2009 INFINITI QX56 audio

AV-34
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
XM SAT SUBSCRIPTION STATUS
The XM NavTraffic subscription status can be checked.
Error History
The self-diagnosis results are judged depending on whether any
error occurs from when “Self-diagnosis” is selected 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 thecondition is normal at
a next IGN ON cycle.
• 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.
Error item
Some error items may be displayed simultaneously according to the cause. If some error items are displayed
simultaneously, the detection of the cause can be performed by the combination of display items
ALNIA0225GB
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
Error item DescriptionPossible malfunction factor/Action to take
CAN COMM CIRCUIT CAN communication malfunction is detect-
ed.Perform diagnosis with CONSULT-III, and
then repair the malfunctioning parts accord-
ing to the diagnosis results.
Refer to
AV- 3 8 , "
AV CONTROL UNIT :
CONSULT-III Function".
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Revision: December 20092009 QX56

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)AV-35
< FUNCTION DIAGNOSIS > [AUDIO SYSTEM]
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CONTROL UNIT (CAN) CAN initial diagnosis malfunction is detect-
ed.
Replace the AV control unit. Refer to AV-
168, "Removal and Installation".
CONTROL UNIT (AV)
AV communication circuit initial diagnosis
malfunction is detected.
FLASH-ROM Error Of Control Unit
AV control unit malfunction is detected.
Connection Of Gyro
XM SERIAL COMM Error
CAN Controller Memory Error
Bluetooth Module Connection Error
HDD CONN Error
HDD READ Error
HDD WRITE Error
HDD COMM Error
HDD ACCESS Error
DSP CONN Error
DSP COMM Error
Internal Communication Error
AV control unit power supply and ground
circuit. Refer to
AV- 6 8 , "
AV CONTROL
UNIT : Diagnosis Procedure".
GPS Communication Error
GPS malfunction is detected.An intermittent error ca
used by strong radio
interference may be detected unless any
symptoms (GPS reception error, etc.) oc-
cur.
Replace the AV control unit ff the malfunc-
tion occurs constantly. Refer to AV- 1 6 8 ,
"Removal and Installation".
GPS ROM Error
GPS RAM Error
GPS RTC Error
Front Display Connection Error
• Display unit power supply and ground
circuit malfunction is detected.
• Malfunction is detected on communica- tion circuit between display unit and AV
control unit.
• Malfunction is detected on communica- tion signal between display unit and AV
control unit. • Display unit power supply and ground
circuit. Refer to AV- 6 9 , "
DISPLAY UNIT :
Diagnosis Procedure".
• Communication circuit between display
unit and AV control unit.
GPS Antenna Error GPS antenna connection malfunction is de-
tected.
GPS antenna
XM Antenna Connection Error Poor connection is detected in satellite ra-
dio antenna.Satellite radio antenna
Camera Control Unit Connection Error A malfunction is detected in the rear view
camera-connection recognition signal cir-
cuit.Rear view camera-connection recognition
signal circuit.
• AV COMM CIRCUIT
• Switches Connection Error • A/C and AV switch assembly power sup-
ply and ground circuit malfunction is de-
tected.
• A malfunction is detected in AV commu- nication circuit between AV control unit
and A/C and AV switch assembly.
• A malfunction is detected in AV commu- nication signal between AV control unit
and A/C and AV switch assembly. • A/C and AV switch assembly power sup-
ply and ground circuits. Refer to AV- 7 0 ,
"A/C AND AV SWITCH ASSEMBLY : Di-
agnosis Procedure".
• AV communication circuit between AV
control unit and A/C and AV switch as-
sembly.
Error item
DescriptionPossible malfunction factor/Action to take
Revision: December 20092009 QX56

AV-36
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
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.
Handsfree Phone
The hands-free phone reception volume adjustment, microphone
and speaker test, and memory erase functions are also available.
Bluetooth
Passkey confirmation/change
• AV COMM CIRCUIT
• Rear View Camera Connection Error • A malfunction is detected in camera con-
trol unit power supply and ground cir-
cuits.
• Malfunction is detected on AV communi- cation signal between camera control
unit and AV control unit. Rear view camera control unit power sup-
ply and ground circuits. Refer to
AV- 7 2 ,
"REAR VIEW CAMERA CONTROL UNIT :
Diagnosis Procedure".
• AV COMM CIRCUIT
• Rear View Camera Connection Error
• Rear View Camera Control Unit Connec-
tion Error • Malfunction is detected in AV communi-
cation circuit between camera control
unit and AV control unit.
• Malfunction is detected on AV communi- cation signal between camera control
unit and AV control unit. AV communication circuit between Camera
control unit and AV control unit.
Error item
DescriptionPossible malfunction factor/Action to take
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Revision: December 20092009 QX56

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)AV-37
< FUNCTION DIAGNOSIS > [AUDIO SYSTEM]
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• The passkey of Bluetooth can be confirmed and changed.
• The passkey can be changed by four digits within 0 to 9.
Device name check/change
• The device name of Bluetooth can be confirmed and changed.
• The device name can be changed by sixteen digits within A to Z (small character can be used) and - (hyphen).
SAT
• 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
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AWNIA1553GB
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Revision: December 20092009 QX56

AV-38
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
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
Initializes the AV control unit memory.
AV CONTROL UNIT : CONSULT-III FunctionINFOID:0000000003776789
CONSULT-III can display each diagnostic item us
ing the diagnostic test modes shown following.
Self-diagnosis results
• 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
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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.
Error item DescriptionPossible malfunction factor/Action to take
CAN COMM CIRCUIT[U1000] CAN communication malfunction is detect-
ed.Perform diagnosis with CONSULT-III, and
then repair the malfunctioning parts accord-
ing to the diagnosis results.
Refer to
AV- 3 8 , "
AV CONTROL UNIT :
CONSULT-III Function".
Revision: December 20092009 QX56

