Nissan Pathfinder (2011 year). Instruction — part 30
AV
U1240 SWITCH CONN
AV-59
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO]
C
D
E
F
G
H
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M
B
A
O
P
U1240 SWITCH CONN
Description
INFOID:0000000006246463
U1240 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
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1240
• SWITCH CONN
[U1240]
• A/C and AV switch assembly power supply and ground
circuit malfunction is detected
• A malfunction is detected in communication circuit be-
tween AV control unit and A/C and AV switch assembly
• A malfunction is detected in communication signal be-
tween AV control unit and A/C and AV switch assembly
• A/C and AV switch assembly power
supply and ground circuits
• Communication circuit between AV
control unit and A/C and AV switch
assembly
2011 Pathfinder
AV-60
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO]
U1243 DISPLAY UNIT
U1243 DISPLAY UNIT
Description
INFOID:0000000006246464
DTC Logic
INFOID:0000000006246465
Diagnosis Procedure
INFOID:0000000006246466
Regarding Wiring Diagram information, refer to
1.
CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit. Refer to
AV-65, "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 M93
(A) terminals 11, 22 and AV control unit harness connector
M133 (B) terminals 56, 44.
4. Check continuity between display unit harness connector M93
(A) terminals 11, 22 and ground.
Are continuity results as specified?
YES
>> GO TO 3
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-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
M93
11
M133
56
Yes
22
44
A
—
Continuity
Connector
Terminal
M93
11
Ground
No
22
ALNIA0310GB
2011 Pathfinder
AV
U1243 DISPLAY UNIT
AV-61
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO]
C
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F
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B
A
O
P
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 M93 ter-
minal 11 and ground with an oscilloscope or CONSULT-III.
Are voltage readings as specified?
YES
>> GO TO 4
NO
>> Replace AV control unit. Refer to
AV-113, "Removal and Installation"
4.
CHECK COMMUNICATION SIGNAL
Check signal between display unit harness connector M93 terminal
22 and ground with an oscilloscope or CONSULT-III.
Are voltage readings as specified?
YES
>> Inspection End.
NO
>> Replace display unit. Refer to
AV-115, "Removal and Installation"
.
(+)
(-)
Reference signal
Connector
Terminal
M93
11
Ground
ALNIA0311GB
PKIB5039J
(+)
(-)
Reference signal
Connector
Terminal
M93
22
Ground
ALNIA0312GB
PKIB5039J
2011 Pathfinder
AV-62
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO]
U1300 AV COMM CIRCUIT
U1300 AV COMM CIRCUIT
Description
INFOID:0000000006246473
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
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1300
U1240
• AV COMM CIRCUIT
[U1300]
• SWITCH CONN
[U1240]
• A/C and AV switch assembly power supply and ground
circuit malfunction is detected
• A malfunction is detected in communication circuit be-
tween AV control unit and A/C and AV switch assembly
• A malfunction is detected in communication signal be-
tween AV control unit and A/C and AV switch assembly
• A/C and AV switch assembly power
supply and ground circuits
• Communication circuit between AV
control unit and A/C and AV switch
assembly
2011 Pathfinder
AV
U1310 AV CONTROL UNIT
AV-63
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO]
C
D
E
F
G
H
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M
B
A
O
P
U1310 AV CONTROL UNIT
Description
INFOID:0000000006246474
Replace the AV control unit if this DTC is displayed. Refer to
AV-113, "Removal and Installation"
DTC Logic
INFOID:0000000006246475
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 means of communication. It operates each system according to com-
munication 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 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
U1310
CONTROL UNIT (AV)
[U1310]
An initial diagnosis error is detected in AV communication
circuit.
Replace AV control unit. Refer to
113, "Removal and Installation"
2011 Pathfinder
AV-64
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure
INFOID:0000000006246476
Regarding Wiring Diagram information, refer to
1.
CHECK FUSES
Check that the following fuses of the AV control unit are not are not blown.
Are the fuses OK?
