display NISSAN TEANA 2008 Repair Manual

AV-72
< COMPONENT DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003882713
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring. Each
control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to LAN-22, "
CAN Communication Signal Chart".
DTC LogicINFOID:0000000003882714
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003882715
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result” of “MULTI AV”.
Is
“CAN COMM CIRCUIT” displayed?
YES >> Refer to “LAN system”. Refer to LAN-14, "Trouble Diagnosis Flow Chart".
NO >> Refer to GI section. Refer to GI-35, "
Intermittent Incident".
DTCDisplay contents of CON-
SULT-IIIDiagnostic item is detected when... Probable malfunction location
U1000 CAN COMM CIRCUITWhen AV control unit is not transmitting or re-
ceiving CAN communication signal for 2 sec-
onds or more.CAN communication system

AV
U1010 CONTROL UNIT (CAN)
AV-73
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U1010 CONTROL UNIT (CAN)
DescriptionINFOID:0000000003882716
Initial diagnosis of AV control unit.
DTC LogicINFOID:0000000003882717
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003882718
1.REPLACE AV CONTROL UNIT
When DTC U1010 is detected, replace AV control unit.
>> INSPECTION END
DTCDisplay contents of CON-
SULT-IIIDiagnostic item is detected when... Probable malfunction location
U1010 CONTROL UNIT (CAN) CAN initial diagnosis malfunction is detected. AV control unit

AV-74
< COMPONENT DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
U1310 AV CONTROL UNIT
U1310 AV CONTROL UNIT
DescriptionINFOID:0000000003882719
Replace the AV control unit if this DTC is displayed. Refer to AV-170, "Removal and Installation".
DTC LogicINFOID:0000000003882720
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.
DTCDisplay contents of
CONSULT-IIIDTC Detection Condition Action to take
U1310CONTROL UNIT (AV)
[U1310]AV communication circuit initial diagnosis malfunction is
detected.Replace AV control unit.

AV
U1200 AV CONTROL UNIT
AV-75
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U1200 AV CONTROL UNIT
DescriptionINFOID:0000000003882721
Replace the AV control unit if this DTC is displayed. Refer to AV-170, "Removal and Installation".
DTC LogicINFOID: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.
DTCDisplay contents of
CONSULT-IIIDTC Detection Condition Action to take
U1200Cont 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
DescriptionINFOID:0000000003882723
Replace the AV control unit if this DTC is displayed. Refer to AV-170, "Removal and Installation".
DTC LogicINFOID: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.
DTCDisplay contents of
CONSULT-IIIDTC Detection Condition Action to take
U1216CAN CONT
[U1216]Internal malfunction of AV control unit (CAN controller) is
detected.Replace AV control unit.

AV
U1243 DISPLAY UNIT
AV-77
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U1243 DISPLAY UNIT
DescriptionINFOID:0000000003882725
DTC LogicINFOID:0000000003882726
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID: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.
DTCDisplay contents of
CONSULT-IIIDTC Detection Condition Possible causes
U1243FRONT 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
M4911
M12956
Existed
22 44
Display unit
GroundContinuity
Connector Terminals
M4911
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 GroundWhen adjusting display bright-
ness.
PKIB5039J
(+)
(−) Condition Reference value Display unit
Connector Terminal
M49 22 GroundWhen adjusting display bright-
ness.
PKIB5039J

