Nissan Sentra. Manual - part 94

AV-368

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION WITH BOSE]

U12B1 POWER SUPPLY VOLTAGE

U12B1 POWER SUPPLY VOLTAGE

DTC Logic

INFOID:0000000009759047

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009759048

1.

CHECK CHARGING SYSTEM

Check the vehicle charging system. Refer to 

CHG-14, "Work Flow (With EXP-800 NI or GR8-1200 NI)"

 or

CHG-17, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"

.

Is the inspection result normal?

YES

>> Replace the AV control unit. Refer to 

AV-406, "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-369

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION WITH BOSE]

C

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U1310 AV CONTROL UNIT

DTC Logic

INFOID:0000000009759049

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-406, "Removal and Installation"

.

AV-370

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION WITH BOSE]

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure

INFOID:0000000009759050

Regarding Wiring Diagram information, refer to 

AV-331, "Wiring Diagram"

.

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 M100 and M101.

3. Check voltage between AV control unit connectors M100 and M101 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 M100 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

BOSE SPEAKER AMP
BOSE SPEAKER AMP : Diagnosis Procedure

INFOID:0000000009759051

Regarding Wiring Diagram information, refer to 

AV-331, "Wiring Diagram"

.

1.

CHECK FUSE

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

M100

19

—

Ignition switch: OFF

Battery voltage

7

Ignition switch: ON

M101

37

AV control unit

Ground

Continuity 

Connector

Terminal

M100

20

—

Yes

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-371

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION WITH BOSE]

C

D

E

F

G

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B

A

O

P

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 Bose speaker amp. connector B44.

3. Check voltage between Bose speaker amp. connector B44 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. Disconnect Bose speaker amp. connector B44.

3. Check continuity between Bose speaker amp. connector B44 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

Terminal No.

Signal name

Fuse No.

27

Battery power supply

23 (15A)

28

24 (15A)

Bose speaker amp.

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

B44

27

—

Ignition switch: OFF

Battery voltage

28

Bose speaker amp.

Ground

Continuity 

Connector

Terminal

B44

26

—

Yes

31