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![INFINITI QX56 2008 Factory Service Manual 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 INFINITI QX56 2008 Factory Service Manual 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](/manual-img/42/57030/w960_57030-216.png)
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
Page 218 of 4083
AV
U1010 CONTROL UNIT (CAN)AV-37
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
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
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![INFINITI QX56 2008 Factory Service Manual 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, "Remo INFINITI QX56 2008 Factory Service Manual 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, "Remo](/manual-img/42/57030/w960_57030-218.png)
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
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AV
U1201 AV CONTROL UNITAV-39
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
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
Page 221 of 4083
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
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AV
U1205 GPS ROMAV-41
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
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
Page 223 of 4083
AV-42
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1206 GPS RAM
U1206 GPS RAM
DescriptionINFOID:0000000001696055
Refer to
AV-13, "System Description".
DTC LogicINFOID:0000000001696056
DTC DETECTION LOGIC
DTC CONSULT-III display Detection conditionAction to take
U1206 GPS RAM
[U1206] 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
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AV
U1207 GPS RTCAV-43
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
U1207 GPS RTC
DescriptionINFOID:0000000001696057
Refer to AV-13, "System Description".
DTC LogicINFOID:0000000001696058
DTC DETECTION LOGIC
DTC CONSULT-III display Detection conditionAction to take
U1207 GPS RTC
[U1207] 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