AV
U1250 CAMERA CONTROL UNIT
AV-79
< COMPONENT DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
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U1250 CAMERA CONTROL UNIT
DescriptionINFOID:0000000003882728
DTC LogicINFOID:0000000003882729
Diagnosis ProcedureINFOID:0000000003901201
1.CHECK CONTINUITY RECOGNITION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and camera control unit connector.
3. Check continuity between AV control unit harness connector and camera control unit harness connector.
4. Check continuity between display unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK AV CONTROL UNIT VOLTAGE
1. Connect AV control unit connector and camera control unit connector.
2. Turn ignition switch ON.
3. Check signal between AV control unit harness connector terminal and ground using an oscilloscope.
Is inspection result normal?
YES >> Replace AV control unit.
Part name Description
CAMERA CONTROL UNIT Camera image signal is input from rear view camera. Camera image signal
output to AV control unit.
 Power supply is transmitted to rear view camera.
 AV control unit recognizes the presence of camera system with camera con-
nection recognition signal.
 Camera control unit is connected via AV communication.
DTCDisplay contents of
CONSULT-IIIDTC Detection Condition Possible causes
U1250CAMERA CONT. CONN
[U1250]Malfunction is detected in camera connection recogni-
tion signal circuit.Camera connection recognition sig-
nal circuit.
AV control unit Camera control unit
Continuity
Connector Terminals Connector Terminals
M130 68 B251 14 Existed
AV control unit
GroundContinuity
Connector Terminals
M130 68 Not existed
(+)
(−) ConditionVo l ta g e
(Approx.) AV control unit
Connector Terminal
M130 68 GroundConnected camera
control unit connector0 V
Disconnect camera
control unit connector5 V

AV-80
< COMPONENT DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
U1250 CAMERA CONTROL UNIT
NO >> Replace camera control unit.

AV
U1300 AV COMM CIRCUIT
AV-81
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U1300 AV COMM CIRCUIT
DescriptionINFOID:0000000003882731
U1300 is indicated when malfunction occurs in communication signal of multi AV system. Indicated simulta-
neously, without fail, with the malfunction of control units connected to AV control unit with communication line.
Determine the possible malfunction cause from the table below.
Self-diagnosis results display item
DTCDisplay contents of
CONSULT-IIIDescriptionPossible malfunction factor/Action to
take
U1300
U1240 AV COMM CIRCUIT
[U1300]
 SWITCH CONN
[U1240]When either one of the following items is detected:
 multifunction switch power supply and ground circuits
are malfunctioning.
 AV communication circuits between AV control unit and
multifunction switch are malfunctioning.
 AV communication signal between AV control unit and
multifunction switch is malfunctioning. Multifunction switch power supply
and ground circuits
Refer toAV- 8 3 , "
MULTIFUNCTION
SWITCH : Diagnosis Procedure".
 AV communication circuits be-
tween AV control unit and multi-
function switch
U1300
U1252 AV COMM CIRCUIT
[U1300]
 REAR-CAMERA LAN
CONN [U1252]With rear control switch
When either one of the following items is detected:
 camera control unit power supply and ground circuits
are malfunctioning.
 AV communication signal between AV control unit and
camera control unit is malfunctioning.
 AV communication circuits between multifunction
switch and rear control switch are malfunctioning.
 AV communication circuits between rear control switch
and camera control unit are malfunctioning. Camera control unit power supply
and ground circuits
Refer to AV- 8 4 , "
CAMERA CON-
TROL UNIT : Diagnosis Proce-
dure".
 AV communication circuits be-
tween multifunction switch and rear
control switch
 AV communication circuits be-
tween rear control switch and cam-
era control unit
Without rear control switch
When either one of the following items is detected:
 camera control unit power supply and ground circuits
are malfunctioning.
 malfunction is detected in AV communication circuits
between multifunction switch and camera control unit.
 AV communication signal between AV control unit and
multifunction switch is malfunctioning. Camera control unit power supply
and ground circuits
Refer to AV- 8 4 , "
CAMERA CON-
TROL UNIT : Diagnosis Proce-
dure".
 AV communication circuits be-
tween multifunction switch and
camera control unit
U1300
U1240
U1252 AV COMM CIRCUIT
[U1300]
 SWITCH CONN
[U1240]
 REAR-CAMERA LAN
CONN [U1252]When either one of the following items is detected:
 AV communication circuits between AV control unit and
multifunction switch are malfunctioning.
 AV communication signal between AV control unit and
multifunction switch is malfunctioning.AV communication circuits between
AV control unit and multifunction
switch