Nissan Frontier D40. Manual - part 1128

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< FUNCTION DIAGNOSIS >

WARNING CHIME SYSTEM

FUNCTION DIAGNOSIS

WARNING CHIME SYSTEM

WARNING CHIME SYSTEM

WARNING CHIME SYSTEM : System Diagram

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WARNING CHIME SYSTEM : System Description

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COMBINATION METER

• 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 each unit.

BCM

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.

BCM warning function list

AWNIA0645GB

Warning functions

Signal name

Light reminder warning chime

• Lighting switch position signal
• Door switch signal

Seat belt warning chime

Seat belt buckle switch signal

Key warning chime

• Key switch signal
• Door switch signal

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WARNING CHIME SYSTEM

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< FUNCTION DIAGNOSIS >

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WARNING CHIME SYSTEM : Component Parts Location

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WARNING CHIME SYSTEM : Component Description

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LIGHT REMINDER WARNING CHIME

WKIA4988E

1.

Combination switch (lighting 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 the seat belt buckle switch signal from the seat belt buckle switch LH and transmits 

it to BCM with CAN communication line.

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

BCM

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

Key switch 

Transmits key switch signal to BCM.

Seat belt buckle switch LH

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

Combination switch
(Lighting switch)

Transmits the lighting switch position signal to BCM.

Front door switch LH

Transmits the door switch signal to BCM.

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< FUNCTION DIAGNOSIS >

WARNING CHIME SYSTEM

LIGHT REMINDER WARNING CHIME : System Diagram

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LIGHT REMINDER WARNING CHIME : System Description

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DESCRIPTION

With ignition switch in OFF or ACC position, driver door open, and lighting switch in 1ST or 2ND 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 1ST or

2ND position. And then transmits buzzer output signal (light reminder warning chime) to combination 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 at 1st or 2nd position
• Ignition switch is at OFF or ACC
• Front door switch LH is ON

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

WKIA5465E

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WARNING CHIME SYSTEM

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< FUNCTION DIAGNOSIS >

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LIGHT REMINDER WARNING CHIME : Component Parts Location

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LIGHT REMINDER WARNING CHIME : Component Description

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SEAT BELT WARNING CHIME

SEAT BELT WARNING CHIME : System Diagram

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WKIA4988E

1.

Combination switch (lighting 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 switch)

Transmits the lighting switch position signal to BCM.

Front door switch LH

Transmits the door switch signal to BCM.

LKIA0878E