Nissan Frontier. Instruction — part 78

AV-304

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

U1310 AV CONTROL UNIT

U1310 AV CONTROL UNIT

DTC Logic

INFOID:0000000009482230

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-348, "Removal and Installation"

.

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-305

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

C

D

E

F

G

H

I

J

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M

B

A

O

P

POWER SUPPLY AND GROUND CIRCUIT

AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure

INFOID:0000000009482231

Regarding Wiring Diagram information, refer to

AV-264, "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 audio unit connector M96 and M97.

3. Check voltage between audio 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 audio 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:0000000009482232

Regarding Wiring Diagram information, refer to

AV-264, "Wiring Diagram"

.

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)

Audio unit

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

M96

19

—

Ignition switch: OFF

Battery voltage

7

Ignition switch: ON

M97

37

Audio unit

Ground

Continuity

Connector

Terminal

M96

20

—

Yes

AV-306

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

POWER SUPPLY AND GROUND CIRCUIT

Is the fuse 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 audio amplifier connector B158.

3. Check voltage between audio amplifier connector B158 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 audio amplifier connector B158 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

Terminal No.

Signal name

Fuse No.

1

Battery power supply

17 (15A)

17

Audio amplifier

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

B158

1

—

Ignition switch: OFF

Battery voltage

17

Audio amplifier

Ground

Continuity

Connector

Terminal

B158

4

—

Yes

20

AV

FRONT DOOR SPEAKER

AV-307

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

FRONT DOOR SPEAKER

Diagnosis Procedure

INFOID:0000000009482233

Regarding Wiring Diagram information, refer to

AV-264, "Wiring Diagram"

.

1.

CONNECTOR CHECK

Check the AV control unit, audio amplifier 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 audio amplifier connector B159 and suspect front door speaker connector.

2. Check continuity between audio amplifier connector B159 and suspect front door speaker connector.

3. Check continuity between audio amplifier connector B159 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 audio amplifier connector B159 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 audio amplifier connector B159.

Audio amplifier

Front door speaker

Continuity

Connector

Terminal

Connector

Terminal

B159

15

D12 (LH)

1

Yes

31

2

16

D112 (RH)

1

32

2

Audio amplifier

Ground

Continuity

Connector

Terminal

B159

15

—

No

31

16

32

Audio amplifier connector B159

Condition

Reference value

(+)

(

−)

Terminal

Terminal