Nissan Pathfinder. Manual — part 79
AV
U1310 AV CONTROL UNIT
AV-143
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U1310 AV CONTROL UNIT
DTC Logic
INFOID:0000000009174468
CONSULT Display
DTC Detection Condition
Possible Cause
CONTROL UNIT (AV)
[U1310]
An initial diagnosis error is detected in AV com-
munication circuit.
Replace the AV control unit if the malfunction occurs
constantly.
Refer to
AV-187, "Removal and Installation"
.
AV-144
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure
INFOID:0000000009174469
Regarding Wiring Diagram information, refer to
1.
CHECK FUSE
Check that the following fuses are not blown.
Are the fuses blown?
YES
>> Replace the blown fuse after repairing the affected circuit.
NO
>> GO TO 2.
2.
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connectors M124 and M125.
3. Check voltage between AV control unit connectors and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness or connectors.
3.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between AV control unit connector M125 terminal 52 and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace harness or connectors.
DISPLAY UNIT
DISPLAY UNIT : Diagnosis Procedure
INFOID:0000000009174470
Regarding Wiring Diagram information, refer to
1.
CHECK INVERTER VCC AND SIGNAL VCC (POWER SUPPLY) CIRCUIT 1
Terminal No.
Signal name
Fuse No.
29
Ignition signal
29 (5A)
39
ACC power supply
65 (10A)
51
Battery power supply
15 (15A)
AV control unit
Ground
Condition
Voltage
(Approx.)
Connector
Terminal
M124
29
—
Ignition switch: ON
Battery voltage
M125
39
Ignition switch: ACC
51
Ignition switch: OFF
AV control unit
Ground
Continuity
Connector
Terminal
M125
52
—
Yes
AV
POWER SUPPLY AND GROUND CIRCUIT
AV-145
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
C
D
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G
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B
A
O
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Check voltage between display unit harness connector M93 terminals 2, 3 and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 2.
2.
CHECK INVERTER VCC AND SIGNAL VCC (POWER SUPPLY) CIRCUIT CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M136 and display unit connector.
3. Check continuity between AV control unit connector M136 terminals 64, 76 and display unit connector
M93 terminals 3, 2.
4. Check continuity between AV control unit connector M136 terminals 64, 76 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness or connectors.
3.
CHECK INVERTER VCC AND SIGNAL VCC (POWER SUPPLY) CIRCUIT 2
1. Connect the AV control unit connector M45.
2. Check voltage between AV control unit connector M136 terminals 64, 76 and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace AV control unit. Refer to
AV-187, "Removal and Installation"
.
4.
CHECK INVERTER GROUND AND SIGNAL GROUND CIRCUIT CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M45 and display unit connector.
3. Check continuity between AV control unit connector M136 terminals 63, 75 and display unit connector
M93 terminals 14, 13.
Display unit
Ground
Condition
Voltage
(Approx.)
Connector
Terminal
M93
2
—
Ignition switch: ACC
9.0 V
3
AV control unit
Display unit
Continuity
Connector
Terminal
Connector
Terminal
M136
64
M93
3
Yes
76
2
AV control unit
Ground
Continuity
Connector
Terminal
M136
64
—
No
76
AV control unit
Ground
Condition
Voltage
(Approx.)
(+)
(
−)
Connector
Terminal
M136
64
—
Ignition switch: ACC
9.0 V
76
AV-146
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness or connectors.
5.
CHECK DISPLAY UNIT GROUND CIRCUIT
Check continuity between display unit connector M93 terminal 1 and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace harness or connectors.
SATELLITE RADIO TUNER
SATELLITE RADIO TUNER : Diagnosis Procedure
INFOID:0000000009174471
Regarding Wiring Diagram information, refer to
1.
CHECK FUSE
Check that the following fuses are not blown.
Are the fuses blown?
YES
>> Replace the blown fuse after repairing the affected circuit.
NO
>> GO TO 2.
2.
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner connector B2.
3. Check voltage between satellite radio tuner connector B2 terminal 32, 36 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness or connectors.
3.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between satellite radio tuner connector B2 terminal 35 and ground.
AV control unit
Display unit
Continuity
Connector
Terminal
Connector
Terminal
M136
63
M93
14
Yes
75
13
Display unit
Ground
Continuity
Connector
Terminal
M93
1
—
Yes
Terminal No.
Signal name
Fuse No.
32
Battery power supply
15 (15A)
36
ACC power supply
65 (10A)
Satellite radio tuner
Ground
Condition
Voltage
(Approx.)
Connector
Terminal
B2
32
—
Ignition switch: OFF
Battery voltage
36
Ignition switch: ACC
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