Nissan Quest E52. Manual - part 1252

WCS-38

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

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 repairing or replacing 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

POWER SUPPLY AND GROUND CIRCUIT

WCS-39

< DTC/CIRCUIT DIAGNOSIS >

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DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

COMBINATION METER

COMBINATION METER : Diagnosis Procedure

INFOID:0000000009864208

1.

CHECK FUSE

Check for blown fuses.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between combination meter and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector.

3.

Check continuity between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Power source

Fuse No.

Battery

6

Ignition switch ON or START 

4

Terminals

Ignition switch po-

sition

Voltage

(Approx.)

(+)

(

−

)

Combination meter

Ground

Connector

Terminal

M34

1

OFF

Battery voltage

2

ON

Combination meter

Ground

Continuity

Connector

Terminal

M34

3

Existed

4

23

WCS-40

< DTC/CIRCUIT DIAGNOSIS >

METER BUZZER CIRCUIT

METER BUZZER CIRCUIT

Component Function Check

INFOID:0000000009650459

1.

CHECK OPERATION OF METER BUZZER

1.

Select “BUZZER” of “BCM” on CONSULT.

2.

Perform “LIGHT WARN ALM” of “Active Test”.

Does meter buzzer beep?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK COMBINATION METER INPUT SIGNAL

Select the “Data Monitor” for the “METER/M&A” and check the “BUZZER” monitor value.

Is the inspection result normal?

YES

>> Replace combination meter. Refer to 

MWI-93, "Removal and Installation"

.

NO

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

Diagnosis Procedure

INFOID:0000000009650460

1.

CHECK POWER SUPPLY OF COMBINATION METER

Check power supply of combination meter. Refer to 

MWI-72, "COMBINATION METER : Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair power supply circuit of combination meter.

BUZZER

Under the condition of buzzer input

: On

Except above

: Off

WCS

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

WCS-41

< DTC/CIRCUIT DIAGNOSIS >

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SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

Component Function Check

INFOID:0000000009650461

1.

CHECK COMBINATION METER INPUT SIGNAL

Select the “Data Monitor” for the “METER/M&A” and check the “BUCKLE SW” monitor value.

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009650462

1.

CHECK COMBINATION METER INPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> Replace combination meter. Refer to 

MWI-93, "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 switch (driver side) connector.

3.

Check continuity between combination meter harness connector and seat belt buckle switch (driver side)
harness connector.

4.

Check harness continuity between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT

Check harness continuity between seat belt buckle switch (driver side) harness connector and ground.

BUCKLE SW

When seat belt is fastened

: Off

When seat belt is unfastened

: On

Terminals

Condition

Voltage

(Approx.)

(+)

(-)

Combination meter

Ground

Connector

Terminal

M34

35

When driver seat belt is fastened

12 V

When driver seat belt is unfastened

0 V

Combination meter

Seat belt buckle switch (driver side)

Continuity

Connector

Terminal

Connector

Terminal

M34

35

B523

51

Existed

Combination meter

Ground

Continuity

Connector

Terminal

M34

35

Not existed