Nissan Maxima. Manual — part 101
AV-224
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/O BOSE]
U1243 DISPLAY UNIT
U1243 DISPLAY UNIT
Description
INFOID:0000000010064862
DTC Logic
INFOID:0000000010064863
Diagnosis Procedure
INFOID:0000000010064864
Regarding Wiring Diagram information, refer to
AV-282, "Wiring Diagram - Without BOSE Audio System With-
1.
CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit. Refer to
AV-232, "DISPLAY UNIT : Diagnosis Procedure"
.
Is inspection result OK?
YES
>> GO TO 2.
NO
>> Repair malfunctioning parts.
2.
CHECK CONTINUITY OF COMMUNICATION CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display unit connector and AV control unit connector.
3. Check continuity between display unit harness connector M141
(A) terminals 11, 22 and AV control unit harness connector M117
(B) terminals 56, 44.
4. Check continuity between display unit harness connector M141
(A) terminals 11, 22 and ground.
Are continuity results as specified?
Part name
Description
DISPLAY UNIT
• Display image is controlled by the serial communication from AV control unit.
• Inputs the RGB image signal (RGB, RGB area and RGB synchronizing) from
AV control unit and the auxiliary image signal from the auxiliary input jacks.
• Outputs the synchronizing signals (HP and VP) to the AV control unit.
DTC
Display contents of
CONSULT
DTC Detection Condition
Possible causes
U1243
FRONT DISP CONN
[U1243]
• Display unit power supply and ground circuit malfunc-
tion is detected.
• Malfunction is detected on communication circuit be-
tween display unit and AV control unit.
• Malfunction is detected on communication signal be-
tween display unit and AV control unit.
• Display unit power supply and
ground circuit.
• Communication circuit between
display unit and AV control unit.
A
B
Continuity
Connector
Terminal
Connector
Terminal
M141
11
M117
56
Yes
22
44
A
—
Continuity
Connector
Terminal
M141
11
Ground
No
22
ALNIA0310GB
AV
U1243 DISPLAY UNIT
AV-225
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/O BOSE]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK COMMUNICATION SIGNAL
1. Connect display unit connector and AV control unit connector.
2. Turn ignition switch ON.
3. Check signal between display unit harness connector M141 ter-
minal 11 and ground with an oscilloscope or CONSULT.
Are voltage readings as specified?
YES
>> GO TO 4.
NO
>> Replace AV control unit. Refer to
AV-311, "Removal and Installation"
4.
CHECK COMMUNICATION SIGNAL
Check signal between display unit harness connector M141 terminal
22 and ground with an oscilloscope or CONSULT.
Are voltage readings as specified?
YES
>> Inspection End.
NO
>> Replace display unit. Refer to
AV-314, "Removal and Installation"
(+)
(-)
Reference signal
Connector
Terminal
M141
11
Ground
ALNIA0311GB
PKIB5039J
(+)
(-)
Reference signal
Connector
Terminal
M141
22
Ground
ALNIA0312GB
PKIB5039J
AV-226
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/O BOSE]
U1263 USB
U1263 USB
DTC Logic
INFOID:0000000010064865
Diagnosis Procedure
INFOID:0000000010064866
1.
CHECK USB HARNESS
Visually check USB harness.
Is the inspection result normal?
YES
>> Replace AV control unit. Refer to
AV-311, "Removal and Installation"
NO
>> Replace USB harness.
DTC
Display contents of
CONSULT
DTC detection condition
Possible malfunction factor
U1263
USB OVERCURRENT
[U1263]
Detection of over current in USB interface.
Check USB harness between the AV
control unit and USB interface.
AV
U1255 SATELLITE RADIO TUNER
AV-227
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/O BOSE]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U1255 SATELLITE RADIO TUNER
Description
INFOID:0000000010064867
DTC Logic
INFOID:0000000010064868
Diagnosis Procedure
INFOID:0000000010064869
Regarding Wiring Diagram information, refer to
AV-282, "Wiring Diagram - Without BOSE Audio System With-
1.
CHECK SATELLITE RADIO TUNER POWER SUPPLY AND GROUND CIRCUIT
Check satellite radio tuner power supply and ground circuit. Refer to
AV-234, "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 M116 and satellite radio
tuner connector B111.
3. Check continuity between AV control unit harness connector
M116 (A) and satellite radio tuner harness connector B111 (B).
4. Check continuity between AV control unit harness connector M116 (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
M116
28
B111
28
Yes
29
29
30
30
A
—
Continuity
Connector
Terminals
AWNIA2034ZZ
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