YES
>> GO TO 2
NO
>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.
POWER SUPPLY CIRCUIT CHECK
1. Disconnect AV control unit connectors M131 and M135.
2. Check voltage between the AV control unit connectors M131
and M135 and ground.
Are the voltage results as specified?
YES
>> GO TO 3
NO
>> • Check connector housings for disconnected or loose
terminals.
• Repair harness or connector.
3.
GROUND CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Check continuity between AV control unit harness connectors M131, M133, M134, M135 and ground.
Unit
Terminals
Signal name
Fuse No.
AV control unit
19
Battery power
29
7
Ignition switch ACC or ON
4
104
Ignition switch ON or START
12
(+)
(-)
OFF
ACC
ON
Connector
Terminal
M131
7
Ground
0V
Battery
voltage
Battery
voltage
19
Ground
Battery
voltage
Battery
voltage
Battery
voltage
M135
104
Ground
0V
0V
Battery
voltage
ALNIA0875GB
2011 Pathfinder
AV
POWER SUPPLY AND GROUND CIRCUIT
AV-65
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO]
C
D
E
F
G
H
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K
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M
B
A
O
P
Are the continuity results as specified?
YES
>> Inspection End.
NO
>> Repair AV control unit ground.
DISPLAY UNIT
DISPLAY UNIT : Diagnosis Procedure
INFOID:0000000006246477
Regarding Wiring Diagram information, refer to
1.
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch to ACC.
2. Check voltage between display unit harness connector M93 and
ground.
Does specified voltage exist?
YES
>> GO TO 3
NO
>> GO TO 2
2.
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the display unit connector M93 and the AV control
unit connector M133.
3. Check continuity between the display unit harness connector
M93 (A) and the AV control unit connector M133 (B).
4. Check continuity between the display unit harness connector M93 (A) and ground.
Are continuity results as specified?
YES
>> Check AV control unit power and ground supply. Refer to
AV-64, "AV CONTROL UNIT : Diagnosis
.
NO
>> Repair harness or connector.
(+)
(-)
Continuity
Connector
Terminal
M131
20
Ground
Yes
M133
54
M134
68
M135
85
Signal name
Connector
Terminal
Ignition switch
position
Value (Approx.)
Inverter VCC
M93
2
ACC
9V
Signal VCC
3
ALNIA0317GB
A
B
Continuity
Connector
Terminal
Connector
Terminal
M93
2
M133
59
Yes
3
47
A
—
Continuity
Connector
Terminal
M93
2
Ground
No
3
ALNIA0318GB
2011 Pathfinder
AV-66
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO]
POWER SUPPLY AND GROUND CIRCUIT
3.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display unit connector.
3. Check continuity between display unit harness connector and
ground.
Does continuity exist?
YES
>> Inspection End.
NO
>> Repair harness or connector.
A/C AND AV SWITCH ASSEMBLY
A/C AND AV SWITCH ASSEMBLY : Diagnosis Procedure
INFOID:0000000006246478
Regarding Wiring Diagram information, refer to
1.
CHECK FUSE
Check that the fuse of the AC and AV switch assembly is not blown.
Is the fuse OK?
YES
>> GO TO 2
NO
>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.
POWER SUPPLY CIRCUIT CHECK
1. Disconnect A/C and AV switch assembly connector M98.
2. Check voltage between the A/C and AV switch assembly con-
nector M98 and ground.
Are the voltage results as specified?
YES
>> GO TO 3
NO
>> • Check connector housings for disconnected or loose
terminals.
• Repair harness or connector.
3.
GROUND CIRCUIT CHECK
Connector
Terminal
—
Continuity
M93
1
Ground
Yes
ALNIA0319GB
Unit
Terminal
Signal name
Fuse No.
A/C and AV switch assembly
2
Ignition switch ACC or ON
4
(+)
(-)
OFF
ACC
ON
Connector
Terminal
M98
2
Ground
0V
Battery
voltage
Battery
voltage
ALNIA0315GB
2011 Pathfinder
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