Nissan Pathfinder (2009 year). Manual — part 68
AV-356
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
U121D AV CONTROL UNIT
U121D AV CONTROL UNIT
Description
INFOID:0000000003939210
Replace the AV control unit if this DTC is displayed. Refer to
AV-455, "Removal and Installation"
.
DTC Logic
INFOID:0000000003939211
Part name
Description
AV CONTROL UNIT
• Integrates HDD (hard disk drive) allowing map data and music data to be
stored.
• It is the master unit of the MULTI AV system, and it is connected to each control
unit by means of communication. It operates each system according to com-
munication signals from the AV control unit.
• The AV control unit includes the audio, hands-free phone, voice control, navi-
gation, and vehicle information functions.
• It is connected to ECM and combination meter via CAN communication to ob-
tain necessary information for the vehicle information function.
• It inputs the automatic brightness ON/OFF signals that are required for the dis-
play dimming control.
• It inputs the signals for driving status recognition (vehicle speed, reverse and
parking brake).
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Action to take
U121D
DSP CONN
[U121D]
Internal malfunction of AV control unit (DSP connection
error) is detected.
Replace AV control unit. Refer to
455, "Removal and Installation"
.
2009 Pathfinder
AV
U121E AV CONTROL UNIT
AV-357
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
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U121E AV CONTROL UNIT
Description
INFOID:0000000003939212
Replace the AV control unit if this DTC is displayed. Refer to
AV-455, "Removal and Installation"
.
DTC Logic
INFOID:0000000003939213
Part name
Description
AV CONTROL UNIT
• Integrates HDD (hard disk drive) allowing map data and music data to be
stored.
• It is the master unit of the MULTI AV system, and it is connected to each control
unit by means of communication. It operates each system according to com-
munication signals from the AV control unit.
• The AV control unit includes the audio, hands-free phone, voice control, navi-
gation, and vehicle information functions.
• It is connected to ECM and combination meter via CAN communication to ob-
tain necessary information for the vehicle information function.
• It inputs the automatic brightness ON/OFF signals that are required for the dis-
play dimming control.
• It inputs the signals for driving status recognition (vehicle speed, reverse and
parking brake).
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Action to take
U121E
DSP COMM
[U121E]
Internal malfunction of AV control unit (DSP communica-
tion error) is detected.
Replace AV control unit. Refer to
455, "Removal and Installation"
2009 Pathfinder
AV-358
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
U121F AV CONTROL UNIT
U121F AV CONTROL UNIT
Description
INFOID:0000000003939214
DTC Logic
INFOID:0000000003939215
Diagnosis Procedure
INFOID:0000000003939216
1.
CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check audio control unit power supply and ground circuit. Refer to
AV-367, "AV CONTROL UNIT : Diagnosis
.
Is inspection result OK?
YES
>> Inspection End.
NO
>> Repair malfunctioning parts.
Part name
Description
AV CONTROL UNIT
• Integrates HDD (hard disk drive) allowing map data and music data to be
stored.
• It is the master unit of the MULTI AV system, and it is connected to each control
unit by means of communication. It operates each system according to com-
munication signals from the AV control unit.
• The AV control unit includes the audio, hands-free phone, voice control, navi-
gation, and vehicle information functions.
• It is connected to ECM and combination meter via CAN communication to ob-
tain necessary information for the vehicle information function.
• It inputs the automatic brightness ON/OFF signals that are required for the dis-
play dimming control.
• It inputs the signals for driving status recognition (vehicle speed, reverse and
parking brake).
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Action to take
U121F
INTERNAL COMM
[U121F]
Internal malfunction of AV control unit (internal communi-
cation error) is detected.
AV control unit power supply and
ground circuit
2009 Pathfinder
AV
U1243 DISPLAY UNIT
AV-359
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
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U1243 DISPLAY UNIT
Description
INFOID:0000000003939217
DTC Logic
INFOID:0000000003939218
Diagnosis Procedure
INFOID:0000000003939219
1.
CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit. Refer to
AV-368, "DISPLAY UNIT : Diagnosis Procedure"
.
Is inspection result OK?
YES
>> GO TO 2
NO
>> Repair malfunctioning parts.
2.
CHECK CONTINUITY COMMUNICATION CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect display unit connector M92 and AV control unit connector M37.
3.
Check continuity between display unit harness connector M92
(A) terminals 11, 22 and AV control unit harness connector M37
(B) terminals 30, 31.
4.
Check continuity between display unit harness connector M92
(A) terminals 11, 22 and ground.
Are continuity results as specified?
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.
