Nissan Pathfinder (2009 year). Manual - part 27

AV-28

< ECU DIAGNOSIS >

[BASE AUDIO]

AUDIO UNIT

ABNIA0346GB

2009 Pathfinder

AV

AUDIO SYSTEM

AV-29

< SYMPTOM DIAGNOSIS >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

SYMPTOM DIAGNOSIS

AUDIO SYSTEM

AUDIO UNIT

AUDIO UNIT : Symptom Table

INFOID:0000000003938935

Symptom

Possible cause

Reference page

Inoperative

• Audio unit power circuit
• Audio unit

•

AV-14

•

AV-34

All speakers do not sound

• Audio unit power circuit
• Audio unit

•

AV-14

•

AV-34

One or several speakers do not sound

• Front door speaker
• Front tweeter
• Rear door speaker 

•

AV-15

•

AV-17

•

AV-19

2009 Pathfinder

AV-30

< SYMPTOM DIAGNOSIS >

[BASE AUDIO]

NORMAL OPERATING CONDITION

NORMAL OPERATING CONDITION

Description

INFOID:0000000003938936

The majority of the audio concerns are the result of outside causes (bad CD, electromagnetic interference,
etc.).

NOISE

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.

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

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

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 op-
eration 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 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

2009 Pathfinder

AV

PRECAUTIONS

AV-31

< PRECAUTION >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000004857477

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 SR 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 performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR 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 har-
ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing
serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000004414789

NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-

TEM).

• Remove and install all control units after disconnecting both battery cables with the ignition knob in the

″

LOCK

″

 position.

• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.

If DTC is detected, perform trouble diagnosis according to self-diagnostic results.

For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.

OPERATION PROCEDURE

1.

Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.

2.

Use the Intelligent Key or mechanical key to turn the ignition switch to the 

″

ACC

″

 position. At this time, the

steering lock will be released.

3.

Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.

4.

Perform the necessary repair operation.

2009 Pathfinder

AV-32

< PRECAUTION >

[BASE AUDIO]

PRECAUTIONS

5.

When the repair work is completed, return the ignition switch to the 

″

LOCK

″

 position before connecting

the battery cables. (At this time, the steering lock mechanism will engage.)

6.

Perform a self-diagnosis check of all control units using CONSULT-III. 

2009 Pathfinder

AV

PREPARATION

AV-33

< PREPARATION >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

PREPARATION

PREPARATION

Commercial Service Tools

INFOID:0000000003938938

Tool name

Description

Power tool

Loosening bolts and nuts

PBIC0191E

2009 Pathfinder

AV-34

< ON-VEHICLE REPAIR >

[BASE AUDIO]

AUDIO UNIT

ON-VEHICLE REPAIR

AUDIO UNIT

Removal and Installation

INFOID:0000000003938939

Removal and Installation 

REMOVAL

1.

Remove the cluster lid C. Refer to 

IP-11, "Removal and Installation"

.

2.

Remove the audio control unit screws, using power tool.

3.

Remove the audio control unit and disconnect audio control unit connectors.

4.

Remove the audio control unit brackets screws and remove the audio control unit brackets.

1.

Audio control unit 

2.

Audio control unit brackets (LH) and 
(RH)

3.

Cluster lid C

ALNIA0341ZZ

2009 Pathfinder

AV

AUDIO UNIT

AV-35

< ON-VEHICLE REPAIR >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

INSTALLATION

Installation is in the reverse order of removal.

2009 Pathfinder