Infiniti FX35, FX50 (S51). Manual - part 1596

SBC-42

< DTC/CIRCUIT DIAGNOSIS >

SEAT BELT BUCKLE SWITCH (PASSENGER SIDE)

1.

Sit down to passenger seat.

2.

Check that seat belt warning lamp turns OFF when passenger seat belt is fastened, and then turns ON
when passenger seat belt is unfastened.

Is the inspection result normal?

YES

>> Seat belt buckle switch (passenger side) circuit is normal.

NO

>> Refer to 

SBC-42, "SEAT BELT WARNING LAMP SYSTEM : Diagnosis Procedure"

.

SEAT BELT WARNING LAMP SYSTEM : Diagnosis Procedure

INFOID:0000000005241771

1.

CHECK SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) CIRCUIT

1.

Turn the ignition switch ON.

2.

Check that voltage between seat belt buckle switch (passenger side) harness connector and ground.

*

1

: With climate controlled seat

*

2

: Without climate controlled seat

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect air bag diagnosis sensor unit connector and seat belt buckle switch (passenger side) connec-
tor.

3.

Check continuity between air bag diagnosis sensor unit harness connector and seat belt buckle switch
(passenger side) harness connector.

*

1

: With climate controlled seat

*

2

: Without climate controlled seat

4.

Check continuity between pre-crash seat belt control unit (passenger side) harness connector and
ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace harness between pre-crash seat belt control unit (passenger side) and seat belt

buckle switch (passenger side).

(+)

(–)

Condition

Voltage (V)

(Approx.)

Seat belt buckle switch (passenger side)

Connector

Terminal

B213

*1

1

*1

Ground

When passenger side 
seat belt is fastened

8.5

When passenger side 
seat belt is not fastened

0

B513

*2

61

*2

When passenger side 
seat belt is fastened

8.5

When passenger side 
seat belt is not fastened

0

Air bag diagnosis sensor unit

Seat belt buckle switch (passenger side)

Continuity

Connector

Terminal

Connector

Terminal

B215

25

B213

*1

1*

1

Existed

B513

*2

61*

2

Air bag diagnosis sensor unit

Ground

Continuity

Connector

Terminal

B215

25

Not existed

SEAT BELT BUCKLE SWITCH (PASSENGER SIDE)

SBC-43

< DTC/CIRCUIT DIAGNOSIS >

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3.

CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT

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

*

1

: With climate controlled seat

*

2

: Without climate controlled seat

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) 

Check seat belt buckle switch (passenger side). Refer to 

SBC-43, "SEAT BELT WARNING LAMP SYSTEM :

Component Inspection (Belt Buckle Switch)"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace seat belt buckle switch (passenger side).

SEAT BELT WARNING LAMP SYSTEM : Component Inspection (Belt Buckle Switch)

INFOID:0000000005241772

1.

CHECK SEAT BELT BUCKLE SWITCH (PASSENGER SIDE)

1.

Turn ignition switch OFF.

2.

Disconnect seat belt buckle switch connector.

3.

Check continuity of seat belt buckle (passenger side).

*

1

: With climate controlled seat

*

2

: Without climate controlled seat

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace seat belt buckle switch (passenger side).

Seat belt buckle switch (passenger side)

Ground

Continuity

Connector

Terminal

B213*

1

2

*1

Existed

B513

*2

60

*2

Seat belt buckle switch (passenger side)

Condition

Continuity

Connector

Terminal

B213

*1

1

2

When passenger side 
seat belt is not fastened

Existed

When passenger side 
seat belt is fastened

Not existed

B513

*2

61

60

When passenger side 
seat belt is not fastened

Existed

When passenger side 
seat belt is fastened

Not existed

SBC-44

< DTC/CIRCUIT DIAGNOSIS >

SEAT BELT WARNING LAMP CIRCUIT

SEAT BELT WARNING LAMP CIRCUIT

Diagnosis Procedure

INFOID:0000000005241773

1.

CHECK SEAT BELT WARNING LAMP CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect air bag diagnosis sensor unit connector.

3.

Turn ignition switch ON.

4.

Check that voltage between air bag diagnosis sensor unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace air bag diagnosis sensor unit.

NO

>> GO TO 2.

2.

CHECK SEAT BELT WARNING LAMP CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector.

3.

Check continuity between combination meter harness connector and air bag diagnosis sensor unit har-
ness connector.

4.

Check continuity between combination meter and ground.

Is the inspection result normal?

YES

>> Repair or replace combination meter.

NO

>> Repair or replace harness between combination meter and air bag diagnosis sensor unit.

Air bag diagnosis sensor unit

Ground

Voltage (V)

(Approx.)

Connector

Terminal

M147

24

Battery voltage

Combination meter

Air bag diagnosis sensor unit

Continuity

Connector

Terminal

Connector

Terminal

B53

30

M147

24

Existed

Combination meter

Ground

Continuity

Connector

Terminal

B53

30

Not existed

SEAT BELT WARNING SYSTEM

SBC-45

< DTC/CIRCUIT DIAGNOSIS >

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A

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SBC

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SEAT BELT WARNING SYSTEM

Wiring Diagram - SEAT BELT WARNING SYSTEM -

INFOID:0000000005241774

JCHWA0395GB