Infiniti G37 Coupe. Manual - part 1079

 

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Infiniti G37 Coupe. Manual - part 1079

 

 

SBC-24

< COMPONENT DIAGNOSIS >

SEAT BELT BUCKLE SWITCH (DRIVER SIDE) CIRCUIT CHECK

Is the inspection result normal?

YES

>> Refer to 

SBC-24, "Component Inspection (Driver seat belt buckle switch ground circuit)"

.

NO

>> Replace LH seat belt buckle.

Component Inspection (Driver seat belt buckle switch ground circuit)

INFOID:0000000001712002

1.

CHECK LH SEAT BELT BUCKLE SWITCH GROUND CIRCUIT HARNESS

Does continuity between LH seat belt buckle switch harness connector terminal 2 and ground exist?

Is the inspection result normal?

YES

>> LH seat belt buckle switch system is normal.

NO

>> Repair or replace harness between LH seat belt buckle switch and ground.

Terminal

Measuring condition

Continuity

1

2

When seat belt is not fastened

Existed

When seat belt is fastened

Not existed

2 - Ground

Existed

SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) CIRCUIT CHECK

SBC-25

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SBC

N

O

P

SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) CIRCUIT CHECK

Description

INFOID:0000000001711995

• Perform the control of tension reducer according to the seat belt buckle switch ON/OFF.
• If the seat belt is not fastened when the ignition switch is turned ON, it detects whether the seat belt is fas-

tened or not so as to turn on the seat belt warning lamp of combination meter.

• The seat belt buckle switch is installed in the seat belt buckle.

Component Function Check

INFOID:0000000001711996

1.

CHECK PRE-CRASH SEAT BELT CONTROL UNIT INPUT SIGNAL

With CONSULT-III
When checking “BUCKLE SW RH” on DATA MONITOR screen, check that ON/OFF display changes are syn-
chronized with the insertion operation to the seat belt buckle.

Without CONSULT-III
1.

Turn the ignition switch ON.

2.

Check that voltage between RH seat belt buckle switch harness connector terminal 1 and ground is nor-
mal.

Is the inspection result normal?

YES

>> RH seat belt buckle switch system is normal.

NO

>> GO TO 2.

2.

CHECK RH SEAT BELT BUCKLE SWITCH HARNESS

1.

Turn the ignition switch OFF.

2.

Disconnect pre-crash seat belt control unit connector and RH seat belt buckle switch connector.

3.

Does continuity between pre-crash seat belt control unit harness connector terminal 8 and RH seat belt
buckle switch harness connector terminal 1 exist?

4.

Does continuity between pre-crash seat belt control unit harness connector terminal 8 and ground exist?

Is the inspection result normal?

YES

>> Refer to 

SBC-25, "Component Inspection (Passenger seat belt buckle switch)"

.

NO

>> Repair or replace harness between pre-crash seat belt control unit and RH seat belt buckle

switch.

Component Inspection (Passenger seat belt buckle switch)

INFOID:0000000001711997

1.

CHECK RH SEAT BELT BUCKLE SWITCH

Check that continuity between RH seat belt buckle switch terminals 1 and 2 is normal when performing the
insertion operation to the seat belt buckle.

BUCKLE SW RH

When RH seat belt is 
not fastened

OFF

When RH seat belt is 
fastened

ON

Terminal

Measuring condition

Voltage (V)

(+)

(-)

1

Ground

When seat belt is not fastened

Approx. 0

When seat belt is fastened

Approx. 5

8 - 1

Existed

8 - Ground

Not existed

SBC-26

< COMPONENT DIAGNOSIS >

SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) CIRCUIT CHECK

Is the inspection result normal?

YES

>> Refer to 

SBC-26, "Component Inspection (Passenger seat belt side buckle switch ground circuit)"

.

NO

>> Replace RH seat belt buckle.

Component Inspection (Passenger seat belt side buckle switch ground circuit) 

INFOID:0000000001711998

1.

CHECK RH SEAT BELT BUCKLE SWITCH GROUND CIRCUIT HARNESS

Does continuity between RH seat belt buckle switch harness connector terminal 2 and ground exist?

Is the inspection result normal?

YES

>> RH seat belt buckle switch system is normal.

NO

>> Repair or replace harness between RH seat belt buckle switch and ground.

Terminal

Measuring condition

Continuity

1

2

When seat belt is not fastened

Existed

When seat belt is fastened

Not existed

2 - Ground

Existed

IGNITION POWER SUPPLY CIRCUIT CHECK

SBC-27

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SBC

N

O

P

IGNITION POWER SUPPLY CIRCUIT CHECK

Description

INFOID:0000000001712003

• It is the power supply system when turning the ignition switch to IGN ON/OFF.
• The ignition switch is installed to the right side of the steering column.

Component Function Check

INFOID:0000000001712004

1.

CHECK FUSES

1.

Turn the ignition switch OFF.

2.

Check that the fuses are not blown.

CAUTION:

Refer to 

GI-41, "Circuit Inspection"

 for fuse number.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> If a fuse is blown, determine the possible cause, repair the affected circuit, and replace the blown

fuse.

2.

CHECK IGNITION POWER SUPPLY CIRCUIT

1.

Disconnect the pre-crash seat belt control unit connector.

2.

Turn the ignition switch ON.

3.

Check that voltage between pre-crash seat belt control unit harness connector terminal 13 and ground is
normal.

Is the inspection result normal?

YES

>> Ignition power supply system is normal.

NO

>> Repair or replace pre-crash seat belt control unit ignition power supply circuit harness.

13 - Ground

Approx. 12V

 

 

 

 

 

 

 

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