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Nissan Pathfinder (2008 year). Manual - part 40

AV-160

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

Area with yellow connection lines

Description

Possible malfunction location / Action

to take

AV control unit malfunction is detect-
ed

Replace the AV control unit. Refer to

AV-266, "Removal and Installation"

Poor connection is detected for the
display unit

• Harness or connector
• AV control unit
• Display unit

Switch malfunction is dectected

Perform A/C and AV switch assembly
diagnostics. Refer to

AV-164, "A/C

AND AV SWITCH ASSEMBLY : Com-
ponent Function Check"

Poor connection is detected for the
DVD player.

• Harness or connector
• AV control unit
• DVD player

ALNIA0520GB

ALNIA0521GB

ALNIA0522GB

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-161

< FUNCTION DIAGNOSIS >

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CONFIRMATION/ADJUSTMENT MODE

Start the diagnosis function and select “Confirmation/Adjustment”. The confirmation/adjustment mode
indicates where each item can be checked or adjusted.

Select each item on the “Confirmation/Adjustment” mode screen
to display the relevant trouble diagnosis screen. Press the
“BACK” button or touch "BACK" on the touch screen to return to
the initial Confirmation/Adjustment Mode screen.

Display Diagnosis

Vehicle Signals

Poor connection is detected for the
rear view camera control unit.

• Harness or connector
• AV control unit
• Rear view camera control unit

Poor connection is detected for the
satellite radio tuner.

• Harness or connector
• AV control unit
• Satellite radio tuner

Area with yellow connection lines

Description

Possible malfunction location / Action

to take

ALNIA0524GB

ALNIA0525GB

ALNIA0251GB

ALNIA0260GB

AV-162

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

A comparison check can be made of each actual vehicle signal and
the signals recognized by the system.

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.

Error History

The self-diagnosis results are judged depending on whether any
error occurs from when "Self-diagnosis" isselected until the self-
diagnosis results are displayed.
However, the diagnosis results are judged normal if an error has
occurred before the ignition SW is turned ON and then no error has
occurred until the self-diagnosis start. Check the "Error History" to
detect any error that may have occurred before the self-diagnosis
start because of this situation.
Count up method A
• The counter resets to 0 if an error occurs when IGN switch is

turned ON. The counter increases by 1 if the condition is normal at
a next IGN ON cycle.

ALNIA0261GB

Diagnosis item

Dis-
play

Vehicle status

Remarks

Vehicle speed

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

Parking brake is applied.

OFF

Parking brake is released.

Lights

Light switch ON

Block the light beam from the auto light optical sensor.

OFF

Light switch OFF

Ignition

Ignition switch ON

—

OFF

Ignition switch in ACC position

Reverse

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

ALNIA0262GB

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-163

< FUNCTION DIAGNOSIS >

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• The counter upper limit is 39. Any counts exceeding 39 are ignored. The counter can be reset (no error-

record display) with the "Delete log" switch or CONSULT-III.

Count up method B
• The counter increases by 1 if an error occurs when IGN switch is ON. The counter will not decrease even

ifthe condition is normal at the next IGN ON cycle.

• The counter upper limit is 50. Any counts exceeding 50 are ignored. The counter can be reset (no error-

record display) with the "Delete log" switch or CONSULT-III.

Vehicle CAN Diagnosis

• CAN communication status and error counter is displayed.
• The error counter displays “OK” if any malfunction was not

detected in the past and displays “0” if a malfunction is detected. It
increases by 1 if the condition is normal at the next ignition switch
ON cycle. The upper limit of the counter is 39.

• The error counter is erased if reset.

AV COMM Diagnosis

• AV communication status and error counter is displayed.
• The error counter displays “OK” if any malfunction was not

detected in the past and displays “0” if a malfunction is detected. It
increases by 1 if the condition is normal at the next ignition switch
ON cycle. The upper limit of the counter is 39.

• The error counter is erased if reset.

Delete Unit Connection Log

Deletes any unit connection records and error records from the AV
control unit memory. (Clear the records of the unit that has been
removed)

Inititialize Settings

Display method of occur-

rence frequency

Error history diplay item

Count up method A

CAN communication line, control unit (CAN), AV communication line, control unit (AV communica-
tion)

Count up method B

Other than above

ALNIA0264GB

ALNIA0265GB

ALNIA0266GB

AV-164

< FUNCTION DIAGNOSIS >

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

Initializes the AV control unit memory.

AV CONTROL UNIT : CONSULT-III Function

INFOID:0000000001451597

CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.

SELF-DIAG RESULTS

Display Item List

Refer to

AV-248, "DTC Index"

DATA MONITOR

Display Item List

A/C AND AV SWITCH ASSEMBLY

A/C AND AV SWITCH ASSEMBLY : Component Function Check

INFOID:0000000001451598

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

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MULTI AV diagnosis mode

Description

SELF-DIAG RESULTS

Displays AV control unit self-diagnosis results.

DATA MONITOR

Displays AV control unit input/output data in real time.

CAN DIAG SUPPORT MNTR

The result of transmit/receive diagnosis of CAN communication can be read.

AV COMM MONITOR

Allows the technician to monitor the status of the Multi AV system communication signals.

ECU PART NUMBER

The part number of AV control unit can be checked.

Display item [unit]

ALL

SIGNALS

SELECTION

FROM MENU

Description

VHCL SPD SIG [ON/OFF]

Displays “ON” when vehicle speed > 0 km/h. Displays “OFF” when ve-
hicle speed = 0 km/h.

PKB SIG [ON/OFF]

Displays [ON/OFF] condition of parking brake switch.

ILLUM SIG [ON/OFF]

Displays [ON/OFF] condition of lighting switch.

IGN SIG [ON/OFF]

Displays [ON/OFF] condition of ignition switch.

REV SIG [ON/OFF]

Displays [ON/OFF] condition of back-up lamp switch.

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-165

< FUNCTION DIAGNOSIS >

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• 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.

AWIIA0171GB

AV-166

< COMPONENT DIAGNOSIS >

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U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000001450683

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring. Each
control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to

LAN-13, "How to Use CAN Communication Signal Chart"

DTC Logic

INFOID:0000000001450684

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001450685

PERFORM SELF DIAGNOSTIC

Turn ignition switch ON and wait for 2 seconds or more.

Check “Self Diagnostic Result” of “AV Control Unit”.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to “LAN system”. Refer to

LAN-14, "Trouble Diagnosis Flow Chart"

>> Refer to GI section. Refer to

GI-51, "Intermittent Incident"

DTC

Display contents of CON-

SULT-III

Diagnostic item is detected when ...

Probable malfunction location

U1000

CAN COMM CIRCUIT

When AV control unit is not transmitting or re-
ceiving CAN communication signal for 2 sec-
onds or more.

CAN communication system

U1010 CONTROL UNIT (CAN)

AV-167

< COMPONENT DIAGNOSIS >

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U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000001450686

Initial diagnosis of AV control unit.

DTC Logic

INFOID:0000000001450687

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001450688

REPLACE AV CONTROL UNIT

When DTC U1010 is detected, replace AV control unit. Refer to

AV-266, "Removal and Installation"

>> INSPECTION END.

DTC

Display contents of CON-

SULT-III

Diagnostic item is detected when ...

Probable malfunction location

U1010

CONTROL UNIT (CAN)

CAN initial diagnosis malfunction is detected

AV control unit

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