trouble DiagnosisEKS00BI5
When you read wiring diagrams, refer to the following:

GI-15, "How to Read Wiring Diagrams".

PG-4, "POWER SUPPLY ROUTING CIRCUIT".
When you perform trouble diagnosis, refer to the following:

GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES".

GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident".

AV-8
AUDIO
Revision: October 20052005 QX56

through audio unit terminals 26, 27, 28 and 29

to terminals 1, 2, 3, and 4 of rear audio remote control unit.
SATELLITE RADIO TUNER (PRE-WIRING)
The satellite radio tuner pre-wiring allows connection of a satellite radio tuner.
Power is supplied at all times

through 20A fuse [No. 31, located in the fuse and fusible link box]

to satellite radio tuner pre-wiring terminal 32.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 4, located in the fuse block (J/B)]

to satellite radio tuner pre-wiring terminal 36.
Ground is supplied through the case of the satellite radio tuner.
Then audio signals are supplied

through satellite radio tuner pre-wiring terminals 21, 22, 23 and 24

to audio unit terminals 41, 42, 43 and 44.
SPEED SENSITIVE VOLUME SYSTEM
Volume level of this system goes up and down automatically in proportion to the vehicle speed. The control
level can be selected by the customer. Refer to Owner's Manual for operating instructions.

AV-10
AUDIO
Revision: October 20052005 QX56
Wiring Diagram — AUDIO —EKS00BIA
WKWA1235E

AV-28
AUDIO
Revision: October 20052005 QX56
Trouble DiagnosisEKS00BIG
The majority of the audio troubles are the result of outside causes (bad CD, electromagnetic interference,
etc.). Check the inspection items below to diagnose the malfunction.
MALFUNCTION WITH RADIO AND CD
Before proceeding, confirm that other AV switch functions (except audio functions) operate. If not, refer to AV-
145, "Unable to Operate All of AV Switches (Unable to Start Self-Diagnosis)" .
FOR RADIO ONLY
Symptom Possible cause
Inoperative

Audio unit power circuit check. Refer to AV-30, "Power Supply Circuit
Inspection" .

Audio communication line check. Refer to AV-126, "Audio Communication
Line Check (Between Display Control Unit and Audio Unit)" .

AV switch check. Refer to AV- 3 3 , "AV S w i tc h C h e c k" .
If above check is OK, replace audio unit.
Steering switch does not operate

Steering switch check. Refer to AV-32, "Steering Switch Check" .

AV switch check. Refer to AV- 3 3 , "AV S w i tc h C h e c k" .
If above check is OK, replace audio unit.
Audio information is not displayed on screen (with
NAVI)

Display unit check. Refer to AV-101, "Self-Diagnosis Mode (DCU)" .
All speakers do not sound

Audio unit

BOSE speaker amp. power supply and ground circuit check. Refer to AV- 3 0 ,
"Power Supply Circuit Inspection" .

BOSE speaker amp. ON signal

BOSE speaker amp.
One or several speakers do not sound

Front door speaker check. Refer to AV- 3 4 , "Sound Is Not Heard From Front
Door Speaker or Front Tweeter" .

Rear door speaker check. Refer to AV- 3 8 , "Sound Is Not Heard From Rear
Door Speaker or Rear Door Tweeter" .

Subwoofer check. Refer to AV-42, "Sound Is Not Heard From Subwoofer" .

Center speaker check. Refer to AV- 4 1 , "Sound Is Not Heard From Center
Speaker" .
Poor sound

Audio unit

BOSE speaker amp.

Speaker
Noisy

Audio unit

BOSE speaker amp.

Electrical equipment (generator, bonding wire, etc.)
Symptom Possible cause
No sound

Audio unit

Antenna feeder, wiring or connections

Antenna amplifier, power supply, wiring or connections
Noisy

Audio unit

Audio unit case ground

Antenna feeder, wiring or connections

Antenna amplifier, power supply, wiring or connections

Noise prevention parts

Each electrical equipment

Wire harness of each piece of electrical equipment
All radio stations stored in memory are deleted

Audio unit power circuit check. Refer to AV- 3 0 , "Power Supply Cir-
cuit Inspection" .

Audio unit

AUDIO
AV-29
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B
AV
Revision: October 20052005 QX56
NOTE:
1. The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external noise from trains and other sources. It is not a malfunction.

Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.

Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the
antenna at a different time from the waves which reflect off mountains or buildings.
FOR CD ONLY
Noise InspectionEKS00BIH
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
TYPE OF NOISE AND POSSIBLE CAUSE
Symptom Possible cause
CD cannot be inserted.

CD

Audio unit CD cannot be ejected.
The CD cannot be played.
The sound skips, stops suddenly, or is distorted.
Occurrence condition Possible cause
Occurs only when engine is ON.A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed.

Ignition components
A whistling noise occurs while the engine speed is
high. A booming noise occurs while the engine is
running and the lighting switch is ON.

Generator
The occurrence of the noise is linked with the operation of the fuel pump.

Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating.A cracking or snapping sound occurs with the
operation of various switches.

Relay malfunction, audio unit malfunction
The noise occurs when various motors are operat-
ing.

Motor case ground

Motor
The noise occurs constantly, not just under certain conditions.

Rear defogger coil malfunction

Open circuit in printed heater

Poor ground of antenna amplifier or
antenna feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially
when it is vibrating excessively.

Ground wire of body parts

Ground due to improper part installation

Wiring connections or a short circuit

AUDIO ANTENNA
AV-49
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AV
Revision: October 20052005 QX56
Wiring Diagram — W/ANT —EKS00BJ2
WKWA2285E

DVD ENTERTAINMENT SYSTEM
AV-55
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AV
Revision: October 20052005 QX56
Wiring Diagram — DVD —EKS00BJ8
WKWA2286E

NAVIGATION SYSTEM
AV-79
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AV
Revision: October 20052005 QX56
Wiring Diagram — NAVI —EKS00BJH
WKWA2289E