Infiniti G37 Coupe. Manual - part 1095

SE-48

< COMPONENT DIAGNOSIS >

SEAT BELT BUCKLE SWITCH

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

NO

>> GO TO 2.

2.

CHECK SEAT BELT BUCKLE SWITCH CIRCUIT

1.

Disconnect passenger seat control unit connector and seat belt buckle switch connector.

2.

Check continuity between passenger seat control unit harness connector and seat belt buckle switch har-
ness connector.

3.

Check continuity between passenger seat control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT

Check continuity between seat belt buckle switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK PASSENGER SEAT CONTROL UNIT OUTPUT

1.

Connect passenger seat control unit connector.

2.

Check voltage between passenger seat control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace passenger seat control unit. Refer to 

SE-165, "Removal and Installation"

.

5.

CHECK SEAT BELT BUCKLE SWITCH

Refer to 

SE-49, "PASSENGER SIDE : Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

NO

>> Replace seat belt buckle switch. (Built in seat belt buckle.)

Passenger seat control unit

Ground

Condition

Voltage (V)

(Approx.)

Connector

Terminal

B552

5

Ground

Passenger side seat belt is fastened, 
and power walk-in switch is pressed.

5

Released

0

Passenger seat control unit

Seat belt buckle switch

Continuity

Connector

Terminal

Connector

Terminal

B552

5

B213

1

Existed

Passenger seat control unit

Ground

Continuity 

Connector

Terminal

B552

5

Ground

Not existed

Seat belt buckle switch

Ground

Continuity

Connector

Terminal

B213

2

Ground

Existed

Passenger seat control unit

Ground

Voltage (V)

(Approx.)

Connector

Terminal

B552

5

Ground

5

SEAT BELT BUCKLE SWITCH

SE-49

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

PASSENGER SIDE : Component Inspection

INFOID:0000000001770922

1.

CHECK SEAT BELT BUCKLE SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect seat belt buckle switch connector.

3.

Check continuity between seat belt buckle switch terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace seat belt buckle switch. (Built in seat belt buckle.)

Seat belt buckle switch

Condition

Continuity

Terminal

1

2

Passenger side 
seat belt

Fastened

Not existed

Released

Existed

SE-50

< COMPONENT DIAGNOSIS >

SLIDING LIMIT SWITCH

SLIDING LIMIT SWITCH

DRIVER SIDE

DRIVER SIDE : Description

INFOID:0000000001766506

Sliding limit switch is installed on seat cushion frame. Sliding limit switch detects condition of seat sliding.

DRIVER SIDE : Component Function Check

INFOID:0000000001766507

1.

CHECK FUNCTION

1.

Select “FWD LIMIT SW” in “Data Monitor” mode with CONSULT-III. 

2.

Check the sliding limit switch signal under the following condition.

Is the indication normal?

YES

>> INSPECTION END

NO

>> Go to 

SE-50, "DRIVER SIDE : Diagnosis Procedure"

.

DRIVER SIDE : Diagnosis Procedure

INFOID:0000000001766508

1.

CHECK SLIDING LIMIT SWITCH SIGNAL

1.

Turn ignition switch OFF.

2.

Check voltage between driver seat control unit harness connector and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

NO

>> GO TO 2.

2.

CHECK SLIDING LIMIT SWITCH CIRCUIT

1.

Disconnect driver seat control unit connector and sliding limit switch connector.

2.

Check continuity between driver seat control unit harness connector and sliding limit switch harness con-
nector.

3.

Check continuity between driver seat control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK SLIDING LIMIT SWITCH GROUND CIRCUIT

Check continuity between sliding limit switch harness connector and ground.

Test item

Condition

Status

FWD LIMIT SW

Seat sliding

Front edge

ON

Other than above

OFF

Driver seat control unit

Ground

Condition

Voltage (V)

(Approx.)

Connector

Terminal

B503

4

Ground

Sliding position is front edge and power 
walk in switch is pressed.

5

Other than above

0

Driver seat control unit

Sliding limit switch

Continuity

Connector

Terminal

Connector

Terminal

B503

4

B514

4

Existed

Driver seat control unit

Ground

Continuity 

Connector

Terminal

B503

4

Ground

Not existed

SLIDING LIMIT SWITCH

SE-51

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK DRIVER SEAT CONTROL UNIT OUTPUT

1.

Connect driver seat control unit connector.

2.

Check voltage between driver seat control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace driver seat control unit. Refer to 

SE-164, "Removal and Installation"

.

5.

CHECK SLIDING LIMIT SWITCH

Refer to 

SE-51, "DRIVER SIDE : Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

NO

>> Replace sliding limit switch. (Built in seat cushion frame.)

DRIVER SIDE : Component Inspection

INFOID:0000000001766509

1.

CHECK SLIDING LIMIT SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect sliding limit switch connector.

3.

Check continuity between sliding limit switch terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace sliding limit switch. (Built in seat cushion frame.)

PASSENGER SIDE

PASSENGER SIDE : Description

INFOID:0000000001831219

Sliding limit switch is installed on seat cushion frame. Sliding limit switch detects condition of seat sliding.

PASSENGER SIDE : Diagnosis Procedure

INFOID:0000000001770943

1.

CHECK SLIDING LIMIT SWITCH SIGNAL

1.

Turn ignition switch OFF.

2.

Check voltage between passenger seat control unit harness connector and ground.

Sliding limit switch

Ground

Continuity

Connector

Terminal

B514

32

Ground

Existed

Driver seat control unit

Ground

Voltage (V)

(Approx.)

Connector

Terminal

B503

4

Ground

5

Sliding limit switch

Condition

Continuity

Terminal

4

32

Seat sliding

Front edge

Not existed

Other than above

Existed