Nissan Murano Z51. Instruction — part 81
AV
U1255 SATELLITE RADIO TUNER
AV-103
< DTC/CIRCUIT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
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U1255 SATELLITE RADIO TUNER
Description
INFOID:0000000005528501
DTC Logic
INFOID:0000000005528502
Diagnosis Procedure
INFOID:0000000005528503
1.
CHECK SATELLITE RADIO TUNER POWER SUPPLY AND GROUND CIRCUIT
Check satellite radio tuner power supply and ground circuit. Refer to
AV-113, "SATELLITE RADIO TUNER :
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair malfunctioning parts.
2.
CHECK CONTINUITY COMMUNICATION CIRCUIT AND REQUEST SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect AV control unit connector and satellite radio tuner connector.
3.
Check continuity between AV control unit harness connector terminals and satellite radio tuner harness
connector terminals.
4.
Check continuity between AV control unit harness connector terminals and ground.
Is the inspection result normal?
YES
>> GO TO 3.
Part name
Description
SATELLITE RADIO TUNER
• Inputs the satellite radio signal from satellite radio antenna and outputs the
sound signal to the AV control unit.
• It is controlled with the AV control unit and serial communication (communica-
tion signal and request signal).
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1255
SAT CONN
[U1255]
When either one of the following items are detected:
• satellite radio tuner power supply and ground circuits
are malfunctioning.
• serial communication circuits between AV control unit
and satellite radio tuner are malfunctioning.
• serial communication or request signal between AV
control unit and satellite radio tuner is malfunctioning.
• request signal circuit between AV control unit and sat-
ellite radio tuner is malfunctioning.
• Satellite radio tuner power supply
and ground circuits.
• Serial communication circuits be-
tween AV control unit and satellite
radio tuner.
• Request signal circuit between AV
control unit and satellite radio tun-
er.
AV control unit
Satellite radio tuner
Continuity
Connector
Terminals
Connector
Terminals
M128
28
B48
8
Existed
29
9
30
10
AV control unit
Ground
Continuity
Connector
Terminals
M128
28
Not existed
29
30
AV-104
< DTC/CIRCUIT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
U1255 SATELLITE RADIO TUNER
NO
>> Repair harness or connector.
3.
CHECK AV CONTROL UNIT VOLTAGE
1.
Connect AV control unit connector.
2.
Turn ignition switch ON.
3.
Check voltage between AV control unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit.
4.
CHECK SATELLITE RADIO TUNER
1.
Turn ignition switch OFF.
2.
Disconnect AV control unit connector.
3.
Connect satellite radio tuner.
4.
Turn ignition switch ON.
5.
Check voltage between satellite radio tuner harness connector terminal ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace satellite radio tuner.
(+)
(
−
)
Voltage
(Approx.)
AV control unit
Connector
Terminals
M128
28
Ground
7.0 V
29
(+)
(
−
)
Voltage
(Approx.)
Satellite radio tuner
Connector
Terminal
B48
10
Ground
7.0 V
AV
U1300 AV COMM CIRCUIT
AV-105
< DTC/CIRCUIT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
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U1300 AV COMM CIRCUIT
Description
INFOID:0000000005528504
U1300 is indicated when malfunction occurs in communication signal of multi AV system. Indicated simulta-
neously, without fail, with the malfunction of control units connected to AV control unit with communication line.
Determine the possible malfunction cause from the table below.
SELF-DIAGNOSIS RESULTS DISPLAY ITEM
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1300
U1240
• AV COMM CIRCUIT
[U1300]
• SWITCH CONN
[U1240]
When either one of the following items are detected:
• multifunction switch power supply and ground circuits
are malfunctioning.
• AV communication circuits between AV control unit and
multifunction switch are malfunctioning.
• AV communication signal between AV control unit and
multifunction switch is malfunctioning.
• Multifunction switch power supply
and ground circuits.
• AV communication circuits be-
tween AV control unit and multi-
function switch.
U1300
U1246
• AV COMM CIRCUIT
[U1300]
• VIDEO DIST CONN
[U1246]
When either one of the following items are detected:
• video distributor power supply and ground circuits are
malfunctioning.
• AV communication signal between AV control unit and
video distributor is malfunctioning.
Video distributor power supply and
ground circuits.
U1300
U1248
• AV COMM CIRCUIT
[U1300]
• DVD DECK CONN
[U1248]
When either one of the following items are detected:
• DVD player power supply and ground circuits are mal-
functioning.
• AV communication signal between AV control unit and
DVD player is malfunctioning.
DVD player power supply and ground
circuits.
