Infiniti EX35. Manual — part 185
AV
U121D AV CONTROL UNIT
AV-521
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
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U121D AV CONTROL UNIT
Description
INFOID:0000000003513827
Replace the AV control unit if this DTC is displayed. Refer to
AV-903, "Removal and Installation"
.
DTC Logic
INFOID:0000000003160661
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 unified meter and A/C amp. via CAN communica-
tion to obtain 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
AV-522
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
U121E AV CONTROL UNIT
U121E AV CONTROL UNIT
Description
INFOID:0000000003513828
Replace the AV control unit if this DTC is displayed. Refer to
AV-903, "Removal and Installation"
.
DTC Logic
INFOID:0000000003160663
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 unified meter and A/C amp. via CAN communica-
tion to obtain 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
AV
U121F AV CONTROL UNIT
AV-523
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
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U121F AV CONTROL UNIT
Description
INFOID:0000000003513829
Replace the AV control unit if this DTC is displayed. Refer to
AV-903, "Removal and Installation"
.
DTC Logic
INFOID:0000000003160665
Diagnosis Procedure
INFOID:0000000003160666
1.
CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check AV control unit power supply and ground circuit. Refer to
AV-544, "AV CONTROL UNIT : Diagnosis
.
Is inspection result normal?
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 unified meter and A/C amp. via CAN communica-
tion to obtain 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-524
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
U1204 GPS
U1204 GPS
Description
INFOID:0000000003160667
An intermittent error caused by strong radio interference may be detected unless any symptoms (GPS recep-
tion error, etc.) occur. Replace the AV control unit if the malfunction occurs constantly. Refer to
.
DTC Logic
INFOID:0000000003160668
Diagnosis Procedure
INFOID:0000000003160669
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.
NO
>> The intermittent malfunction caused by strong radio interference can be detected.
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 unified meter and A/C amp. via CAN communica-
tion to obtain 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
U1204
GPS CONN
[U1204]
Internal malfunction of AV control unit (GPS malfunction)
is detected.
Replace AV control unit
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