Nissan Teana J32. Instruction — part 55
AV
U1200 AV CONTROL UNIT
AV-75
< COMPONENT DIAGNOSIS >
[BASE AUDIO AND DISPLAY SYSTEM]
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U1200 AV CONTROL UNIT
Description
INFOID:0000000003882721
Replace the AV control unit if this DTC is displayed. Refer to
AV-170, "Removal and Installation"
.
DTC Logic
INFOID:0000000003882722
DTC DETECTION LOGIC
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 communication. It operates each system according to communication
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 is connected to BCM via CAN communication transmitting/receiving for the
vehicle settings function.
• AUX image signal is input from auxiliary jacks.
• Camera image signal is input from camera control unit.
• Composite image (AUX and camera images) signal is output to display unit.
• AUX sound signal is input from the auxiliary jacks.
• Power (signal VCC and inverter VCC) is transmitted to front display unit.
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Action to take
U1200
Cont Unit
FLASH- ROM
[U1200]
AV control unit malfunction is detected. (FLASH-ROM).
Replace AV control unit.
AV-76
< COMPONENT DIAGNOSIS >
[BASE AUDIO AND DISPLAY SYSTEM]
U1216 AV CONTROL UNIT
U1216 AV CONTROL UNIT
Description
INFOID:0000000003882723
Replace the AV control unit if this DTC is displayed. Refer to
AV-170, "Removal and Installation"
.
DTC Logic
INFOID:0000000003882724
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 communication. It operates each system according to communication
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 is connected to BCM via CAN communication transmitting/receiving for the
vehicle settings function.
• AUX image signal is input from auxiliary jacks.
• Camera image signal is input from camera control unit.
• Composite image (AUX and camera images) signal is output to display unit.
• AUX sound signal is input from the auxiliary jacks.
• Power (signal VCC and inverter VCC) is transmitted to front display unit.
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Action to take
U1216
CAN CONT
[U1216]
Internal malfunction of AV control unit (CAN controller) is
detected.
Replace AV control unit.
AV
U1243 DISPLAY UNIT
AV-77
< COMPONENT DIAGNOSIS >
[BASE AUDIO AND DISPLAY SYSTEM]
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U1243 DISPLAY UNIT
Description
INFOID:0000000003882725
DTC Logic
INFOID:0000000003882726
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000003901200
1.
CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit. Refer to
AV-82, "DISPLAY UNIT : Diagnosis Procedure"
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair malfunctioning parts.
2.
CHECK CONTINUITY 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 and AV control unit harness connector.
4.
Check continuity between display unit harness connector and ground.
Is inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
Part name
Description
DISPLAY UNIT
• Display image is controlled by the serial communication from AV control unit.
• It receives the power (signal VCC and inverter VCC) from the AV control unit
and operates.
• RGB image signal is input from AV control unit (RGB, RGB area and RGB syn-
chronizing).
• Composite image (DVD, AUX and camera images) signal is input from AV con-
trol unit.
• Synchronize signal (HP, VP) is output to AV control unit.
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1243
FRONT DISP CONN
[U1243]
When either one of the following items is detected:
• display unit power supply and ground circuits are mal-
functioning.
• serial communication circuits between display unit and
AV control unit are malfunctioning.
• serial communication signal between display unit and
AV control unit is malfunctioning.
• Display unit power supply and
ground circuits.
• Serial communication circuits be-
tween display unit and AV control
unit
Display unit
AV control unit
Continuity
Connector
Terminals
Connector
Terminals
M49
11
M129
56
Existed
22
44
Display unit
Ground
Continuity
Connector
Terminals
M49
11
Not existed
22
AV-78
< COMPONENT DIAGNOSIS >
[BASE AUDIO AND DISPLAY SYSTEM]
U1243 DISPLAY UNIT
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 terminal and ground using an oscilloscope.
Is inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit.
4.
CHECK COMMUNICATION SIGNAL
Check signal between display unit harness connector terminal and ground using an oscilloscope.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Replace display unit.
(+)
(
−
)
Condition
Reference value
Display unit
Connector
Terminal
M49
11
Ground
When adjusting display bright-
ness.
PKIB5039J
(+)
(
−
)
Condition
Reference value
Display unit
Connector
Terminal
M49
22
Ground
When adjusting display bright-
ness.
PKIB5039J
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