Nissan Pathfinder. Manual - part 180

AV

U175D WOOFER

AV-547

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U175D WOOFER

DTC Logic

INFOID:0000000009174758

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009174759

1.

PERFORM SELF DIAGNOSTIC RESULT

1. Perform Self Diagnostic Result for MULTI AV. 

2. Erase Self Diagnostic Result. Turn ignition switch OFF.

3. Turn ignition switch ON. Perform Self Diagnostic Result again.
Is DTC U175D detected?

YES

>> Refer to 

AV-573, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-49, "Intermittent Incident"

.

CONSULT Display

DTC Detection Condition

Possible Cause

R-LUGGAGE L-WOOFER 
(OPEN, SHORT, GND-
SHORT or VB-SHOR)
[U175D]

Sound signal circuit malfunction between BOSE 
speaker amp. and subwoofer.

Sound signal circuits between BOSE speaker 
amp. and subwoofer.
Refer to 

AV-573, "Diagnosis Procedure"

.

AV-548

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U176A, U1772 ROOF SPEAKER

U176A, U1772 ROOF SPEAKER

DTC Logic

INFOID:0000000009174760

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009174761

1.

PERFORM SELF DIAGNOSTIC RESULT

1. Perform Self Diagnostic Result for MULTI AV. 

2. Erase Self Diagnostic Result. Turn ignition switch OFF.

3. Turn ignition switch ON. Perform Self Diagnostic Result again.
Is DTC U176A or U1772 detected?

YES

>> Refer to 

AV-570, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-49, "Intermittent Incident"

.

CONSULT Display

DTC Detection Condition

Possible Cause

R-ROOF L-SQAWK 
(OPEN, SHORT, GND-
SHORT or VB-SHOR)
[U176A]

Sound signal circuit malfunction between BOSE 
speaker amp. and rear side speaker LH.

Sound signal circuits between BOSE speaker 
amp. and rear side speaker LH.
Refer to 

AV-570, "Diagnosis Procedure"

.

R-ROOF R-SQAWK 
(OPEN, SHORT, GND-
SHORT or VB-SHOR)
[U1772]

Sound signal circuit malfunction between BOSE 
speaker amp. and rear side speaker RH.

Sound signal circuits between BOSE speaker 
amp. and rear side speaker RH.
Refer to 

AV-570, "Diagnosis Procedure"

.

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-549

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POWER SUPPLY AND GROUND CIRCUIT

AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure

INFOID:0000000009174762

Regarding Wiring Diagram information, refer to 

AV-442, "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 M161 and M163.

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

1. Turn ignition switch OFF.

2. Check continuity between AV control unit connector M161 terminal 20 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

DISPLAY UNIT
DISPLAY UNIT : Diagnosis Procedure

INFOID:0000000009174763

Regarding Wiring Diagram information, refer to 

AV-442, "Wiring Diagram"

.

1.

CHECK FUSE

Check that the following fuses are not blown.

Terminal No.

Signal name

Fuse No.

68

Ignition signal

29 (5A)

19

Battery power supply

15 (15A)

AV control unit

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

M163

68

—

Ignition switch: ON

Battery voltage

M161

7

Ignition switch: ACC

19

Ignition switch: OFF

AV control unit

Ground

Continuity 

Connector

Terminal

M161

20

—

Yes

AV-550

< DTC/CIRCUIT DIAGNOSIS >

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POWER SUPPLY AND GROUND CIRCUIT

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 display unit connector.

3. Check voltage between display connector M92 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 display unit connector M92 terminal 12 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

BOSE AMP.
BOSE AMP. : Diagnosis Procedure

INFOID:0000000009174764

Regarding Wiring Diagram information, refer to 

AV-442, "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. Disconnect BOSE speaker amp. connector B129.

2. Check voltage between BOSE speaker amp. connector B129 and ground.

Terminal No.

Signal name

Fuse No.

11

Battery power supply

15 (15A)

23

ACC power supply

65 (10A)

Display unit

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

M92

23

—

Ignition switch: ACC

Battery voltage

11

Ignition switch: OFF

Display unit

Ground

Continuity 

Connector

Terminal

M92

12

—

Yes

Terminal No.

Signal name

Fuse No.

50

Battery power supply

11 (15A)

51

12 (15A)