Infiniti QX56 (Z62). Manual - part 46

AV-38

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

• Displays the communication status between AV control unit (mas-

ter unit) and each unit.

• 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” is pressed.

NOTE:
“???” indicates UNKWN

Hands-Free Phone

The hands-free phone reception volume adjustment and microphone
and speaker test functions are also available.

Camera.

Refer to 

AV-44, "On Board Diagnosis Function"

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XM

• Change Channel
- Any necessary channels required to receive traffic information from

the satellite radio system can be set.

• Change Application ID
- Any application ID'-s required to receive traffic information from the

satellite radio system can be set.

Delete Unit Connection Log

Items

Status

(Current)

Counter

(Past)

C Tx(ITM–PrimarySW)

OK / ???

OK / 0 – 39

C Rx(PrimarySW–ITM)

OK / ???

OK / 0 – 39

C Rx(AVM–ITM)

OK / ???

OK / 0 – 39

C Rx(Disp.3–Video Dist)

OK / ??? / –

OK / 0 – 39

C Rx(Video Dist–ITM)

OK / ???

OK / 0 – 39

C Rx(Sonar–ITM)

OK / ???

OK / 0 – 39

C Rx(Sonar–AVM)

OK / ???

OK / 0 – 39

C Rx(R.RemoteCont–ITM)

OK / ???

OK / 0 – 39

JSNIA2992ZZ

JSNIA2183ZZ

JSNIA2484ZZ

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-39

< SYSTEM DESCRIPTION >

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

Initialize Settings

“User Data Initialization” and “Accessory Number Initialization” are
possible.

CAUTION:

• Never perform Accessory Number Initialization except when

configuration is unsuccessful. 

• Accessory Number Initialization requires configuration. For

details, refer to 

AV-109, "Description"

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Version Information

Version information of the AV control unit is displayed.

CONSULT-III Function

INFOID:0000000006216220

APPLICATION ITEMS

CONSULT-III performs the following functions via the communication with the AV control unit.

JSNIA2189ZZ

JSNIA2190ZZ

JSNIA2191ZZ

Diagnosis mode

Description

Ecu Identification

The part number of AV control unit can be checked.

Self Diagnostic Result

Performs a diagnosis on the AV control unit and a connection diagnosis for the communication 
circuit of the Multi AV system, and displays the current and past malfunctions collectively.

AV-40

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV Communication

When “AV communication” of “CAN Diag Support Monitor” is selected, the following function will be performed.

ECU IDENTIFICATION

The part number of AV control unit is displayed.

SELF DIAGNOSIS RESULT

• In CONSULT-III self-diagnosis, self-diagnosis results and error history are displayed collectively.
• The current malfunction indicates “CRNT”. The past malfunction indicates “PAST”.
• The timing is displayed as “0” if any of the error codes [U1000], [U1010], [U1300] and [U1310] is detected.

The counter increases by 1 if the condition is normal at the next ignition switch ON cycle.

Self-diagnosis Results Display Item

Data Monitor

The diagnosis of vehicle signal that is input to the AV control unit can be performed.

Work Support

Steering angle sensor can be adjusted.

Configuration

• Read and save the vehicle specification.
• Write the vehicle specification when replacing AV control unit.

Diagnosis mode

Description

AV communication

AV&NAVI C/U

Displays the communication status from AV control unit to each unit as well as the error 
counter.

AUDIO

Displays the AV control unit communication status and the error counter.

Error item

Description

Possible malfunction factor/Action to take

CAN COMM CIRCUIT [U1000]

CAN communication malfunction is detect-
ed.

Refer to 

AV-118, "Diagnosis Procedure"

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CONTROL UNIT (CAN) [U1010]

CAN initial diagnosis malfunction is detect-
ed.

Replace the AV control unit if the malfunc-
tion occurs constantly.
Refer to 

AV-212, "Removal and Installa-

tion"

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CONTROL UNIT (AV) [U1310]

AV communication circuit initial diagnosis 
malfunction is detected.

Cont Unit [U1200]

AV control unit malfunction is detected.

GYRO NO CONN [U1201]

G-SENSOR NO CONN [U1202]

CAN CONT [U1216]

BLUETOOTH MODULE [U1217]

SUB CPU CONN [U1228]

iPod CERTIFICATION [U1229]

Built-in AUDIO CONN [U122E]

HDD CONN [U1218]

AV control unit malfunction is detected.

