Infiniti FX35, FX50 (S51). Manual - part 1896

WCS-4

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

Are self-diagnosis results normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

NARROW DOWN MALFUNCTIONING PARTS BY SYMPTOM DIAGNOSIS

Perform symptom diagnosis and narrow down the malfunctioning parts.

>> GO TO 5.

5.

REPAIR OR REPLACE MALFUNCTIONING PARTS

Repair or replace malfunctioning parts.
NOTE:
If DTC is displayed, erase DTC after repair or replace malfunctioning parts.

>> GO TO 6.

6.

FINAL CHECK

Check that the warning buzzer in the combination meter operates normally.

Does it operate normally?

YES

>> INSPECTION END

NO

>> GO TO 1.

WCS

WARNING CHIME SYSTEM

WCS-5

< SYSTEM DESCRIPTION >

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SYSTEM DESCRIPTION

WARNING CHIME SYSTEM

WARNING CHIME SYSTEM

WARNING CHIME SYSTEM : System Diagram

INFOID:0000000005524699

WARNING CHIME SYSTEM : System Description

INFOID:0000000005524700

COMBINATION METER

• The buzzer (1) for warning chime system is installed in the combi-

nation meter.

• The buzzer sounds when the combination meter receives buzzer

output signal from each unit through unified meter and A/C amp.

UNIFIED METER AND A/C AMP.

The unified meter and A/C amp. transmits the buzzer output signal received from BCM with CAN communica-
tion line to the combination meter.

BCM

BCM receives signals from various units and transmits a buzzer output signal to the unified meter and A/C
amp. with CAN communication line if it judges that the warning buzzer should be activated.

BCM warning function list

JSNIA0500GB

JPNIA0764ZZ

Warning functions

Signal name

Light reminder warning chime

• Lighting switch position signal
• Door switch signal

Seat belt warning chime

Seat belt buckle switch signal

WCS-6

< SYSTEM DESCRIPTION >

WARNING CHIME SYSTEM

WARNING CHIME SYSTEM : Component Parts Location

INFOID:0000000005524701

WARNING CHIME SYSTEM : Component Description

INFOID:0000000005524702

1.

BCM

2.

ABS actuator and electric unit (con-
trol unit)

3.

Unified meter and A/C amp.

4.

Front door switch (driver side)

5.

Combination switch
(Lighting switch)

6.

Parking brake switch

7.

Seat belt buckle switch (driver side)

8.

Combination meter

A.

Dash side lower (passenger side)

B.

Hoodledge cover (LH)

C.

Behind cluster lid C

JPNIA1105ZZ

Unit

Description

Combination meter

• Receives a buzzer output signal from the unified meter and A/C amp. and sounds the buzzer.
• Judges whether the parking brake is released from the vehicle speed signal received from the 

unified meter and A/C amp. with CAN communication line and the parking brake switch signal 
from the parking brake switch, and sounds the buzzer if necessary. 

Unified meter and A/C amp.

• 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 and transmits it to 

the combination meter by means of communication line.

BCM

Transmits signals provided by various units and switches to the unified meter and A/C amp. with 
CAN communication line.

ABS actuator and electric unit 
(control unit)

Transmits the vehicle speed signal to unified meter and A/C amp. with CAN communication line.

Seat belt buckle switch (driver 
side)

Transmits the seat belt buckle switch signal to the unified meter and A/C amp.

WCS

WARNING CHIME SYSTEM

WCS-7

< SYSTEM DESCRIPTION >

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LIGHT REMINDER WARNING CHIME

LIGHT REMINDER WARNING CHIME : System Diagram

INFOID:0000000005524703

LIGHT REMINDER WARNING CHIME : System Description

INFOID:0000000005524704

DESCRIPTION

With ignition switch in OFF or ACC position, driver door open, and lighting switch in 1ST or 2ND position, the
light reminder warning chime will sound. 
• BCM detects ignition switch in OFF or ACC position, front door switch (driver side) ON, and lighting switch in

1ST or 2ND position. And then transmits buzzer output signal (light reminder warning chime) to unified meter
and A/C amp. with CAN communication line.

• Unified meter and A/C amp. transmits buzzer output signal (light reminder warning chime) to combination

meter with 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 (driver side) 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 (driver side) is OFF

Combination switch
(Lighting switch)

Transmits the lighting switch position signal to BCM.

Front door switch
(driver side)

Transmits the door switch signal to BCM.

Parking brake switch

Transmits the parking brake switch signal to the combination meter.

Unit

Description

JSNIA0167GB