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)AV-39
< FUNCTION DIAGNOSIS > [AUDIO SYSTEM]
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CONTROL UNIT (CAN) [U1010] CAN initial diagnosis malfunction is detect-
ed.
Replace the AV control unit. Refer to AV-
168, "Removal and Installation".
CONTROL UNIT (AV) [U1310]
AV communication circuit initial diagnosis
malfunction is detected.
Control Unit FLASH-ROM [U1200]
AV control unit malfunction is detected.
Gyro NO CONN [U1201]
CAN CONT [U1216]
BLUETOOTH CONN [U1217]
HDD CONN [U1218]
HDD READ [U1219]
XM SERIAL COMM [U1220]
HDD WRITE [U121A]
HDD COMM [U121B]
HDD ACCESS [U121C]
DSP CONN [U121D]
DSP COMM [U121E]
INTERNAL COMM [U121F]
AV control unit power supply and ground
circuit. Refer to
AV- 6 8 , "
AV CONTROL
UNIT : Diagnosis Procedure".
GPS COMM [U1204]
GPS malfunction is detected.An intermittent error ca
used by strong radio
interference may be detected unless any
symptoms (GPS reception error, etc.) oc-
cur.
Replace the AV control unit if the malfunc-
tion occurs constantly. Refer to AV- 1 6 8 ,
"Removal and Installation".
GPS ROM [U1205]
GPS RAM [U1206]
GPS RTC [U1207]
FRONT DISP CONN [U1243]
• Display unit power supply and ground
circuit malfunction is detected.
• Malfunction is detected on communica- tion circuit between display unit and AV
control unit.
• Malfunction is detected on communica- tion signal between display unit and AV
control unit. • Display unit power supply and ground
circuit. Refer to AV- 6 9 , "
DISPLAY UNIT :
Diagnosis Procedure".
• Communication circuit between display unit and AV control unit. Refer to AV- 1 4 5 ,
"Reference Value".
GPS ANTENNA CONN [U1244] GPS antenna connection malfunction is de-
tected.GPS antenna. Refer to AV- 1 0 9 , "
Reference
Va l u e".
XM ANTENNA CONN [U1258] Poor connection is detected in satellite ra-
dio antenna.Satellite radio antenna. Refer to
AV- 1 0 9 ,
"Reference Value".
CAMERA CONT. CONN [U1250] A malfunction is detected in Camera-con-
nection recognition signal circuit.Camera-connection recognition signal cir-
cuit. Refer to
AV- 1 5 1 , "
Reference Value".
• AV COMM CIRCUIT [U1300]
• SWITCHE CONN [U1240] • AC and AV switch power supply and
ground circuit malfunction is detected.
• A malfunction is detected in AV commu- nication circuit between AV control unit
and AC and AV switch.
• A malfunction is detected in AV commu- nication signal between AV control unit
and AC and AV switch. • AC and AV switch power supply and
ground circuits. Refer to AV- 7 0 , "
A/C
AND AV SWITCH ASSEMBLY : Diagno-
sis Procedure".
• AV communication circuit between AV
control unit and AC and AV switch. Refer
to AV- 1 0 9 , "
Reference Value".
Error item
DescriptionPossible malfunction factor/Action to take
Revision: December 20092009 QX56

AV-40
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
DATA MONITOR
Display Item List
A/C AND AV SWITCH ASSEMBLY
A/C AND AV SWITCH ASSEMBLY : Component Function CheckINFOID:0000000003776790
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
• 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.
• AV COMM CIRCUIT [U1300]
• REAR CAMERA LAN CONN [U1252] • A malfunction is detected in camera con-
trol unit power supply and ground cir-
cuits.
• Malfunction is detected on AV communi- cation signal between Camera control
unit and AV control unit. Camera control unit power supply and
ground circuits. Refer to
AV- 7 2 , "REAR
VIEW CAMERA CONTROL UNIT : Diagno-
sis Procedure".
• AV COMM CIRCUIT [U1300]
• CAMERA CONT. CONN [U1250]
• REAR CAMERA LAN CONN [U1252] • Malfunction is detected on AV communi-
cation circuit between camera control
unit and AV control unit.
• Malfunction is detected on AV communi- cation signal between camera control
unit and AV control unit. AV communication circuit between camera
control unit and AV control unit. Refer to
AV-
109, "Reference Value".
Error item Description Possible malfunction factor/Action to take
Display item [unit]
ALL
SIGNALS SELECTION
FROM MENU Description
VHCL SPD SIG [ON/OFF] X XDisplays “ON” when vehicle speed > 0 km/h. Displays “OFF” when ve-
hicle speed = 0 km/h.
PKB SIG [ON/OFF] XX Displays [ON/OFF] condition of parking brake switch.
ILLUM SIG [ON/OFF] XX Displays [ON/OFF] condition of lighting switch.
IGN SIG [ON/OFF] XX Displays [ON/OFF] condition of ignition switch.
REV SIG [ON/OFF] XX Displays [ON/OFF] condition of back-up lamp switch.
AWIIA0171GB
Revision: December 20092009 QX56

AV
U1000 CAN COMM CIRCUITAV-41
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003776791
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-44, "
CAN Communication Signal Chart".
DTC LogicINFOID:0000000003776792
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003776793
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. 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".
NO >> Refer to GI section. Refer to GI-38, "
Intermittent Incident".
DTCDisplay 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.
Revision: December 20092009 QX56