Infiniti FX35, FX50 (S51). Manual — part 126
AV
U1243 FRONT DISPLAY UNIT
AV-277
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION (SINGLE MONITOR)]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
Is inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit.
4.
CHECK COMMUNICATION SIGNAL
Check signal between front display unit harness connector and ground.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Replace front display unit.
(+)
(
−
)
Condition
Reference value
Front display unit
Connector
Terminal
M195
9
Ground
When adjusting display bright-
ness.
PKIB5039J
(+)
(
−
)
Condition
Reference value
Front display unit
Connector
Terminal
M195
10
Ground
When adjusting display bright-
ness.
PKIB5039J
AV-278
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION (SINGLE MONITOR)]
U1244 GPS ANTENNA
U1244 GPS ANTENNA
DTC Logic
INFOID:0000000005475748
Diagnosis Procedure
INFOID:0000000005475749
1.
GPS ANTENNA CHECK
Visually check GPS antenna and antenna feeder.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair malfunctioning parts.
2.
CHECK AV CONTROL UNIT VOLTAGE
1.
Disconnect GPS antenna connector.
2.
Turn ignition switch ON.
3.
Check voltage between AV control unit terminal and ground.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Replace AV control unit.
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1244
GPS ANTENNA CONN
[U1244]
GPS antenna connection malfunction is detected.
GPS antenna disconnection
(+)
(
−
)
Voltage
(Approx.)
AV control unit
Terminal
153
Ground
5.0 V
AV
U1258 SATELLITE RADIO ANTENNA
AV-279
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION (SINGLE MONITOR)]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U1258 SATELLITE RADIO ANTENNA
DTC Logic
INFOID:0000000005475754
Diagnosis Procedure
INFOID:0000000005475755
1.
SATELLITE RADIO ANTENNA CHECK
Visually check satellite radio antenna and antenna feeder.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair malfunctioning parts.
2.
CHECK AV CONTROL UNIT VOLTAGE
1.
Disconnect satellite radio antenna connector.
2.
Turn ignition switch ON.
3.
Check voltage between AV control unit terminal and ground.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Replace AV control unit.
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1258
XM ANTENNA CONN
[U1258]
Satellite radio antenna connection malfunction is detect-
ed.
Satellite radio antenna disconnection
(+)
(
−
)
Voltage
(Approx.)
AV control unit
Terminal
159
Ground
4.0 V
AV-280
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION (SINGLE MONITOR)]
U1263 USB
U1263 USB
DTC Logic
INFOID:0000000005475757
Diagnosis Procedure
INFOID:0000000005475758
1.
CHECK USB HARNESS
Visually check USB harness.
Is the inspection result normal?
YES
>> Replace AV control unit. Refer to
NO
>> Replace USB harness.
DTC
Display contents of
CONSULT-III
DTC detection condition
Possible malfunction factor
U1263
USB OVERCURRENT
[U1263]
Detection of overcurrent in USB connector.
Check USB harness between the AV
control unit and USB connector.
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