Nissan Quest E52. Instruction — part 121
AV
U1255 SATELLITE RADIO TUNER
AV-363
< DTC/CIRCUIT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
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U1255 SATELLITE RADIO TUNER
DTC Logic
INFOID:0000000009652166
Diagnosis Procedure
INFOID:0000000009652167
1.
CHECK SATELLITE RADIO TUNER POWER SUPPLY AND GROUND CIRCUIT
Check satellite radio tuner power supply and ground circuit. Refer to
AV-370, "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 and satellite radio tuner harness connector.
4.
Check continuity between AV control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK AV CONTROL UNIT VOLTAGE
1.
Connect AV control unit connector.
2.
Turn ignition switch ON.
3.
Check signal between AV control unit harness connector and ground.
DTC
Display contents of
CONSULT
DTC Detection Condition
Possible causes
U1255
SAT CONN
[U1255]
When either one of the following items is detected:
• satellite radio tuner power supply and ground circuit are
malfunctioning.
• communication circuits between AV control unit and
satellite radio tuner are malfunctioning.
• request signal circuit between AV control unit and sat-
ellite radio tuner are malfunctioning.
• Satellite radio tuner power supply
and ground circuit.
Refer to
DIO TUNER : Diagnosis Proce-
dure"
• Communication circuit between AV
control unit and satellite radio tun-
er.
• Request signal circuit between AV
control unit and satellite radio tun-
er.
AV control unit
Satellite radio tuner
Continuity
Connector
Terminals
Connector
Terminals
M176
122
B49
10
Existed
129
8
130
9
AV control unit
Ground
Continuity
Connector
Terminals
M176
122
Not existed
129
130
AV-364
< DTC/CIRCUIT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
U1255 SATELLITE RADIO TUNER
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit. Refer to
AV-404, "Removal and Installation"
.
4.
CHECK SATELLITE RADIO TUNER VOLTAGE
1.
Turn ignition switch OFF.
2.
Disconnect AV control unit connector.
3.
Connect satellite radio tuner.
4.
Turn ignition switch ON.
5.
Check signal between satellite radio tuner harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace satellite radio tuner. Refer to
AV-424, "Removal and Installation"
(+)
(
−
)
Voltage
(Approx.)
AV control unit
Connector
Terminals
M176
129
Ground
7.0 V
130
7.0 V
(+)
(
−
)
Voltage
(Approx.)
Satellite radio tuner
Connector
Terminal
B49
10
Ground
7.0 V
AV
U1300 AV COMM CIRCUIT
AV-365
< DTC/CIRCUIT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
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U1300 AV COMM CIRCUIT
Description
INFOID:0000000009652168
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
DTC Detection Condition
Possible causes
U1300
U1240
• AV COMM CIRCUIT
[U1300]
• SWITCH CONN
[U1240]
When either one of the following items is detected:
• multifunction switch power supply and ground circuits
are malfunctioning.
• AV communication circuits between AV control unit and
multifunction switch are 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:
• rear display unit power supply and ground circuits are
malfunctioning.
• AV communication circuits between AV control unit and
rear display unit are malfunctioning.
• Rear display unit power supply and
ground circuits.
• AV communication circuits be-
tween AV control unit and rear dis-
play unit.
U1300
U1256
• AV COMM CIRCUIT
[U1300]
• HAND FREE CONN
[U1256]
When either one of the following items is detected:
• TEL adapter unit power supply and ground circuits are
malfunctioning.
• AV communication circuits between AV control unit and
TEL adapter unit are malfunctioning.
• TEL adapter unit power supply and
ground circuits.
• AV communication circuits be-
tween AV control unit and TEL
adapter unit.
U1300
U1240
U1246
U1256
• AV COMM CIRCUIT
[U1300]
• SWITCH CONN
[U1240]
• VIDEO DIST CONN
[U1246]
• HAND FREE CONN
[U1256]
AV communication circuits between AV control unit and
multifunction switch are malfunctioning.
AV communication circuits between
AV control unit and multifunction
switch.
AV-366
< DTC/CIRCUIT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
U1310 AV CONTROL UNIT
U1310 AV CONTROL UNIT
DTC Logic
INFOID:0000000009652169
DTC
Display contents of
CONSULT
DTC detection condition
Possible malfunction factor
U1310
CONTROL UNIT (AV)
[U1310]
An initial diagnosis error is detected in AV communication
circuit.
Replace the AV control unit if the mal-
function occurs constantly.
Refer to
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