Nissan Sentra. Manual - part 923

WCS

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

WCS-29

< DTC/CIRCUIT DIAGNOSIS >

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SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

Description

INFOID:0000000009759247

Transmits a seat belt buckle switch LH (driver seat) signal to the combination meter.

Component Function Check

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1.

 CHECK COMBINATION METER INPUT SIGNAL

Select DATA MONITOR for METER/M&A and check the BUCKLE SW monitor value.

YES

>> Inspection End.

NO

>> Refer to 

WCS-29, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009759249

Regarding Wiring Diagram information, refer to 

WCS-17, "Wiring Diagram"

.

1.

CHECK COMBINATION METER INPUT SIGNAL

1. Turn ignition switch ON.

2. Check voltage between combination meter harness connector M24 terminal 9 and ground.

Is the inspection result normal?

YES

>> Replace combination meter. Refer to 

MWI-77, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK SEAT BELT BUCKLE SWITCH CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect combination meter harness connector M24 and seat belt buckle switch LH (driver seat) har-

ness connector B16.

3. Check continuity between combination meter harness connector M24 terminal 9 and seat belt buckle

switch LH (driver seat) harness connector B16 terminal 1.

4. Check continuity between combination meter harness connector M24  terminal 9 and ground.

Is the inspection result normal?

Monitor Item

Condition

Status

BUCKLE SW

When seat belt LH (driver seat) is fastened

OFF

When seat belt LH (driver seat) is unfastened

ON

Combination meter

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

M24

9

—

When driver seat belt is fastened

12 V

When driver seat belt is unfastened

0 V

Combination meter

Seat belt buckle switch LH (driver seat)

Continuity

Connector

Terminal

Connector

Terminal

M24

9

B16

1

Yes

Combination meter

Ground

Continuity

Connector

Terminal

M24

9

—

No

WCS-30

< DTC/CIRCUIT DIAGNOSIS >

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

YES

>> GO TO 3.

NO

>> Repair or replace harness or connector.

3.

CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT

Check continuity between seat belt buckle switch LH (driver seat) harness connector B16 terminal 2 and

ground.

Is the inspection result normal?

YES

>> Check the seat belt buckle switch. Refer to 

WCS-30, "Component Inspection"

.

NO

>> Repair or replace harness or connector.

Component Inspection

INFOID:0000000009759250

1.

 CHECK SEAT BELT BUCKLE SWITCH

1. Turn ignition switch OFF.

2. Disconnect the seat belt buckle switch LH (driver seat).

3. Check continuity between the seat belt buckle switch LH (driver seat) terminals 1 and 2.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace the seat belt buckle switch LH (driver seat). Refer to 

SR-32, "Removal and Installation"

.

Seat belt buckle switch LH (driver seat)

Ground

Continuity

Connector

Terminal

B16

2

—

Yes

Terminal

Condition

Continuity

1

2

When seat belt is fastened

No

When seat belt is unfastened

Yes

WCS

WARNING CHIME SYSTEM SYMPTOMS

WCS-31

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

WARNING CHIME SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000009759251

CAUTION:

Perform the self-diagnosis with CONSULT before the symptom diagnosis. Perform the trouble diagno-

sis if any DTC is detected.

Symptom

Possible cause

Reference

The light reminder warning does not sound.

• Harness between BCM and front door 

switch LH

• Front door switch LH
• BCM
• Combination meter

Refer to 

WCS-34

.

The parking brake release warning continues sounding or 
does not sound.

• Harness between combination meter and 

parking brake switch

• Parking brake switch
• BCM
• Combination meter

Refer to 

WCS-32

.

The seat belt warning continues sounding or does not sound.

• Harness between combination meter and 

seat belt buckle switch  (LH)

• Seat belt  buckle switch (LH)
• BCM
• Combination meter

Refer to 

WCS-33

.

The key warning does not sound.
(without Intelligent Key)

• Harness between BCM and key switch 
• Key switch
• BCM

Refer to 

WCS-35

.

Warning chime does not sound at all.

• BCM
• Combination meter

Refer to 

WCS-28

.

WCS-32

< SYMPTOM DIAGNOSIS >

THE PARKING BRAKE RELEASE WARNING CONTINUES SOUNDING, OR 

DOES NOT SOUND

THE PARKING BRAKE RELEASE WARNING CONTINUES SOUNDING, OR
DOES NOT SOUND

Description

INFOID:0000000009759252

• The parking brake warning buzzer sounds continuously during vehicle travel though the parking brake is

released.

• The parking brake warning buzzer does not sound at all even though driving the vehicle with the parking

brake applied.

Diagnosis Procedure

INFOID:0000000009759253

1.

CHECK PARKING BRAKE WARNING LAMP

1. Start the engine.

2. Check the operation of the brake warning lamp by operating the parking brake.

Is the inspection result normal?

YES

>> Replace combination meter. Refer to 

MWI-77, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK PARKING BRAKE SWITCH SIGNAL CIRCUIT

Check the parking brake switch signal circuit. Refer to 

MWI-60, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connector.

3.

CHECK PARKING BRAKE SWITCH

Check the parking brake switch. Refer to 

MWI-61, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace combination meter. Refer to 

MWI-77, "Removal and Installation"

.

NO

>> Replace parking brake switch. Refer to 

PB-7, "Exploded View"

.

Combination meter

Condition

Status

Brake warning lamp

When parking brake is applied

ON

When parking brake is released

OFF