Infiniti EX35. Instruction - page 67
AV
U1255 SATELLITE RADIO TUNER
AV-49
< COMPONENT DIAGNOSIS >
[BASE AUDIO WITHOUT NAVIGATION]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
3.
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 and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit.
4.
CHECK SATELLITE RADIO TUNER
1.
Turn ignition switch OFF.
2.
Disconnect AV control unit connector.
3.
Connect satellite radio tuner.
4.
Turn ignition switch ON.
5.
Check voltage between satellite radio tuner harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace satellite radio tuner.
(+)
(
−
)
Voltage
(Approx.)
AV control unit
Connector
Terminals
M82
28
Ground
7.5 V
29
7.0 V
(+)
(
−
)
Voltage
(Approx.)
Satellite radio tuner
Connector
Terminal
M236
10
Ground
7.0 V
AV-50
< COMPONENT DIAGNOSIS >
[BASE AUDIO WITHOUT NAVIGATION]
U1300 AV COMM CIRCUIT
U1300 AV COMM CIRCUIT
Description
INFOID:0000000003508391
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]
When either one of the following items is detected:
• Multifunction switch power supply and ground circuits
malfunction is detected.
• Malfunction is detected in AV communication circuits
between AV control unit and multifunction switch.
• Multifunction switch power supply
and ground circuits.
• AV communication circuits be-
tween AV control unit and multi-
function switch.
U1300
U1252
• AV COMM CIRCUIT
[U1300]
• REAR CAMERA
CONN
[U1252]
When either one of the following items is detected:
• Camera control unit power supply and ground circuits
malfunction is detected.
• Malfunction is detected in AV communication circuits
between camera control unit and the junction of AV
control unit and AV control unit and multifunction
switch.
• Camera control unit power supply
and ground circuits.
• AV communication circuits be-
tween camera control unit and the
junction of AV control unit and AV
control unit and multifunction
switch.
U1300
U1240
U1252
• AV COMM CIRCUIT
[U1300]
• SWITCH CONN
[U1240]
• REAR CAMERA
CONN
[U1252]
Malfunction is detected in AV communication circuits be-
tween AV control unit and the junction of camera control
unit and multifunction switch.
AV communication circuits between
AV control unit and the junction of
camera control unit and multifunction
switch.
AV
POWER SUPPLY AND GROUND CIRCUIT
AV-51
< COMPONENT DIAGNOSIS >
[BASE AUDIO WITHOUT NAVIGATION]
C
D
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B
A
O
P
POWER SUPPLY AND GROUND CIRCUIT
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure
INFOID:0000000003508392
1.
CHECK FUSE
Check for blown fuses.
Is the inspection result normal?
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 the inspection result normal?
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 the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
DISPLAY UNIT
DISPLAY UNIT : Diagnosis Procedure
INFOID:0000000003508393
1.
CHECK POWER SUPPLY CIRCUIT (DISPLAY SIDE)
Check voltage between display unit harness connectors and ground.
Is the inspection result normal?
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
Battery voltage
ACC power supply
M81
7
ACC
Battery voltage
Ignition signal
M85
104
ON
Battery voltage
Signal name
Connector No.
Terminal No.
Ignition switch position
Continuity
Ground
M81
17
OFF
Existed
M81
20
M85
85
Signal name
Connector No.
Terminal No.
Ignition switch position
Value (Approx.)
Inverter VCC
M71
2
ACC
9 V
Signal VCC
3
AV-52
< COMPONENT DIAGNOSIS >
[BASE 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 connectors and AV control unit harness connector.
4.
Check continuity between display unit harness connectors and ground.
Is the inspection result normal?
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 connectors and ground.
Is the inspection result normal?
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 connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
MULTIFUNCTION SWITCH
MULTIFUNCTION SWITCH : Diagnosis Procedure
INFOID:0000000003508394
1.
CHECK FUSE
Check for blown fuses.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Be sure to eliminate cause of malfunction before installing new fuse.
2.
CHECK POWER SUPPLY CIRCUIT
Signal name
Display unit (M71)
AV control unit (M83)
Continuity
Inverter VCC
2
59
Existed
Signal VCC
3
47
Existed
Signal name
Display unit (M71)
—
Continuity
Inverter VCC
2
Ground
Not existed
Signal VCC
3
Ground
Not existed
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
Existed
Power source
Fuse No.
Ignition switch ACC or ON
19