Infiniti QX56 (JA60). Manual - part 1005

WCS-18

< COMPONENT DIAGNOSIS >

METER BUZZER CIRCUIT

METER BUZZER CIRCUIT

Description

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

• The combination meter sounds the alarm buzzer based on the signals transmitted from various units.

Component Function Check

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1.

CHECK OPERATION OF METER BUZZER

1. Select “BUZZER” of “BCM” on CONSULT-III.

2. Perform “LIGHT WARN ALM” of “ACTIVE TEST”.
Does meter buzzer activate?

YES

>> Inspection End.

NO

>> Replace combination meter. Refer to 

MWI-100, "Removal and Installation"

.

Diagnosis Procedure

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1.

CHECK POWER SUPPLY OF COMBINATION METER

Check power supply of combination meter. Refer to 

MWI-28, "COMBINATION METER : Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair power supply circuit of combination meter.

WCS

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

WCS-19

< COMPONENT DIAGNOSIS >

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SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

Description

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Transmits a seat belt buckle switch 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 “SEAT BELT W/L” monitor value.

>> Inspection End.

Diagnosis Procedure

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Regarding Wiring Diagram information, refer to 

WCS-23, "Wiring Diagram"

.

1.

CHECK COMBINATION METER INPUT SIGNAL

1. Turn ignition switch ON.

2. Check voltage between combination meter harness connector

M24 terminal 24 and ground.

Is the inspection result normal?

YES

>> Replace combination meter. Refer to 

MWI-100,

"Removal and Installation"

.

NO

>> GO TO 2

2.

CHECK SEAT BELT BUCKLE SWITCH CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect combination meter connector and seat belt buckle

pre-tensioner assembly LH (seat belt buckle switch) connector.

3. Check continuity between combination meter harness connector

M24 (B) terminal 24 and seat belt buckle pre-tensioner assem-

bly LH (seat belt buckle switch) harness connector B74 (A) ter-

minal 4.

4. Check continuity between combination meter harness connector

M24 (B) terminal 24 and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair harness or connector.

3.

CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT

SEAT BELT W/L
When seat belt is fastened

: OFF

When seat belt is unfastened : ON

24 - Ground
When driver seat belt is fastened

: Approx. 12V

When driver seat belt is unfastened : Approx. 0V

AWNIA0212ZZ

24 - 4

: Continuity should exist.

24 - Ground

: Continuity should not exist.

AWNIA0213ZZ

WCS-20

< COMPONENT DIAGNOSIS >

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

Check continuity between seat belt buckle pre-tensioner assembly

LH (seat belt buckle switch) harness connector B74 terminal 3 and

ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair harness or connector.

Component Inspection

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1.

CHECK SEAT BELT BUCKLE SWITCH

1. Turn ignition switch OFF.

2. Disconnect the seat belt buckle pre-tensioner assembly LH

(seat belt buckle switch) connector.

3. Check continuity between terminals 3 and 4.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace the seat belt buckle pre-tensioner assembly LH (seat belt buckle switch).

3 - Ground

: Continuity should exist.

AWNIA0288ZZ

3– 4
When seat belt is 
fastened

: Continuity should not exist.

When seat belt is 
unfastened

: Continuity should exist.

AWNIA0289ZZ

WCS

KEY SWITCH SIGNAL CIRCUIT

WCS-21

< COMPONENT DIAGNOSIS >

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KEY SWITCH SIGNAL CIRCUIT

Description

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Transmits a key switch signal to the BCM.

Component Function Check

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1.

CHECK BCM INPUT SIGNAL

Select “DATA MONITOR” for “BCM” and check the “KEY ON SW” monitor value.

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005146164

Regarding Wiring Diagram information, refer to 

WCS-23, "Wiring Diagram"

.

1.

CHECK FUSE

Check if the key switch and ignition knob switch 10A fuse (No. 62, located in the fuse and relay box) is blown.
Is the fuse blown?

YES

>> Be sure to repair the cause of malfunction before installing new fuse.

NO

>> GO TO 2

2.

CHECK BCM INPUT SIGNAL

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 3

3.

CHECK KEY SWITCH CIRCUIT 

1. Disconnect BCM and key switch and ignition knob switch con-

nectors.

2. Check continuity between BCM harness connector M18 and key

switch and ignition knob switch harness connector M12.

3. Check continuity between BCM harness connector M18 and

ground.

KEY ON SW
When key is inserted into key cylinder

: ON

When key is removed from key cylinder : OFF

Terminals

Condition

Voltage

(Approx.)

(+)

(

−)

BCM

connector

Terminal

M18

37

Ground

Key is inserted

Battery voltage

Key is removed

0

PKIC0721E

A

B

Continuity

Connector

Terminal

Connector

Terminal

M18

37

M12

4

Yes

AWNIA0159ZZ