2008 INFINITI QX56 audio

AV-34
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
CONTROL UNIT (CAN) [U1010]CAN initial diagnosis malfunction is detect-
ed
Replace the AV control unit. Refer to AV-
164, "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 3 , "
AV CONTROL
UNIT : Diagnosis Procedure".
GPS COMM [U1204]
GPS malfunction is detectedAn intermittent error ca
used by strong radio
interference may be detected unless any
symptoms (GPS recept ion error, etc.) oc-
cur.
Replace the AV control unit if the malfunc-
tion occurs constantly. Refer to AV- 1 6 4 ,
"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 4 , "
DISPLAY UNIT :
Diagnosis Procedure".
• Communication circuit between display unit and AV control unit. Refer to AV- 1 4 1 ,
"Reference Value".
GPS ANTENNA CONN [U1244] GPS antenna connection malfunction is de-
tectedGPS antenna. Refer to
AV- 1 0 5 , "
Reference
Va l u e".
XM ANTENNA CONN [U1258] Poor connection is detected in satellite ra-
dio antennaSatellite radio antenna. Refer to
AV-105,
"Reference Value".
CAMERA CONT. CONN [U1250] A malfunction is detected in Camera-con-
nection recognition signal circuitCamera-connection recognition signal cir-
cuit. Refer to
AV- 1 4 7 , "
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- 6 5 , "
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 5 , "
Reference Value".
Error item
DescriptionPossible malfunction factor/Action to take
Revision: March 2010 2008 QX56

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)AV-35
< FUNCTION DIAGNOSIS > [AUDIO SYSTEM]
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DATA MONITOR
Display Item List
A/C AND AV SWITCH ASSEMBLY
A/C AND AV SWITCH ASSEMBLY : Component Function CheckINFOID:0000000001696040
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 circuits
• 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- 6 7 , "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-
105, "Reference Value".
Error item
DescriptionPossible 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: March 2010 2008 QX56

AV-36
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000001696041
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 s
peed 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 CA N 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:0000000001696042
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000001696043
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: March 2010
2008 QX56

AV
U1010 CONTROL UNIT (CAN)AV-37
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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U1010 CONTROL UNIT (CAN)
DescriptionINFOID:0000000001696044
Initial diagnosis of AV control unit.
DTC LogicINFOID:0000000001696045
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000001696046
1.REPLACE AV CONTROL UNIT
When DTC U1010 is detected, replace AV control unit. Refer to AV-164, "
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.
Revision: March 2010 2008 QX56

AV-38
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1200 AV CONTROL UNIT
U1200 AV CONTROL UNIT
DescriptionINFOID:0000000001696047
Replace the AV control unit if this DTC is displayed. Refer to
AV-164, "Removal and Installation".
DTC LogicINFOID:0000000001696048
Part name Description
AV CONTROL UNIT • It is the master unit of the MULTI AV system and it is connected to each control
unit by means of communication. It operates each system according to com-
munication signals from the AV control unit.
• AV control unit includes audio function and vehicle information function.
• It is connected to ECM and combination meter via CAN communication to ob- tain necessary information for the vehicle information function.
• It inputs the automatic brightness ON/OFF signals that are required for the dis- play dimming control.
• It inputs the signals for driving status recognition (vehicle speed, reverse and parking brake).
DTC Display contents of CONSULT-III DTC Detection Condit ion Action to take
U1200 Control Unit
FLASH- ROM
[U1200] An internal malfunction is detected in AV control unit
(FLASH-ROM). Replace AV control unit. Re-
fer to
AV- 1 6 4 , "
Removal and
Installation".
Revision: March 2010 2008 QX56

AV
U1201 AV CONTROL UNITAV-39
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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U1201 AV CONTROL UNIT
DescriptionINFOID:0000000001696049
Refer to AV- 9 , "System Description".
DTC LogicINFOID:0000000001696050
DTC DETECTION LOGIC
DTC CONSULT-III display Detection conditionAction to take
U1201 GYRO NO CONN
[U1201] An internal malfunction is detected in AV control unit (gy-
rocompass disconnection). Replace AV control unit. Refer
to
AV-164, "
Removal and Instal-
lation".
Revision: March 2010 2008 QX56

AV-40
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1204 GPS COMM
U1204 GPS COMM
DescriptionINFOID:0000000001696051
Refer to
AV- 9 , "System Description".
DTC LogicINFOID:0000000001696052
DTC DETECTION LOGIC
DTC CONSULT-III display Detection conditionAction to take
U1204 GPS COMM
[U1204] An internal malfunction is detected in AV control unit (GPS
malfunction). Replace AV control unit. Refer
to
AV- 1 6 4 , "
Removal and Instal-
lation".
Revision: March 2010 2008 QX56

AV
U1205 GPS ROMAV-41
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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U1205 GPS ROM
DescriptionINFOID:0000000001696053
Refer to AV-13, "System Description".
DTC LogicINFOID:0000000001696054
DTC DETECTION LOGIC
DTC CONSULT-III display Detection conditionAction to take
U1205 GPS ROM
[U1205] An internal malfunction is detected in AV control unit (GPS
malfunction). Replace AV control unit. Refer
to
AV-164, "
Removal and Instal-
lation".
Revision: March 2010 2008 QX56