Nissan Murano Z51. Manual - part 60

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-19

< DTC/CIRCUIT DIAGNOSIS >

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DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

AUDIO UNIT

AUDIO UNIT : Diagnosis Procedure

INFOID:0000000005528417

1.

CHECK FUSE

Check for blown fuses.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Be sure to eliminate the cause of malfunction before installing new fuse. 

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between audio unit harness connectors and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Check harness between audio unit and fuse.

Power source

Fuse No.

Battery

35

Ignition switch ACC or ON

19

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Battery power supply

M46

19

OFF

Battery voltage

ACC power supply

7

ACC

AV-20

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

STEERING SWITCH SIGNAL A CIRCUIT

STEERING SWITCH SIGNAL A CIRCUIT

Description

INFOID:0000000005528418

Transmits the steering switch signal to audio unit.

Diagnosis Procedure

INFOID:0000000005528419

1.

CHECK STEERING SWITCH SIGNAL A CIRCUIT

1.

Disconnect audio unit connector and spiral cable connector. 

2.

Check continuity between audio unit harness connector and spiral cable harness connector.

3.

Check continuity between audio unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK SPIRAL CABLE

Check spiral cable. 
Is the inspection result normal?

YES

>> GO TO 3. 

NO

>> Replace spiral cable.

3.

CHECK AUDIO UNIT VOLTAGE

1.

Connect audio unit connector and spiral cable connector.

2.

Turn ignition switch ON.

3.

Check voltage between audio unit harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace audio unit.

4.

CHECK STEERING SWITCH

1.

Turn ignition switch OFF.

2.

Check steering switch. Refer to 

AV-21, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace steering switch.

Audio unit

Spiral cable

Continuity

Connector

Terminal

Connector

Terminal

M46

6

M33

24

Existed

Audio unit

—

Continuity

Connector

Terminal

M46

6

Ground

Not existed

(+)

(

−

)

Voltage

Audio unit

Connector

Terminal

Connector

Terminal

M46

6

M46

15

Approx 5.0 V

AV

STEERING SWITCH SIGNAL A CIRCUIT

AV-21

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

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Component Inspection

INFOID:0000000005528420

Measure the resistance between the steering switch connector ter-
minals.

Standard

JSNIA1145GB

Steering switch

Condition

Resistance 

Ω

Con-

nector

Termi-

nals

Con-

nector

Termi-

nal

M303

14

M303

17

SEEK DOWN switch 
ON

315 – 327

SEEK UP switch ON

119 – 123

SOURCE switch ON

0

15

VOL UP switch ON

119 – 123

VOL DOWN switch ON

0

AV-22

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

STEERING SWITCH SIGNAL B CIRCUIT

STEERING SWITCH SIGNAL B CIRCUIT

Description

INFOID:0000000005528421

Transmits the steering switch signal to audio unit.

Diagnosis Procedure

INFOID:0000000005528422

1.

CHECK STEERING SWITCH SIGNAL B CIRCUIT

1.

Disconnect audio unit connector and spiral cable connector. 

2.

Check continuity between audio unit harness connector and spiral cable harness connector.

3.

Check continuity between audio unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK SPIRAL CABLE

Check spiral cable. 
Is the inspection result normal?

YES

>> GO TO 3. 

NO

>> Replace spiral cable.

3.

CHECK AUDIO UNIT VOLTAGE

1.

Connect audio unit connector and spiral cable connector.

2.

Turn ignition switch ON.

3.

Check voltage between audio unit harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace audio unit.

4.

CHECK STEERING SWITCH

1.

Turn ignition switch OFF.

2.

Check steering switch. Refer to 

AV-23, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace steering switch.

Audio unit

Spiral cable

Continuity

Connector

Terminal

Connector

Terminal

M46

16

M33

31

Existed

Audio unit

—

Continuity

Connector

Terminal

M46

16

Ground

Not existed

(+)

(

−

)

Voltage

Audio unit

Connector

Terminal

Connector

Terminal

M46

16

M46

15

Approx 5.0 V