Nissan Sentra. Manual - part 917

WCS

COMPONENT PARTS

WCS-5

< SYSTEM DESCRIPTION >

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Component Description

INFOID:0000000009759222

1.

Combination meter

2.

Combination switch (lighting and turn 
signal switch)

3.

Key switch (without intelligent key sys-
tem)

4.

Push-button ignition switch (with intel-
ligent key system)

5.

Seat belt buckle switch LH

6.

Front door switch LH

7.

BCM 
(view with instrument panel removed)

8.

ABS actuator and electric unit (control 
unit)

9.

Parking brake switch
 (view with center console removed)

Unit

Description

Combination meter

• Judges whether the parking brake is released using the vehicle speed signal and the parking 

brake switch signal, and sounds the buzzer if necessary. 

• Receives the seat belt buckle switch signal from the seat belt buckle switch and transmits it to 

BCM with CAN communication line.

• Receives a buzzer output signal from BCM with CAN communication line.

Lighting switch

Transmits lighting switch status signal to the BCM.

BCM

Transmits signals provided by various units to the combination meter with CAN communication line.

Front door switch LH

Transmits door switch signal to BCM.

Key switch

Transmits key switch signal to BCM.

Push-button ignition switch

Provides ignition switch status to the BCM

Seat belt buckle switch LH

Transmits seat belt buckle switch LH signal to the combination meter.

Parking brake switch

Transmits parking brake switch signal to the combination meter.

ABS actuator and electric unit 
(control unit)

Transmits the vehicle speed signal to combination meter with CAN communication line.

WCS-6

< SYSTEM DESCRIPTION >

SYSTEM

SYSTEM

WARNING CHIME SYSTEM
WARNING CHIME SYSTEM : System Diagram

INFOID:0000000009759223

WARNING CHIME SYSTEM : System Description

INFOID:0000000009759224

DESCRIPTION

• The buzzer for warning chime system is installed in the combination meter.

• The buzzer sounds when the combination meter receives a buzzer output signal from the BCM.

• The BCM receives signals from various units and transmits a buzzer output signal to the combination meter

with CAN communication line if it judges that the warning buzzer should be activated.

LIGHT REMINDER WARNING CHIME
LIGHT REMINDER WARNING CHIME : System Diagram

INFOID:0000000009759225

LIGHT REMINDER WARNING CHIME : System Description

INFOID:0000000009759226

DESCRIPTION

With ignition switch in OFF or ACC position, driver door open, and lighting switch in parking lamp or headlamp

position, the light warning chime will sound. 

• BCM detects ignition switch in OFF or ACC position, front door switch LH ON, and lighting switch in parking

lamp or headlamp position, and then transmits buzzer output signal (light reminder warning chime) to combi-

nation meter with CAN communication line.

• When combination meter receives buzzer output signal (light reminder warning chime), it sounds the buzzer.

WARNING OPERATION CONDITIONS

If all of the following conditions are fulfilled

• Lighting switch is in parking lamp or headlamp position

• Ignition switch is in OFF or ACC

• Front door switch LH is ON

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WCS

SYSTEM

WCS-7

< SYSTEM DESCRIPTION >

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WARNING CANCEL CONDITIONS

Warning is canceled if any of the following conditions is fulfilled.

• Lighting switch OFF

• Ignition switch ON

• Front door switch LH is OFF

SEAT BELT WARNING CHIME
SEAT BELT WARNING CHIME : System Diagram

INFOID:0000000009759227

SEAT BELT WARNING CHIME : System Description

INFOID:0000000009759228

DESCRIPTION

With ignition switch turned ON and driver seat belt unfastened, seat belt warning chime will sound for approxi-

mately 6 seconds.

• BCM receives seat belt buckle switch signal from combination meter with CAN communication line.

• BCM detects ignition switch turned ON and seat belt buckle switch LH ON, and then transmits buzzer output

signal (seat belt warning chime) to combination meter with CAN communication line.

• When combination meter receives buzzer output signal (seat belt warning chime), it sounds the buzzer.

WARNING OPERATION CONDITIONS

If all of the following conditions are fulfilled

• Ignition switch OFF

→ON

• Seat belt buckle switch LH is ON (driver seat belt not fastened)

WARNING CANCEL CONDITIONS

Cancels the warning if any of the following conditions is fulfilled.

• Ignition switch OFF

• Seat belt buckle switch LH is OFF (driver seat belt fastened)

KEY WARNING CHIME (WITHOUT INTELLIGENT KEY)
KEY WARNING CHIME (WITHOUT INTELLIGENT KEY) : System Diagram

INFOID:0000000009759229

KEY WARNING CHIME (WITHOUT INTELLIGENT KEY) : System Description

INFOID:0000000009759230

With the key inserted into the key switch, and the ignition switch in the OFF or ACC position, when driver's

door is opened, the warning chime will sound.

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WCS-8

< SYSTEM DESCRIPTION >

SYSTEM

• BCM detects key inserted into the ignition switch, and sends key warning signal to combination meter with

CAN communication line. 

• When combination meter receives key warning signal, it sounds warning chime.

PARKING BRAKE RELEASE WARNING CHIME
PARKING BRAKE RELEASE WARNING CHIME : System Diagram

INFOID:0000000009759231

PARKING BRAKE RELEASE WARNING CHIME : System Description

INFOID:0000000009759232

DESCRIPTION

• The combination meter receives the vehicle speed signal from the ABS actuator and electric unit (control

unit) via CAN communication line.

• The combination meter judges whether the parking brake is released using the parking brake switch signal

from the parking brake switch, and sounds the warning buzzer if necessary.

WARNING OPERATION CONDITIONS

If all of the following conditions are fulfilled:

• Vehicle speed is approximately 7 km/h (4.3 MPH) or higher

• Parking brake switch ON

WARNING CANCEL CONDITIONS

Warning is canceled if any of the following conditions are fulfilled:

• Vehicle speed is approximately 3 km/h (1.9 MPH) or less

• Parking brake switch OFF

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