• If the music box function has no mal-

functions, then there is a possibility of 
the detection of a temporary malfunc-
tion.

• Replace the AV control unit if the mal-

function occurs constantly.
Refer to 

AV-212, "Removal and Installa-

tion"

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HDD READ [U1219]

HDD WRITE [U121A]

HDD COMM [U121B]

HDD ACCESS [U121C]

GPS COMM [U1204]

GPS malfunction is detected.

• An intermittent error caused by strong 

radio interference may be detected un-
less any symptom (GPS reception error, 
etc.) occurs.

• Replace the AV control unit if the mal-

function occurs constantly.
Refer to 

AV-212, "Removal and Installa-

tion"

.

GPS ROM [U1205]

GPS RAM [U1206]

GPS RTC [U1207]

USB CONTROLLER [U1225]

USB connection malfunction is detected.

Check that the connection to the USB con-
nector is normal.

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-41

< SYSTEM DESCRIPTION >

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DSP CONN [U121D]

AV control unit malfunction is detected.

• If a disc can be played, then there is a 

possibility of the detection of a tempo-
rary malfunction.

• Replace the AV control unit if the mal-

function occurs constantly.
Refer to 

AV-212, "Removal and Installa-

tion"

.

DSP COMM [U121E]

DVD COMM [U1227]

AV control unit malfunction is detected.

• If DVD can be played, then there is a 

possibility of the detection of a tempo-
rary malfunction.

• Replace the AV control unit if the mal-

function occurs constantly.
Refer to 

AV-212, "Removal and Installa-

tion"

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CONFIG UNFINISH [U122A]

The writing of configuration data is incom-
plete.

Write configuration data with CONSULT-
III.

ST ANGLE SEN CALIB [U1232]

Predictive course line center position ad-
justment of the steering angle sensor is in-
complete.

Adjust the predictive course line center po-
sition of the steering angle sensor.
Refer to 

BRC-64, "Work Procedure"

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FRONT DISP CONN [U1243]

When either one of the following items are 
detected:
• front display unit power supply and 

ground circuits are malfunctioning.

• serial communication circuits between 

AV control unit and front display unit are 
malfunctioning.

• Front display unit power supply and 

ground circuits.

• Serial communication circuits between 

AV control unit and front display unit.

GPS ANTENNA CONN [U1244]

GPS antenna connection malfunction is 
detected.

Check the connection of the GPS antenna 
connector.

• AV COMM CIRCUIT [U1300]
• VIDEO DIST CONN [U1246]

When either one of the following items are 
detected:
• video distributor power supply and 

ground circuits are malfunctioning.

• headrest display unit LH power supply 

and ground circuits are malfunctioning.

• AV communication circuits between AV 

control unit and headrest display unit LH 
are malfunctioning.

• location recognition signal circuit be-

tween headrest display unit LH and 
ground is malfunctioning.

• Video distributor power supply and 

ground circuits.

• Headrest display unit LH power supply 

and ground circuits.

• AV communication circuits between AV 

control unit and headrest display unit 
LH.

• Location recognition signal circuit be-

tween headrest display unit LH and 
ground.

3RD DISP CONN [U125A]

When either one of the following items are 
detected:
• headrest display unit RH power supply 

and ground circuits are malfunctioning.

• AV communication circuits between 

headrest display unit LH and headrest 
display unit RH are malfunctioning.

• location recognition signal circuit be-

tween headrest display unit RH and 
ground is malfunctioning.

• Headrest display unit RH power supply 

and ground circuits.

• AV communication circuits between 

Headrest display unit LH and headrest 
display unit RH.

• Location recognition signal circuit be-

tween headrest display unit RH and 
ground.

XM ANTENNA CONN [U1258]

Satellite radio antenna connection mal-
function is detected.

Satellite radio antenna disconnection.

USB OVERCURRENT [U1263]

Detection of overcurrent in USB connect-
er.

Check USB harness between the AV con-
trol unit and USB connector.

ANTENNA AMP TERMINAL
[OPEN or SHORT]
[U1264]

Radio antenna amp. ON signal circuit mal-
function is detected.

Radio antenna amp. ON signal circuit be-
tween AV control unit and antenna amp.

AMP ON TERMINAL
[GND-SHORT or VB-SHORT]
[U1265]

BOSE amp. ON signal circuit malfunction 
is detected.

BOSE amp. ON signal circuit between AV 
control unit and BOSE amp.

Error item

Description

Possible malfunction factor/Action to take