U1300
U1252
• AV COMM CIRCUIT
[U1300]
• REAR CAMERA LAN
CONN [U1252]
When either one of the following items are detected:
• camera control unit power supply and ground circuits
are malfunctioning.
• AV communication signal between AV control unit and
camera control unit is malfunctioning.
• AV communication circuits between multifunction and
camera control unit is malfunctioning. (Without DVD en-
tertainment system models)
• Camera control unit power supply
and ground circuits.
• AV communication circuits be-
tween multifunction and camera
control unit. (Without DVD enter-
tainment system models)
U1300
U1254
• AV COMM CIRCUIT
[U1300]
• IPod CONN [U1254]
When either one of the following items are detected:
• iPod adapter power supply and ground circuits are mal-
functioning.
• AV communication circuits between multifunction
switch and iPod adapter are malfunctioning.
• AV communication signal between AV control unit and
iPod adapter is malfunctioning.
• iPod adapter power supply and
ground circuits.
• AV communication circuits be-
tween multifunction switch unit and
iPod adapter.
U1300
U1256
• AV COMM CIRCUIT
[U1300]
• HAND FREE CONN
[U1256]
When either one of the following items are detected:
• TEL adapter unit power supply and ground circuits are
malfunctioning.
• AV communication circuits between camera control unit
and TEL adapter unit are malfunctioning.
• AV communication signal between AV control unit and
TEL adapter unit is malfunctioning.
• TEL adapter unit power supply and
ground circuits.
• AV communication circuits be-
tween camera control unit and TEL
adapter unit.
• AV communication circuits be-
tween multifunction switch and TEL
adapter unit. (without rear view
camera models)
U1300
U1252
U1256
*
• AV COMM CIRCUIT
[U1300]
• REAR CAMERA LAN
CONN [U1252]
• HAND FREE CONN
[U1256]
*
When either one of the following items are detected:
• AV communication circuits between multifunction
switch and camera control unit are malfunctioning.
(without DVD player models)
• AV communication circuits between DVD player and
camera control unit are malfunctioning. (with DVD play-
er models)
• AV communication circuits be-
tween multifunction switch and
camera control unit. (without DVD
player models)
• AV communication circuits be-
tween DVD player and camera
control unit. (with DVD player mod-
els)
AV-106
< DTC/CIRCUIT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
U1300 AV COMM CIRCUIT
NOTE:
*: Non-equipped item is not displayed.
U1300
U1248
U1252
U1256
• AV COMM CIRCUIT
[U1300]
• DVD DECK CONN
[U1248]
• REAR CAMERA LAN
CONN [U1252]
• HAND FREE CONN
[U1256]
Malfunction is detected in AV communication circuits be-
tween video distributor and DVD player.
AV communication circuits between
video distributor and DVD player.
U1300
U1246
U1248
U1252
U1256
• AV COMM CIRCUIT
[U1300]
• VIDEO DIST CONN
[U1246]
• DVD DECK CONN
[U1248]
• REAR CAMERA LAN
CONN [U1252]
• HAND FREE CONN
[U1256]
Malfunction is detected in AV communication circuits be-
tween multifunction switch and video distributor.
AV communication circuits between
multifunction switch and video distrib-
utor.
U1300
U1246
U1248
U1252
U1254
U1256
• AV COMM CIRCUIT
[U1300]
• VIDEO DIST CONN
[U1246]
• DVD DECK CONN
[U1248]
• REAR CAMERA LAN
CONN [U1252]
• IPod CONN [U1254]
• HAND FREE CONN
[U1256]
Malfunction is detected in AV communication circuits be-
tween multifunction switch and iPod adapter.
AV communication circuits between
multifunction switch and iPod adapt-
er.
U1300
U1240
U1254
*
U1256
*
• AV COMM CIRCUIT
[U1300]
• SWITCH CONN
[U1240]
• IPod CONN [U1254]
*
• HAND FREE CONN
[U1256]
*
When either one of the following items are detected:
• AV communication circuits between AV control unit and
the branch point multifunction switch.
• AV communication circuits are malfunctioning.
• AV communication circuits be-
tween AV control unit and the
branch point multifunction switch.
• Check and repair the short circuit in
AV communication circuits.
U1300
U1240
U1246
U1248
U1252
U1254
U1256
• AV COMM CIRCUIT
[U1300]
• SWITCH CONN
[U1240]
• VIDEO DIST CONN
[U1246]
• DVD DECK CONN
[U1248]
• REAR CAMERA LAN
CONN [U1252]
• IPod CONN [U1254]
• HAND FREE CONN
[U1256]
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
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