Infiniti G37 Coupe. Manual - part 1387

WCS-20

< COMPONENT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

COMPONENT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

COMBINATION METER

COMBINATION METER : Diagnosis Procedure

INFOID:0000000001677413

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 terminal 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 terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

UNIFIED METER AND A/C AMP.

UNIFIED METER AND A/C AMP. : Diagnosis Procedure

INFOID:0000000001677414

1.

CHECK FUSE

Check for blown fuses.

Power source

Fuse No.

Battery

11

Ignition switch ON or START 

4

Terminals

Ignition switch

Voltage

(Approx.)

(+)

(–)

Combination meter

Connector

Terminals

M53

1

Ground

OFF

Battery voltage

21

ON

Combination meter

Ground

Continuity

Connector

Terminals

M53

5

Existed

15

22

WCS

POWER SUPPLY AND GROUND CIRCUIT

WCS-21

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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 unified meter and A/C amp. harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between unified meter and A/C amp. and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between unified meter and A/C amp. harness connector terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

BCM (BODY CONTROL MODULE)

BCM (BODY CONTROL MODULE) : Diagnosis Procedure

INFOID:0000000001677418

1.

CHECK FUSE AND FUSIBLE LINK

Check that the following fuse and fusible link are not blown.

Is the fuse fusing?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is

blown.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

Power source

Fuse No.

Battery

6

Ignition switch ACC or ON

19

Ignition switch ON or START

3

Terminals

Ignition switch

Voltage

(Approx.)

(+)

(–)

Unified meter and A/C amp.

Connector

Terminals

M67

54

Ground

OFF

Battery voltage

41

ACC

53

ON

Unified meter and A/C amp.

Ground

Continuity

Connector

Terminals

M67

55

Existed

71

Signal name

Fuse and fusible link No.

Battery power supply

K

10

WCS-22

< COMPONENT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connectors.

3.

Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Terminals

Voltage

(Approx.)

(+)

(

−

)

BCM

Ground

Connector

Terminal

M118

1

Battery voltage

M119

11

BCM

Ground

Continuity

Connector

Terminal

M119

13

Existed

WCS

METER BUZZER CIRCUIT

WCS-23

< COMPONENT DIAGNOSIS >

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METER BUZZER CIRCUIT

Description

INFOID:0000000001606827

• 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:0000000001606828

1.

CHECK OPERATION OF METER BUZZER

1.

Connect the CONSULT-III.

2.

Perform “LIGHT WARN ALM” in “ACTIVE TEST” of “BCM (BUZZER)”.

Does meter buzzer beep?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

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

Is the inspection result normal?

YES

>> Replace combination meter.

NO

>> Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

Diagnosis Procedure

INFOID:0000000001606829

1.

CHECK POWER SUPPLY OF COMBINATION METER

Check power supply of combination meter. Refer to 

WCS-20, "COMBINATION METER : Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair power supply circuit of combination meter.

2.

CHECK BATTERY POWER SUPPLY OF UNIFIED METER AND A/C AMP.

Check battery power supply of unified meter and A/C amp. Refer to 

WCS-20, "UNIFIED METER AND A/C

AMP. : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair power supply circuit of unified meter and A/C amp.

“BUZZER”

Under the condition of buzzer input

: On

Except above

: Off