Nissan Maxima. Instruction — part 141
AV-384
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/ BOSE]
U1255 SATELLITE RADIO TUNER
U1255 SATELLITE RADIO TUNER
Description
INFOID:0000000009471336
DTC Logic
INFOID:0000000009471337
Diagnosis Procedure
INFOID:0000000009471338
Regarding Wiring Diagram information, refer to
AV-449, "Wiring Diagram - With BOSE Audio system Without
1.
CHECK SATELLITE RADIO TUNER POWER SUPPLY AND GROUND CIRCUIT
Check satellite radio tuner power supply and ground circuit. Refer to
AV-392, "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 M153 and satellite radio
tuner connector B111.
3. Check continuity between AV control unit harness connector
M153 (A) and satellite radio tuner harness connector B111 (B).
4. Check continuity between AV control unit harness connector M153 (A) and ground.
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
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.
A
B
Continuity
Connector
Terminals
Connector
Terminals
M153
28
B111
28
Yes
29
29
30
30
A
—
Continuity
Connector
Terminals
AWNIA2034ZZ
AV
U1255 SATELLITE RADIO TUNER
AV-385
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/ BOSE]
C
D
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F
G
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B
A
O
P
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 voltage between AV control unit harness connector M153
and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit. Refer to
AV-481, "Removal and Installation"
.
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. Refer to
AV-494, "Removal and Installation"
M153
28
Ground
No
29
30
(+)
(
−)
Voltage
(Approx.)
Connector
Terminals
M153
28
Ground
7.0V
29
ALNIA1179ZZ
(+)
(
−)
Voltage
(Approx.)
Connector
Terminal
B111
30
Ground
7.0V
ALNIA1180ZZ
AV-386
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/ BOSE]
U1300 AV COMM CIRCUIT
U1300 AV COMM CIRCUIT
Description
INFOID:0000000009471339
U1300 is indicated when a communication signal malfunction occurs. U1300 is indicated along with DTCs that
identify components connected to the AV control unit through communication lines. 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 are detected:
• A/C and AV switch assembly power supply and ground
circuits are malfunctioning.
• AV communication circuits between AV control unit and
A/C and AV switch assembly are malfunctioning.
• AV communication signal between AV control unit and
A/C and AV switch assembly is malfunctioning.
• A/C and AV switch assembly power
supply and ground circuits.
• AV communication circuits be-
tween AV control unit and A/C and
AV switch assembly.
AV
U1310 AV CONTROL UNIT
AV-387
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/ BOSE]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U1310 AV CONTROL UNIT
Description
INFOID:0000000009471340
Replace the AV control unit if this DTC is displayed. Refer to
AV-481, "Removal and Installation"
.
DTC Logic
INFOID:0000000009471341
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
DTC Detection Condition
Action to take
U1310
CONTROL UNIT (AV)
[U1310]
An initial diagnosis error is detected in AV communication
circuit.
Replace AV control unit. Refer to
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