• RGB image signal is input from AV control unit (RGB, RGB area and RGB syn-
chronizing). Auxiliary image signal is input from the auxiliary input jack. Cam-
era image signal is input from the camera control unit.
• Synchronize signal (HP, VP) is output to AV control unit.
• Touch panel function can be operated for each system by touching a display
directly.
DTC
Display contents of
CONSULT-III
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
M92
11
M37
30
Yes
22
31
A
—
Continuity
Connector
Terminal
M92
11
Ground
No
22
AWNIA1787ZZ
2009 Pathfinder
AV-360
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
U1243 DISPLAY UNIT
3.
CHECK COMMUNICATION SIGNAL
1.
Connect display unit connector M92 and AV control unit connec-
tor M37.
2.
Turn ignition switch ON.
3.
Check signal between display unit harness connector M92 ter-
minal 11 and ground.
Are voltage readings as specified?
YES
>> GO TO 4
NO
>> Replace AV control unit. Refer to
AV-455, "Removal and Installation"
.
4.
CHECK COMMUNICATION SIGNAL
Check signal between display unit harness connector M92 terminal
22 and ground.
Are voltage readings as specified?
YES
>> Inspection End.
NO
>> Replace display unit. Refer to
AV-457, "Removal and Installation"
Connector
Terminals
Reference Signal
(+)
(-)
M92
11
Ground
ALNIA0398GB
PKIB5039J
Connector
Terminals
Reference Signal
(+)
(-)
M92
22
Ground
ALNIA0399GB
PKIB5039J
2009 Pathfinder
AV
U1244 GPS ANTENNA
AV-361
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
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U1244 GPS ANTENNA
Description
INFOID:0000000003939220
The GPS antenna receives satellite GPS signals.
DTC Logic
INFOID:0000000003939221
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000003939222
1.
GPS ANTENNA CHECK
Inspect GPS antenna and antenna feeder for damage or poor connection.
Is the GPS antenna and feeder clean and undamaged?
YES
>> GO TO 2
NO
>> Repair or replace malfunctioning parts.
2.
CHECK AV CONTROL UNIT VOLTAGE
1.
Turn ignition switch ON.
2.
Check voltage between AV control unit connector M72 terminal
109 and ground.
Is the voltage reading as specified?
YES
>> Replace GPS antenna. Refer to
NO
>> Replace AV control unit. Refer to
DTC
CONSULT-III display
Detection condition
U1244
GPS ANTENNA CONN
[U1244]
GPS antenna connection malfunction is detected.
109 - Ground
: Approx. 5V
ALNIA0541GB
2009 Pathfinder
AV-362
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
U1250 CAMERA CONTROL UNIT
U1250 CAMERA CONTROL UNIT
Description
INFOID:0000000003939223
DTC Logic
INFOID:0000000003939224
Diagnosis Procedure
INFOID:0000000003939225
1.
CHECK CAMERA-CONNECTION RECOGNITION SIGNAL CIRCUIT
1.
Disconnect AV control unit connector and camera control unit
connector.
2.
Check continuity between AV control unit harness connector
M48 (A) terminal 87 and camera control unit harness connector
B176 (B) terminal 5.
3.
Check continuity between AV control unit harness connector
M48 (A) terminal 87 and ground.
Are the continuity results as specified?
YES
>> GO TO 2
NO
>> Repair harness or connector.
2.
CHECK AV CONTROL UNIT VOLTAGE
1.
Connect AV control unit connector.
2.
Turn ignition switch ON.
3.
Check voltage between AV control unit harness connector M48
terminal 87 and ground.
Is voltage approximately 5 volts?
YES
>> Replace camera control unit. Refer to
.
Part name
Description
CAMERA CONTROL UNIT
• Camera image signal is input from rear view camera, and camera image is in-
dicated on the display.
• Power (camera ON signal) is sent to rear view camera.
• Controlled by audio communication sent from AV control unit.
• AV control unit recognizes the presence of camera system with camera con-
nection recognition signal.
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1250
CAMERA CONT. CONN
[U1250]
A malfunction is detected in camera-connection recogni-
tion signal circuit
Camera-connection recognition sig-
nal circuit
A
B
Continuity
Connector
Terminal
Connector
Terminal
M48
87
B176
5
Yes
A
—
Continuity
Connector
Terminal
M48
87
Ground
No
ALNIA0542GB
Connector
Terminals
Voltage
(+)
(-)
M48
87
Ground
Approx. 5V
ALNIA0543GB
2009 Pathfinder
AV
U1250 CAMERA CONTROL UNIT
AV-363
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
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NO
>> Replace AV control unit. Refer to
AV-455, "Removal and Installation"
.
2009 Pathfinder
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