Infiniti G37 Coupe. Manual - part 1094

SE-44

< COMPONENT DIAGNOSIS >

FORWARD SWITCH

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

NO

>> GO TO 2.

2.

CHECK FORWARD SWITCH CIRCUIT

1.

Disconnect passenger seat control unit connector and forward switch connector.

2.

Check continuity between passenger seat control unit harness connector and forward switch harness con-
nector.

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.

FORWARD SWITCH GROUND CIRCUIT

Check continuity between forward 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 FORWARD SWITCH

Refer to 

SE-45, "PASSENGER SIDE : Component Inspection"

.

Passenger seat control unit

Ground

Condition

Voltage (V)

(Approx.)

Connector

Terminal

B553

41

Ground

Seat back is folded down and 
power walk-in switch is pressed. 

0

Seat back is folded up and power 
walk-in switch is pressed. 

5

Seat back is folded up and seat 
reclining switch is operated. 

Battery voltage

Passenger seat control unit

Forward switch

Continuity

Connector

Terminal

Connector

Terminal

B553

41

B556

41

Existed

Passenger seat control unit

Ground

Continuity 

Connector

Terminal

B553

41

Ground

Not existed

Forward switch

Ground

Continuity

Connector

Terminal

B556

32

Ground

Existed

Passenger seat control unit

Ground

Voltage (V)

(Approx.)

Connector

Terminal

B553

41

Ground

5

FORWARD SWITCH

SE-45

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

NO

>> Replace forward switch. (Built in seat back frame.)

PASSENGER SIDE : Component Inspection

INFOID:0000000001770918

1.

CHECK FORWARD SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect forward switch connector.

3.

Check continuity between forward switch terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace forward switch. (Built in seat back frame.)

Forward switch

Condition

Continuity

Terminal

41

32

Passenger side 
seat back

Folded up

Not existed

Folded down

Existed

SE-46

< COMPONENT DIAGNOSIS >

SEAT BELT BUCKLE SWITCH

SEAT BELT BUCKLE SWITCH

DRIVER SIDE

DRIVER SIDE : Description

INFOID:0000000001766494

Seat belt buckle switch is installed in seat belt buckle. Seat belt buckle switch detects condition of seat belt.

DRIVER SIDE : Component Function Check

INFOID:0000000001766495

1.

CHECK FUNCTION

1.

Select “SEAT BELT SW” in “Data Monitor” mode with CONSULT-III. 

2.

Check the forward switch signal under the following condition.

Is the indication normal?

YES

>> INSPECTION END

NO

>> Refer to  

SE-46, "DRIVER SIDE : Diagnosis Procedure"

.

DRIVER SIDE : Diagnosis Procedure

INFOID:0000000001766496

1.

CHECK SEAT BELT BUCKLE 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 SEAT BELT BUCKLE SWITCH CIRCUIT

1.

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

2.

Check continuity between driver seat control unit harness connector and seat belt buckle switch harness
connector.

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 SEAT BELT BUCKLE SWITCH GROUND CIRCUIT

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

Test item

Condition

Status

SEAT BELT SW

Driver side seat belt

Fastened

ON

Released

OFF

Driver seat control unit

Ground

Condition

Voltage (V)

(Approx.)

Connector

Terminal

B503

5

Ground

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

5

Released

0

Driver seat control unit

Seat belt buckle switch

Continuity

Connector

Terminal

Connector

Terminal

B503

5

B13

1

Existed

Driver seat control unit

Ground

Continuity 

Connector

Terminal

B503

5

Ground

Not existed

SEAT BELT BUCKLE SWITCH

SE-47

< 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 SEAT BELT BUCKLE SWITCH

Refer to 

SE-47, "DRIVER 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.)

DRIVER SIDE : Component Inspection

INFOID:0000000001766497

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.)

PASSENGER SIDE

PASSENGER SIDE : Description

INFOID:0000000001831182

Seat belt buckle switch is installed in seat belt buckle. Seat belt buckle switch detects condition of seat belt.

PASSENGER SIDE : Diagnosis Procedure

INFOID:0000000001770921

1.

CHECK SEAT BELT BUCKLE SWITCH SIGNAL

1.

Turn ignition switch OFF.

2.

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

Seat belt buckle switch

Ground

Continuity

Connector

Terminal

B13

2

Ground

Existed

Driver seat control unit

Ground

Voltage (V)

(Approx.)

Connector

Terminal

B503

5

Ground

5

Seat belt buckle switch

Condition

Continuity

Terminal

1

2

Driver side seat 
belt

Fastened

Not existed

Released

Existed