Infiniti QX56 (JA60). Manual — part 62
AV-56
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
U121D AV CONTROL UNIT
U121D AV CONTROL UNIT
Description
INFOID:0000000005146277
Replace the AV control unit if this DTC is displayed. Refer to
AV-169, "Removal and Installation"
.
DTC Logic
INFOID:0000000005146278
Part name
Description
AV CONTROL UNIT
• Integrates HDD (hard disk drive) allowing map data and music data to be
stored.
• 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.
• The AV control unit includes the audio, hands-free phone, voice control, navi-
gation, and vehicle information functions.
• 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 Condition
Action to take
U121D
DSP CONN
[U121D]
Internal malfunction of AV control unit (DSP connection
error) is detected.
Replace AV control unit. Refer to
169, "Removal and Installation"
.
AV
U121E AV CONTROL UNIT
AV-57
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
C
D
E
F
G
H
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J
K
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M
B
A
O
P
U121E AV CONTROL UNIT
Description
INFOID:0000000005146279
Replace the AV control unit if this DTC is displayed. Refer to
AV-169, "Removal and Installation"
.
DTC Logic
INFOID:0000000005146280
Part name
Description
AV CONTROL UNIT
• Integrates HDD (hard disk drive) allowing map data and music data to be
stored.
• 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.
• The AV control unit includes the audio, hands-free phone, voice control, navi-
gation, and vehicle information functions.
• 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 Condition
Action to take
U121E
DSP COMM
[U121E]
Internal malfunction of AV control unit (DSP communica-
tion error) is detected.
Replace AV control unit. Refer to
AV-58
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
U121F AV CONTROL UNIT
U121F AV CONTROL UNIT
Description
INFOID:0000000005146281
DTC Logic
INFOID:0000000005146282
Diagnosis Procedure
INFOID:0000000005146283
1.
CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check AV control unit power supply and ground circuit. Refer to
AV-68, "AV CONTROL UNIT : Diagnosis Pro-
Is inspection result OK?
YES
>> Inspection End.
NO
>> Repair malfunctioning parts.
Part name
Description
AV CONTROL UNIT
• Integrates HDD (hard disk drive) allowing map data and music data to be
stored.
• 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.
• The AV control unit includes the audio, hands-free phone, voice control, navi-
gation, and vehicle information functions.
• 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 Condition
Action to take
U121F
INTERNAL COMM
[U121F]
Internal malfunction of AV control unit (internal communi-
cation error) is detected.
AV control unit power supply and
ground circuit.
AV
U1220 AV CONTROL UNIT
AV-59
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U1220 AV CONTROL UNIT
Description
INFOID:0000000005146284
Replace the AV control unit if this DTC is displayed. Refer to
AV-169, "Removal and Installation"
.
DTC Logic
INFOID:0000000005146285
DTC DETECTION LOGIC
Part name
Description
AV CONTROL UNIT
• Integrates HDD (hard disk drive) allowing map data and music data to be
stored.
• 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.
• The AV control unit includes the audio, hands-free phone, voice control, navi-
gation, and vehicle information functions.
• 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
CONSULT-III display
Detection condition
Action to take
U1220
XM SERIAL COMM
[U1220]
An internal malfunction is detected in AV control unit (sat-
ellite radio tuner communication malfunction).
Replace AV control unit. Refer
to
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