Nissan Pathfinder. Manual — part 144

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-403

< SYSTEM DESCRIPTION >

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

Description

INFOID:0000000009174661

The AV control unit on board diagnosis includes the following functions:

• A/C and AV switch assembly self diagnosis that checks the ON/OFF operation (continuity) of each switch in

the A/C and AV switch assembly.

NOTE:

The hazard switch and disk eject switch are not included in this operation check.

• AV control unit on board diagnosis performs the following functions listed in the table below:

Perform CONSULT diagnosis if the AV control unit on board diagnosis does not start, the screen does not dis-

play anything, or the A/C and AV switch assembly self diagnosis does not function.

On Board Diagnosis Function

INFOID:0000000009174662

METHOD OF STARTING

A/C and AV Switch Assembly Self Diagnosis

Mode

Description

Self Diagnosis

• AV control unit diagnosis.
• Diagnoses the connections across system components.

Confirmation/

Adjustment

Display Diagnosis

The following check functions are available: color tone check by color
bar display and white display, light and shade check by gray scale dis-
play and touch panel calibration response check.

Vehicle Signals

Diagnosis of signals can be performed for vehicle speed, parking brake,
lights, ignition, reverse, side view switch and room lamp.

Speaker Test

The connection of a speaker can be confirmed by test tone.

Navigation

Steering Angle Ad-
justment

When there is a difference between the actual turning angle and the ve-
hicle mark turning angle, it can be adjusted.

Speed Calibration

When there is a difference between the current location mark and the ac-
tual location, it can be adjusted.

Error History

The system malfunction and the frequency when occurring in the past
are displayed. When the malfunctioning item is selected, the time and
place that the selected malfunction last occurred are displayed.

Synchronize FES Clock

–

Vehicle CAN Diagnosis

The transmitting/receiving of CAN communication can be monitored.

AV COMM Diagnosis

The communication condition of each unit of Multi AV system can be
monitored.

Hands-free Phone

The received volume adjustment of hands-free phone, microphone
speaker check, and erase memory can be performed.

Camera cont.

Camera guidlines can be adjusted and the factory configuration can be
displayed.

Delete Unit Connection Log

Erase the connection history of unit and error history.

Initialize Settings

Initializes the AV control unit memory.

Version Information

Version information of the AV control unit is displayed.

AV-404

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

• Press the BACK and UP switches within 10 seconds after turning

the ignition switch from OFF to ACC and hold them for 3 seconds

or more.

• The buzzer sounds, all indicators of the switches illuminate, and

the self-diagnosis mode begins.

• The ON position continuity of each switch can be checked by

pressing the switch. The buzzer sounds if continuity is present.

• The self diagnosis mode is canceled when the ignition switch is

turned OFF.

AV Control Unit Self Diagnosis

1. Turn the ignition ON.

2. Turn the audio system OFF.

3. While pressing the SETTING button, turn the volume control dial

clockwise or counterclockwise for 40 clicks or more. When self-

diagnosis mode begins, a short beep will be heard. Shifting from

current screen to previous screen is performed by pressing

BACK button.

4. The trouble diagnosis initial screen is displayed, and Self Diag-

nosis or Confirmation/Adjustment can be selected.

SELF DIAGNOSIS MODE

AV Control Unit Self Diagnosis

1. Select Self Diagnosis.

2. Self diagnosis screen is displayed. The bar graph visible in center of screen indicates progress of self

diagnosis.

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AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-405

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3. Diagnosis results are displayed after the self-diagnosis is com-

pleted. The unit names and the connection lines are color-coded

according to the diagnostic results.

1: Control Unit (AV control unit) is displayed in red.
• Replace AV control unit if Self Diagnosis did not run because control unit malfunction is indicated. The symptom is AV control

unit internal error. Refer to

AV-611, "Removal and Installation"

.

• If multiple errors occur at the same time for a single unit, the screen switch colors are determined according to the following order

of priority: red > gray.

4. Comments of self diagnosis results can be viewed in the diagno-

sis result screen.

AV Control Unit Self Diagnosis Results

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Diagnosis results

Unit

Connection line

Normal

Green

Green

Connection malfunction

Gray

Yellow

Unit malfunction

1

Red

Green

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Only Unit Part Is Displayed In Red

Screen switch

Description

Possible cause

Control Unit

Malfunction is detected in AV control unit
power supply and ground circuits.

• AV control unit power supply or ground

circuit.
Refer to

AV-549, "AV CONTROL UNIT :

Diagnosis Procedure"

.

• If no malfunction is detected in AV control

unit power supply and ground circuits, re-
place AV control unit.
Refer to

AV-611, "Removal and Installa-

tion"

.

AV-406

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV Control Unit Confirmation/Adjustment

1. Select Confirmation/Adjustment.

2. Select each switch on the Confirmation/Adjustment screen to

display the relevant trouble diagnosis screen. Press the BACK

switch to return to the initial Confirmation/Adjustment screen.

A Connecting Cable Between Units Is Displayed In Yellow

Area with yellow connection lines

Description

Possible cause

Control unit

⇔ Front Display

Malfunction is detected in serial communi-
cation circuits between AV control unit and
front display.

Serial communication circuits between AV
control unit and front display.

Control unit

⇔ Switch

When one of the following is detected:
• malfunction is detected in A/C and AV

switch assembly power supply and
ground circuits.

• malfunction is detected in AV communi-

cation circuits between AV control unit
and A/C and AV switch assembly.

• A/C and AV switch assembly power sup-

ply or ground circuit.
Refer to

AV-552, "A/C AND AV SWITCH

ASSEMBLY : Diagnosis Procedure"

.

• AV communication circuits between AV

control unit and A/C and AV switch as-
sembly.

Control unit

⇔ GPS Antenna

GPS antenna connection malfunctions de-
tected.

Check the connection of the GPS antenna
connector.

Control unit

⇔ Video Dist.(Rear)

Video Dist.(Rear)

⇔ Rear display 2

When one of the following is detected:
• malfunction is detected in video distribu-

tor power supply and ground circuits.

• malfunction is detected in headrest dis-

play unit LH power supply and ground
circuits.

• malfunction is detected in AV communi-

cation circuits between AV control unit
and headrest display unit (driver seat).

• Video distributor power supply or ground

circuit.
Refer to

AV-553, "VIDEO DISTRIBUTOR

: Diagnosis Procedure"

.

• Headrest display unit LH power supply or

ground circuit.
Refer to

AV-554, "HEADREST DISPLAY

UNIT : Diagnosis Procedure"

.

• AV communication circuits between AV

control unit and headrest display unit
(driver seat).

Video Dist.(Rear)

⇔ Rear display 2

When one of the following is detected:
• malfunction is detected in headrest dis-

play unit RH power supply and ground
circuits.

• malfunction is detected in AV communi-

cation circuits between headrest display
unit (driver seat) and headrest display
unit (passenger seat).

• Headrest display unit RH power supply

or ground circuit.
Refer to

AV-554, "HEADREST DISPLAY

UNIT : Diagnosis Procedure"

.

• AV communication circuits between

headrest display unit (driver seat) and
headrest display unit (passenger seat).

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