2011 INFINITI QX56 radio

AV-36
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
Unfinished configurationThe writing of configuration data is incom-
plete.Write configuration data with CONSULT-III.
USB Controller Communication Error USB connection malfunction is detected. Check that the connection to the USB con-
nector is normal.
DVD Mechanism Communication Error AV control unit malfunction is detected.  If DVD can be played, then there is a
possibility of the detection of a temporary
malfunction.
 Replace the AV control unit if the mal- function occurs constantly.
Refer to AV- 2 1 2 , "
Removal and Installa-
tion".
Steer. Angle Sensor Calibration 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
AV- 3 9 , "
CONSULT-III Function".
Front Display Connection Error 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.
 AV COMM CIRCUIT
 2nd Display Co nnection Error 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 Display Connection Error 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.
AM/FM antenna amplifier short to ground Radio antenna amp. ON signal circuit mal-
function is detected.Radio antenna amp. ON signal circuit be-
tween AV control unit and antenna amp.
AM/FM antenna amplifier open
Ext_Amp_ON output terminal short to
ground BOSE amp. ON signal circuit malfunction is
detected.BOSE amp. ON signal circuit between AV
control unit and BOSE amp.
Ext_Amp_ON output terminal :open
GPS Antenna Error GPS antenna connection malfunction is de-
tected.Check the connection of the GPS antenna
connector.
XM Antenna Connection Error Satellite radio antenna connection malfunc-
tion is detected.
Satellite radio antenna disconnection.
USB electric current Error Detection of overcurrent in USB connector. Check USB harness between the AV con-
trol unit and USB connector.
Error item Description Possible malfunction factor/Action to take
Revision: 2010 May2011 QX56

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".
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
Revision: 2010 May2011 QX56

AV-40
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
AV Communication
When “AV communication” of “CAN Diag Support Monitor” is selected, the f\
ollowing 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 e rror 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- 11 8 , "
DiagnosisProcedure".
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- 2 1 2 , "
Removal and Installa-
tion".
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- 2 1 2 , "
Removal and Installa-
tion".
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- 2 1 2 , "
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.
Revision: 2010 May2011 QX56

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- 2 1 2 , "
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- 2 1 2 , "
Removal and Installa-
tion".
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".
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
Revision: 2010 May2011 QX56

AV
AV CONTROL UNITAV-57
< ECU DIAGNOSIS INFORMATION >
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Fail-SafeINFOID:0000000006216226
When the ambiance temperature becomes extremely low or extremely high, AV control unit displays the mes-
sage and limits the AV control unit function.
FAIL-SAFE CONDITIONS
When the ambiance temperature is −20 °C ( −4 °F) or lower, or when it is 70 °C (158 °F) or higher
Display
The messages displayed on fail-safe conditions are as shown below:
DESCRIPTION OF CONTROLS
Ability Operation Mode
There is an ability operation mode for Fail-safes due to low or high ambiance temperature.
If HDD data can be read, fail-safe is shown, then normal displays are displayed only for functions which can be
operated.
RELEASE CONDITIONS OF FAIL-SAFE
Fail-safe is released on following conditions and normal mode is restored.
When The Temperature of HDD Is Low or High
If the ambient temperature becomes out of fa il-safe condition range, normal mode is restored.
DTC IndexINFOID:0000000006216227
SELF-DIAGNOSIS RESULTS DISPLAY ITEM
158 GroundRGB digital image signal
(+)
OutputIgnition
switch ON Not connected connector. 1.3 V
159 Ground Satellite radio antenna sig-
nal InputIgnition
switch ON Not connected satellite an-
tenna connector.
5.0 V
Te r m i n a l
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal name Input/
Output
Fail-safe mode Display (display of the fail-safe condition)
When HDD temperature is low HDD system is experienci
ng problems due to extreme low temperature.
Normal operation will resume when temperature rises.
When HDD temperature is high HDD system is experienci
ng problems due to extreme high temperature.
Normal operation will resume when temperature drops.
Function When Fail-safe Function is activated
Air conditioner Operation Only multifunction switch (preset switch) can be operated.
Display
 LED of multifunction switch (preset switch) illuminates.
 Aimed temperature, blow angle, and flow rate are displayed in simplified mode.
Audio Operation Only ON/OFF and volume control operations by multifunction switch (preset switch) are possible.
Display No display (“Fail-safe mode” is displayed)
Camera Operation Image tone cannot be controlled.
Display Cannot be superimposed. (warning display, tone control display)
Hands-free phone Operation Cannot be operated.
Navigation Operation Cannot be operated.
Self diagnosis The display in simplified mode of fail-safe condition
CONSULT-III diagnosis Cannot be operated.
Revision: 2010 May2011 QX56

