Nissan Sentra. Instruction — part 69
AV-268
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION WITHOUT BOSE]
U12B1 POWER SUPPLY VOLTAGE
U12B1 POWER SUPPLY VOLTAGE
DTC Logic
INFOID:0000000009758971
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009758972
1.
CHECK CHARGING SYSTEM
Check the vehicle charging system. Refer to
STR-20, "Work Flow (With GR8-1200 NI)"
Is the inspection result normal?
YES
>> Replace the AV control unit. Refer to
AV-298, "Removal and Installation"
.
NO
>> Repair or replace the malfunctioning components.
CONSULT Display
DTC Detection Condition
Possible Cause
Supply Voltage Goes High >
16V for 20s
[U12B1]
AV control unit supply voltage exceeds upper lim-
its.
Charging system malfunction.
AV
U1310 AV CONTROL UNIT
AV-269
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION WITHOUT BOSE]
C
D
E
F
G
H
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K
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M
B
A
O
P
U1310 AV CONTROL UNIT
DTC Logic
INFOID:0000000009758973
DTC DETECTION LOGIC
CONSULT Display
DTC Detection Condition
Possible Cause
CONTROL UNIT (AV)
[U1310]
Error during CAN controller hardware initializa-
tion (MCAN).
Replace AV control unit if malfunction occurs
constantly.
Refer to
AV-298, "Removal and Installation"
.
AV-270
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION WITHOUT BOSE]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure
INFOID:0000000009758974
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 M103 and M104.
3. Check voltage between AV control unit connectors M103 and M104 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 M103 and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace harness or connectors.
Terminal No.
Signal name
Fuse No.
7
ACC power supply
18 (10A)
19
Battery power supply
26 (15A)
37
Ignition power supply
5 (10A)
AV control unit
Ground
Condition
Voltage
(Approx.)
Connector
Terminal
M103
19
—
Ignition switch: OFF
Battery voltage
7
Ignition switch: ON
M104
37
AV control unit
Ground
Continuity
Connector
Terminal
M103
20
—
Yes
AV
FRONT DOOR SPEAKER
AV-271
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION WITHOUT BOSE]
C
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B
A
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FRONT DOOR SPEAKER
Diagnosis Procedure
INFOID:0000000009758975
Regarding Wiring Diagram information, refer to
.
1.
CONNECTOR CHECK
Check the AV control unit and speaker connectors for the following:
• Proper connection
• Damage
• Disconnected or loose terminals
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Repair the terminals or connectors.
2.
CHECK FRONT DOOR SPEAKER SIGNAL CIRCUIT CONTINUITY
1. Disconnect AV control unit connector M103 and suspect front door speaker connector.
2. Check continuity between AV control unit connector M103 and suspect front door speaker connector.
3. Check continuity between AV control unit connector M103 and ground.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair or replace harness or connectors.
3.
CHECK FRONT DOOR SPEAKER SIGNAL
1. Connect AV control unit connector M103 and suspect front door speaker connector.
2. Turn ignition switch to ACC.
3. Push AV control unit POWER switch.
4. Check signal between the terminals of AV control unit connector M103.
AV control unit
Front door speaker
Continuity
Connector
Terminal
Connector
Terminal
M103
2
D10 (LH)
1
Yes
3
2
11
D110 (RH)
1
12
2
AV control unit
Ground
Continuity
Connector
Terminal
M103
2
—
No
3
11
12
AV control unit connector M103
Condition
Reference value
(+)
(
−)
Terminal
Terminal
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