Nissan Xterra. Instruction — part 45
AV-172
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION]
U12B0 POWER SUPPLY VOLTAGE
U12B0 POWER SUPPLY VOLTAGE
DTC Logic
INFOID:0000000009485296
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009485297
1.
CHECK CHARGING SYSTEM
Check the vehicle charging system. Refer to
CHG-2, "Work Flow (With EXP-800 NI or GR8-1200 NI)"
5, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace the malfunctioning components.
2.
CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUITS
Perform the AV control unit power supply and ground circuit diagnosis procedure. Refer to
TROL UNIT : Diagnosis Procedure"
Is the inspection result normal?
YES
>> Replace the AV control unit. Refer to
AV-218, "Removal and Installation"
.
NO
>> Repair or replace harness or connectors.
CONSULT Display
DTC Detection Condition
Possible Cause
Supply Voltage Goes below 9V
> 20s
[U12B0]
AV control unit supply voltage exceeds lower lim-
its.
• Charging system malfunction.
• AV control unit power supply or ground circuits.
AV
U12B1 POWER SUPPLY VOLTAGE
AV-173
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U12B1 POWER SUPPLY VOLTAGE
DTC Logic
INFOID:0000000009485298
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009485299
1.
CHECK CHARGING SYSTEM
Check the vehicle charging system. Refer to
CHG-2, "Work Flow (With EXP-800 NI or GR8-1200 NI)"
5, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"
.
Is the inspection result normal?
YES
>> Replace the AV control unit. Refer to
AV-218, "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-174
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION]
U1310 AV CONTROL UNIT
U1310 AV CONTROL UNIT
DTC Logic
INFOID:0000000009485300
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
POWER SUPPLY AND GROUND CIRCUIT
AV-175
< DTC/CIRCUIT DIAGNOSIS >
[NAVIGATION]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
POWER SUPPLY AND GROUND CIRCUIT
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure
INFOID:0000000009485301
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 connector M96 and M97.
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
Check continuity between AV control unit connector M96 and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace harness or connectors.
AUDIO AMP.
AUDIO AMP. : Diagnosis Procedure
INFOID:0000000009485302
Regarding Wiring Diagram information, refer to
.
1.
CHECK FUSE
Check that the following fuse is not blown.
Terminal No.
Signal name
Fuse No.
7
ACC power supply
4 (10A)
19
Battery power supply
29 (20A)
37
IGN power supply
12 (10A)
AV control unit
Ground
Condition
Voltage
(Approx.)
Connector
Terminal
M96
19
—
Ignition switch: OFF
Battery voltage
7
Ignition switch: ON
M97
37
AV control unit
Ground
Continuity
Connector
Terminal
M96
20
—
Yes
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