AV
U1204 AV CONTROL UNITAV-123
< DTC/CIRCUIT DIAGNOSIS >
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U1204 AV CONTROL UNIT
DescriptionINFOID:0000000006216255
An intermittent error caused by strong radio interfer ence may be detected unless any symptoms (GPS recep-
tion error, etc.) occur. Replace the AV control uni t if the malfunction occurs constantly. Refer to AV-212,
"Removal and Installation".
DTC LogicINFOID:0000000006216256
Diagnosis ProcedureINFOID:0000000006216257
1.PERFORM THE SELF-DIAGNOSIS
1. Delete the self-diagnosis results. Turn ignition switch OFF.
2. Turn ignition switch ON. Perform the self-diagnosis again.
3. Check that the DTC is detected again.
Is any DTC detected?
YES >> Replace AV control unit. Refer to AV-212, "Removal and Installation".
NO >> An intermittent error caused by strong radi o interference may be detected unless any symptom
(GPS reception error, etc.) occurs.
DTC Display contents of
CONSULT-III DTC detection condition Possible malfunction factor
U1204 GPS CONN
[U1204] GPS malfunction is detected. An intermittent erro
r caused by strong
radio interference may be detected
unless any symptom (GPS reception
error, etc.) occurs.
Replace the AV control unit if the mal-
function occurs constantly.
Refer to AV- 2 1 2 , "
Removal and In-
stallation".
Revision: 2010 May2011 QX56

AV-124
< DTC/CIRCUIT DIAGNOSIS >
U1205 AV CONTROL UNIT
U1205 AV CONTROL UNIT
DescriptionINFOID:0000000006216258
An intermittent error caused by strong radio interference may be detected unless any symptoms (GPS recep-
tion error, etc.) occur. Replace the AV control uni t if the malfunction occurs constantly. Refer to AV-212,
"Removal and Installation".
DTC LogicINFOID:0000000006216259
Diagnosis ProcedureINFOID:0000000006216260
1.PERFORM THE SELF-DIAGNOSIS
1. Delete the self-diagnosis results. Turn ignition switch OFF.
2. Turn ignition switch ON. Perform the self-diagnosis again.
3. Check that the DTC is detected again.
Is any DTC detected?
YES >> Replace AV control unit. Refer to AV-212, "Removal and Installation".
NO >> An intermittent error caused by strong radi o interference may be detected unless any symptom
(GPS reception error, etc.) occurs.
DTC Display contents of
CONSULT-III DTC detection condition Possible malfunction factor
U1205 GPS ROM
[U1205] GPS malfunction is detected. An intermittent erro
r caused by strong
radio interference may be detected
unless any symptom (GPS reception
error, etc.) occurs.
Replace the AV control unit if the mal-
function occurs constantly.
Refer to AV- 2 1 2 , "
Removal and In-
stallation".
Revision: 2010 May2011 QX56

AV
U1206 AV CONTROL UNITAV-125
< DTC/CIRCUIT DIAGNOSIS >
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U1206 AV CONTROL UNIT
DescriptionINFOID:0000000006216261
An intermittent error caused by strong radio interfer ence may be detected unless any symptoms (GPS recep-
tion error, etc.) occur. Replace the AV control uni t if the malfunction occurs constantly. Refer to AV-212,
"Removal and Installation".
DTC LogicINFOID:0000000006216262
Diagnosis ProcedureINFOID:0000000006216263
1.PERFORM THE SELF-DIAGNOSIS
1. Delete the self-diagnosis results. Turn ignition switch OFF.
2. Turn ignition switch ON. Perform the self-diagnosis again.
3. Check that the DTC is detected again.
Is any DTC detected?
YES >> Replace AV control unit. Refer to AV-212, "Removal and Installation".
NO >> An intermittent error caused by strong radi o interference may be detected unless any symptom
(GPS reception error, etc.) occurs.
DTC Display contents of
CONSULT-III DTC detection condition Possible malfunction factor
U1206 GPS RAM
[U1206] GPS malfunction is detected. An intermittent erro
r caused by strong
radio interference may be detected
unless any symptom (GPS reception
error, etc.) occurs.
Replace the AV control unit if the mal-
function occurs constantly.
Refer to AV- 2 1 2 , "
Removal and In-
stallation".
Revision: 2010 May2011 QX56