Nissan Frontier. Manual - part 1303

WCS

WARNING CHIME SYSTEM

WCS-7

< SYSTEM DESCRIPTION >

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LIGHT REMINDER WARNING CHIME : Component Parts Location

INFOID:0000000009477983

LIGHT REMINDER WARNING CHIME : Component Description

INFOID:0000000009477984

SEAT BELT WARNING CHIME
SEAT BELT WARNING CHIME : System Diagram

INFOID:0000000009477985

WKIA4988E

1.

Combination switch (lighting and turn 
signal switch) M28

2.

Combination meter M24

3.

Key switch M27 

4.

BCM M18, M19, M20 (view with instru-
ment lower panel LH removed)

5.

Front door switch LH B8 (crew cab)

6.

Front door switch LH D213 (king cab)

7.

Seat belt buckle switch LH B12

Unit

Description

Combination meter

Receives a buzzer output signal from BCM via CAN communication line and sounds the buzzer.

BCM

Judges the light warning conditions from the signals provided by various switches and transmits a 
buzzer output signal to the combination meter via CAN communication line if necessary.

Combination switch
(lighting and turn signal switch)

Transmits the lighting switch position signal to BCM.

Front door switch LH

Transmits the door switch signal to BCM.

AWNIA2678GB

WCS-8

< SYSTEM DESCRIPTION >

WARNING CHIME SYSTEM

SEAT BELT WARNING CHIME : System Description

INFOID:0000000009477986

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 LH 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)

SEAT BELT WARNING CHIME : Component Parts Location

INFOID:0000000009477987

WKIA4988E

1.

Combination switch (lighting and turn 
signal switch) M28

2.

Combination meter M24

3.

Key switch M27 

4.

BCM M18, M19, M20 (view with instru-
ment lower panel LH removed)

5.

Front door switch LH B8 (crew cab)

6.

Front door switch LH D213 (king cab)

7.

Seat belt buckle switch LH B12

WCS

WARNING CHIME SYSTEM

WCS-9

< SYSTEM DESCRIPTION >

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SEAT BELT WARNING CHIME : Component Description

INFOID:0000000009477988

KEY WARNING CHIME
KEY WARNING CHIME : System Diagram

INFOID:0000000009477989

KEY WARNING CHIME : System Description

INFOID:0000000009477990

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.

• 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.

Unit

Description

Combination meter

• Receives the seat belt buckle switch LH signal from the seat belt buckle switch LH and transmits 

it to BCM via CAN communication line.

• Receives a buzzer output signal from BCM via CAN communication line and sounds the buzzer.

BCM

Judges the seat belt warning condition from the seat belt buckle switch LH signal received from the 
combination meter and transmits a buzzer output signal to the combination meter via CAN commu-
nication line if necessary.

Seat belt buckle switch LH

Transmits seat belt buckle switch LH signal to combination meter.

WKIA5463E

WCS-10

< SYSTEM DESCRIPTION >

WARNING CHIME SYSTEM

KEY WARNING CHIME : Component Parts Location

INFOID:0000000009477991

KEY WARNING CHIME : Component Description

INFOID:0000000009477992

WKIA4988E

1.

Combination switch (lighting and turn 
signal switch) M28

2.

Combination meter M24

3.

Key switch M27 

4.

BCM M18, M19, M20 (view with instru-
ment lower panel LH removed)

5.

Front door switch LH B8 (crew cab)

6.

Front door switch LH D213 (king cab)

7.

Seat belt buckle switch LH B12

Unit

Description

Combination meter

Receives key warning signal from BCM via CAN communication line and sounds the buzzer.

BCM

Judges the key warning condition from the door switch signal received from the front door switch 
LH, and the key switch signal received from the key switch. It then transmits a buzzer output signal 
to the combination meter via CAN communication line if necessary.

Front door switch LH

Transmits door switch signal to BCM.

Key switch

Transmits key switch signal to BCM.