Infiniti G35 (V35) Sedan. Manual — part 97
AV-160
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
U1300 AV COMM CIRCUIT
U1300 AV COMM CIRCUIT
Description
INFOID:0000000000964657
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]
• Mutifunction switch power supply and ground circuit
malfunction is detected
• A malfunction is detected in communication circuit be-
tween AV control unit and multifunction switch
• A malfunction is detected in communication signal be-
tween AV control unit and multifunction switch
• Multifunction switch power supply
and ground circuits
• Communication circuit between AV
control unit and multifunction
switch
U1300
U1256
• AV COMM CIRCUIT
[U1300]
• HAND FREE CONN
[U1256]
• TEL adapter unit power supply and ground circuit mal-
function is detected
• Malfunction is detected in communication circuit be-
tween TEL adapter unit and AV control unit
• Malfunction is detected in communication signal be-
tween TEL adapter unit and AV control unit
• TEL adapter unit power supply and
ground circuit
• Communication circuit between
TEL adapter unit and AV control
unit
U1300
U1240
U1256
• AV COMM CIRCUIT
[U1300]
• SWITCHE CONN
[U1240]
• HAND FREE CONN
[U1256]
Malfunction is detected in communication circuit between
AV control unit and the branch point multifunction switch
and TEL adapter unit
Communication circuit between AV
control unit and the branch point mul-
tifunction switch and TEL adapter unit
AV
POWER SUPPLY AND GROUND CIRCUIT
AV-161
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
C
D
E
F
G
H
I
J
K
L
M
B
N
A
O
P
POWER SUPPLY AND GROUND CIRCUIT
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure
INFOID:0000000000964658
1.
CHECK FUSE
Check for blown fuses.
Is inspection result OK?
YES
>> GO TO 2.
NO
>> Be sure to eliminate cause of malfunction before installing new fuse.
2.
CHECK POWER SUPPLY CIRCUIT
Check voltage between AV control unit harness connectors and ground.
Is inspection result OK?
YES
>> GO TO 3.
NO
>> Check harness between AV control unit and fuse.
3.
CHECK GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect AV control unit connectors.
3.
Check continuity between AV control unit harness connectors and ground.
Is inspection result OK?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
DISPLAY UNIT
DISPLAY UNIT : Diagnosis Procedure
INFOID:0000000000964659
1.
CHECK POWER SUPPLY CIRCUIT (DISPLAY SIDE)
Check voltage between Display unit harness connector and ground.
Is inspection result OK?
YES
>> GO TO 4.
NO
>> GO TO 2.
Power source
Fuse No.
Battery
34
Ignition switch ACC or ON
19
Ignition switch ON or START
3
Signal name
Connector No.
Terminal No.
Ignition switch position
Value (Approx.)
Battery power supply
M81
19
OFF
12 V
ACC power supply
M81
7
ACC
12 V
Ignition signal
M85
104
ON
12 V
Signal name
Connector No.
Terminal No.
Ignition switch position
Continuity
Ground
M81
20
OFF
Continuity should exist.
M85
85
Signal name
Connector No.
Terminal No.
Ignition switch position
Value (Approx.)
Inverter VCC
M71
2
ACC
9 V
Signal VCC
3
AV-162
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
POWER SUPPLY AND GROUND CIRCUIT
2.
CHECK POWER SUPPLY CIRCUIT (CONTINUITY)
1.
Turn ignition switch OFF.
2.
Disconnect the harness connector between display unit and AV control unit.
3.
Check continuity between display unit harness connector M71 and AV control unit harness connector M83
.
4.
Check continuity between display unit harness connector M71 and ground.
Is inspection result OK?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK POWER SUPPLY CIRCUIT (AV CONTROL UNIT SIDE)
1.
Connect the AV control unit harness connector.
2.
Turn ignition switch ACC.
3.
Check voltage between AV control unit harness connector and ground.
Is inspection result OK?
YES
>> INSPECTION END
NO
>> Replacement of AV control unit.
4.
CHECK GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect Display unit connector.
3.
Check continuity between Display unit harness connectors and ground.
Is inspection result OK?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
MULTIFUNCTION SWITCH
MULTIFUNCTION SWITCH : Diagnosis Procedure
INFOID:0000000000964660
1.
CHECK FUSE
Check for blown fuses.
Is inspection result OK?
YES
>> GO TO 2.
NO
>> Be sure to eliminate cause of malfunction before installing new fuse.
Signal name
Display unit (M71)
AV control unit (M83)
Continuity
Inverter VCC
2
59
Continuity should exist.
Signal VCC
3
47
Continuity should exist.
Signal name
Display unit (M71)
—
Continuity
Inverter VCC
2
Ground
Continuity should not exist.
Signal VCC
3
Ground
Continuity should not exist.
Signal name
Connector No.
Terminal No.
Ignition switch position
Value (Approx.)
Inverter VCC
M83
59
ACC
9 V
Signal VCC
47
Signal name
Connector No.
Terminal No.
Ignition switch position
Continuity
Ground
M71
1
OFF
Continuity should exist.
Power source
Fuse No.
Ignition switch ACC or ON
19
AV
POWER SUPPLY AND GROUND CIRCUIT
AV-163
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITHOUT NAVIGATION]
C
D
E
F
G
H
I
J
K
L
M
B
N
A
O
P
2.
CHECK POWER SUPPLY CIRCUIT
Check voltage between multifunction switch harness connector and ground.
Is inspection result OK?
YES
>> GO TO 3.
NO
>> Check harness between multifunction switch and fuse.
3.
CHECK GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect multifunction switch connector.
3.
Check continuity between multifunction switch harness connector and ground.
Is inspection result OK?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
SATELLITE RADIO TUNER
SATELLITE RADIO TUNER : Diagnosis Procedure
INFOID:0000000000964661
1.
CHECK FUSE
Check for blown fuses.
Is inspection result OK?
YES
>> GO TO 2.
NO
>> Be sure to eliminate cause of malfunction before installing new fuse.
2.
CHECK POWER SUPPLY CIRCUIT
Check voltage between satellite radio tuner harness connector and ground.
Is inspection result OK?
YES
>> INSPECTION END
NO
>> Check harness between satellite radio tuner and fuse.
TEL ADAPTER UNIT
TEL ADAPTER UNIT : Diagnosis Procedure
INFOID:0000000000964662
1.
CHECK FUSE
Check for blown fuses.
Signal name
Connector No.
Terminal No.
Ignition switch position
Value (Approx.)
ACC power supply
M72
3
ACC
12 V
Signal name
Connector No.
Terminal No.
Ignition switch position
Continuity
Ground
M72
1
OFF
Continuity should exist.
Power source
Fuse No.
Battery
34
Ignition switch ACC or ON
19
Signal name
Connector No.
Terminal No.
Ignition switch position
Value (Approx.)
Battery power supply
B236
12
OFF
12 V
ACC power supply
B236
16
ACC
12 V
Power source
Fuse No.
Battery
34
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