Nissan Frontier. Manual — part 1306

WCS

METER BUZZER CIRCUIT

WCS-19

< DTC/CIRCUIT DIAGNOSIS >

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METER BUZZER CIRCUIT

Description

INFOID:0000000009477999

• 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

INFOID:0000000009478000

1.

CHECK OPERATION OF METER BUZZER

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

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

YES

>> Inspection End.

NO

>> Replace combination meter. Refer to

MWI-90, "Removal and Installation"

.

Diagnosis Procedure

INFOID:0000000009478001

1.

CHECK POWER SUPPLY OF COMBINATION METER

Check power supply of combination meter. Refer to

MWI-31, "COMBINATION METER : Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness.

WCS-20

< DTC/CIRCUIT DIAGNOSIS >

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

Description

INFOID:0000000009478002

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

Component Function Check

INFOID:0000000009478003

1.

CHECK COMBINATION METER INPUT SIGNAL

Select “DATA MONITOR” for “METER/M&A” and check the “SEAT BELT W/L” monitor value.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Refer to

WCS-20, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009478004

Regarding Wiring Diagram information, refer to

WCS-38, "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-90, "Removal and Installation"

.

NO

>> GO TO 2

2.

CHECK SEAT BELT BUCKLE SWITCH LH CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect combination meter connector and seat belt buckle switch LH connector.

3. Check continuity between combination meter harness connector M24 terminal 24 and seat belt buckle

switch LH harness connector B12 terminal 1.

4. Check continuity between combination meter harness connector M24 terminal 24 and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

CHECK SEAT BELT BUCKLE SWITCH LH GROUND CIRCUIT

Check continuity between seat belt buckle switch LH harness connector B12 terminal 2 and ground.

Is the inspection result normal?

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

24 - 1

: Continuity should exist.

24 - Ground

: Continuity should not exist.

2 - Ground

: Continuity should exist.

WCS

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

WCS-21

< DTC/CIRCUIT DIAGNOSIS >

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YES

>> Inspection End.

NO

>> Repair or replace harness.

Component Inspection

INFOID:0000000009478005

1.

CHECK SEAT BELT BUCKLE SWITCH LH

1. Turn ignition switch OFF.

2. Disconnect the seat belt buckle switch LH connector.

3. Check continuity between the seat belt buckle switch LH terminals 1 and 2.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace the seat belt buckle switch LH. Refer to

SE-32, "Removal and Installation"

.

1– 2
When seat belt is
fastened

: Continuity should not exist.

When seat belt is
unfastened

: Continuity should exist.

WCS-22

< DTC/CIRCUIT DIAGNOSIS >

KEY SWITCH SIGNAL CIRCUIT

KEY SWITCH SIGNAL CIRCUIT

Description

INFOID:0000000009478006

Transmits a key switch signal to the BCM.

Component Function Check

INFOID:0000000009478007

1.

CHECK BCM INPUT SIGNAL

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

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Refer to

WCS-22, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009478008

Regarding Wiring Diagram information, refer to

WCS-38, "Wiring Diagram"

.

1.

CHECK FUSE

Check if the key switch 10A fuse [No. 25, located in the fuse and fusible link 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 M18 terminal 37

and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 3

3.

CHECK KEY SWITCH CIRCUIT

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