Nissan Pathfinder. Manual — part 78
AV
U1255 SATELLITE RADIO TUNER
AV-139
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit. Refer to
AV-187, "Removal and Installation"
.
4.
CHECK SATELLITE RADIO TUNER VOLTAGE
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M138.
3. Connect satellite radio tuner connector B2.
4. Turn ignition switch ON.
5. Check voltage between satellite radio tuner connector B2 terminal 32 and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace satellite radio tuner. Refer to
AV-199, "Removal and Installation"
AV control unit
Ground
Voltage
(Approx.)
(+)
(
−)
Connector
Terminal
M138
100
—
7.0 V
101
Satellite radio tuner
Ground
Voltage
(Approx.)
(+)
(
−)
Connector
Terminal
B2
32
—
7.0 V
AV-140
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
U1263 USB
U1263 USB
DTC Logic
INFOID:0000000009174463
Diagnosis Procedure
INFOID:0000000009174464
1.
CHECK USB INTERFACE HARNESS
Visually inspect USB interface harness.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace USB interface harness. Refer to
AV-195, "Removal and Installation"
.
2.
CHECK USB INTERFACE HARNESS CONTINUITY
Check USB interface harness continuity. Refer to
Is the inspection result normal?
YES
>> Replace AV control unit. Refer to
AV-187, "Removal and Installation"
.
NO
>> Replace USB interface harness. Refer to
AV-195, "Removal and Installation"
.
CONSULT Display
DTC Detection Condition
Possible Cause
USB OVERCURRENT
[U126]
Overcurrent in USB connector is detected.
Check USB harness between the AV control unit
and USB connector.
AV
U1264 ANTENNA AMP.
AV-141
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
C
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U1264 ANTENNA AMP.
DTC Logic
INFOID:0000000009174465
Diagnosis Procedure
INFOID:0000000009174466
Regarding Wiring Diagram information, refer to
1.
CHECK CONTINUITY BETWEEN AV CONTROL UNIT AND ANTENNA BASE
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M155 and antenna base connector M502.
3. Check continuity between AV control unit connector M155 and antenna base connector M502.
4. Check continuity between AV control unit connector M155 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace harness or connectors.
2.
CHECK AV CONTROL UNIT VOLTAGE
1. Connect AV control unit connector M155.
2. Turn ignition switch ON.
3. Check voltage between AV control unit connector M155 and ground.
Is the inspection result normal?
YES
>> Replace antenna base. Refer to
AV-204, "Removal and Installation"
.
NO
>> Replace AV control unit. Refer to
AV-187, "Removal and Installation"
.
CONSULT Display
DTC Detection Condition
Possible Cause
ANTENNA AMP TERMINAL
[U1264]
Antenna amp. ON signal circuit open or short cir-
cuited.
Antenna amp. ON signal circuit between AV con-
trol unit and antenna amp.
AV control unit
Antenna base
Continuity
Connector
Terminal
Connector
Terminal
M155
126
M502
1
Yes
AV control unit
Ground
Continuity
Connector
Terminal
M155
126
—
No
AV control unit
Ground
Voltage
(Approx.)
(+)
(–)
Connector
Terminal
M155
126
—
Battery voltage
AV-142
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
U1300 AV COMM CIRCUIT
U1300 AV COMM CIRCUIT
Description
INFOID:0000000009174467
U1300 is indicated when a malfunction occurs in the communication signal of the multi AV system. Indicated
simultaneously, without fail, the malfunction of control units connected to the AV control unit through communi-
cation circuits. Determine the possible malfunction cause from the table below.
SELF-DIAGNOSIS RESULTS DISPLAY ITEM
CONSULT Display
DTC Detection Condition
Possible Cause
• AV COMM CIRCUIT
[U1300]
• SWITCH CONN
[U1240]
When any of the following is detected:
• A/C and AV switch assembly power supply or
ground circuit malfunction.
• AV communication circuit malfunction between
AV control unit and A/C and AV switch assem-
bly.
• A/C and AV switch assembly power supply and
ground circuits.
• AV communication circuits between AV control
unit and A/C and AV switch assembly.
• AV COMM CIRCUIT
[U1300]
• HAND FREE CONN
[U1256]
When any of the following is detected:
• Bluetooth
®
control unit power supply or ground
circuit malfunction.
• AV communication circuit malfunction between
AV control unit and Bluetooth
®
control unit.
• Bluetooth
®
control unit power supply and ground
circuits.
• AV communication circuits between AV control
unit and Bluetooth
®
control unit.
• AV COMM CIRCUIT
[U1300]
• SWITCH CONN
[U1240]
• HAND FREE CONN
[U1256]
AV communication circuit malfunction between AV
control unit and A/C and AV switch assembly.
AV communication circuits between AV control unit
and A/C and AV switch assembly.
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