Nissan X-Trail 32. Manual - part 1903

SN-68

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT PARK ASSIST]

B2725-12 REAR BUZZER

B2725-12 REAR BUZZER

DTC Description

INFOID:0000000010919356

DTC DETECTION LOGIC

POSSIBLE CAUSE

Harness between sonar control unit and buzzer (backward)

FAIL-SAFE

• Obstacle detection function is stopped
• Alarm display is displayed on the information display of combination meter

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait at least 30 seconds.

3.

Turn ignition switch ON and wait at least 30 seconds or more.

4.

Select “Self Diagnostic Result” mode of “SONAR” using CONSULT.

5.

Check DTC.

Is DTC “B2725-12” detected?

YES

>> Proceed to 

SN-68, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010919357

1.

CHECK BUZZER (BACKWARD) POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect sonar control unit connector and buzzer (backward) connector.

3.

Turn ignition switch ON.

4.

Check voltage between sonar control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK BUZZER DRIVE SIGNAL CIRCUIT

Check voltage between sonar control unit harness connector and ground.

DTC

Trouble diagnosis

(Trouble diagnosis contents)

Detection condition

B2725-12

REAR BUZZER
(Rear buzzer)

SHORT-BAT
(Short to battery)

A short circuit is detected in harness between sonar control unit and 
buzzer (backward) with an obstacle detected.

Sonar control unit

Ground

Reference value

(Approx.)

Connector

Terminal

B101

19

0 V

SN

B2725-12 REAR BUZZER

SN-69

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT PARK ASSIST]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

Is the inspection result normal?

YES

>> Replace buzzer (backward). Refer to 

SN-116, "REAR : Removal and Installation"

.

NO

>> Repair harness or connector.

Sonar control unit

Ground

Standard

Reference value

(Approx.)

Connector

Terminal

B101

20

—

NOTE:
• Voltage depends on volume.
• Cycle depends on distance between sensor 

and obstacle.

JSNIA5232GB

SN-70

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT PARK ASSIST]

B2725-14 REAR BUZZER

B2725-14 REAR BUZZER

DTC Description

INFOID:0000000010919358

DTC DETECTION LOGIC

POSSIBLE CAUSE

Harness between sonar control unit and buzzer (backward)

FAIL-SAFE

• Obstacle detection function is stopped
• Alarm display is displayed on the information display of combination meter

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait at least 30 seconds.

3.

Turn ignition switch ON and wait at least 30 seconds or more.

4.

Select “Self Diagnostic Result” mode of “SONAR” using CONSULT.

5.

Check DTC.

Is DTC “B2725-14” detected?

YES

>> Proceed to 

SN-70, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010919359

1.

CHECK CONTINUITY BUZZER (BACKWARD) POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect sonar control unit connector and buzzer (backward) connector.

3.

Check continuity between sonar control unit harness connector and buzzer (backward) harness connec-
tor.

4.

Check continuity between sonar control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK CONTINUITY BUZZER DRIVE SIGNAL CIRCUIT

DTC

Trouble diagnosis

(Trouble diagnosis contents)

Detection condition

B2725-14

REAR BUZZER
(Rear buzzer)

OPEN/SHORT-
GND
(Open/Short to 
ground)

A break in harness between sonar control unit and buzzer (back-
ward) or a short circuit between sonar control unit and ground is de-
tected when ignition switch is turned ON.

Sonar control unit

Buzzer (backward)

Continuity

Connector

Terminal

Connector

Terminal

B101

19

B66

2

Existed

Sonar control unit

Ground

Continuity

Connector

Terminal

B101

19

Not existed

SN

B2725-14 REAR BUZZER

SN-71

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT PARK ASSIST]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

1.

Check continuity between sonar control unit harness connector and buzzer (backward) harness connec-
tor.

2.

Check continuity between sonar control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK CONTINUITY SONAR CONTROL UNIT

1.

Check continuity between terminals of sonar control unit.

2.

Check continuity between sonar control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace buzzer (backward). Refer to 

SN-116, "REAR : Removal and Installation"

.

NO

>> Replace sonar control unit. Refer to 

SN-111, "Removal and Installation"

.

Sonar control unit

Buzzer (backward)

Continuity

Connector

Terminal

Connector

Terminal

B101

20

B66

3

Existed

Sonar control unit

Ground

Continuity

Connector

Terminal

B101

20

Not existed

Sonar control unit

Continuity.

Terminal

19

20

Not existed

Sonar control unit

Ground

Continuity

Terminal

19

Not existed

20