Infiniti G37 Coupe. Manual - part 1046

POWER SUPPLY AND GROUND CIRCUIT

RF-9

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

RF

N

O

P

COMPONENT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

BCM

BCM : Diagnosis Procedure

INFOID:0000000001726781

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

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 the harness or connector.

3.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> INSPECTION END

NO

>> Repair the harness or connector.

SUNROOF MOTOR ASSEMBLY

SUNROOF MOTOR ASSEMBLY : Diagnosis Procedure

INFOID:0000000001722662

SUNROOF MOTOR ASSEMBLY

1.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect sunroof motor assembly connector.

3.

Turn ignition switch ON.

4.

Check voltage between sunroof motor assembly harness connector and ground.

Terminal No.

Signal name

Fuse and fusible link No.

1

Battery power supply

K

11

10

Terminals

Voltage

(Approx.)

(+)

(

−

)

BCM

Ground

Connector

Terminal

M118

1

Battery voltage

M119

11

BCM

Ground

Continuity

Connector

Terminal

M119

13

Existed

R F - 1 0

< COMPONENT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between sunroof motor assembly harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace the harness.

3.

CHECK SUNROOF MOTOR CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check continuity between BCM harness connector and sunroof motor assembly harness connector.

4.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace the harness.

4.

CHECK BCM OUTPUT SIGNAL

1.

Connect BCM connector.

2.

Turn ignition switch ON.

3.

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace BCM. Refer to 

BCS-79, "Exploded View"

.

5.

CHECK INTERMITTENT INCIDENT

Sunroof motor assembly 

Ground

Voltage (V)

(Approx.)

 Connector

Terminal 

R4

7

Ground

Battery voltage

9

Sunroof motor assembly

Ground

Continuity 

 Connector

Terminal

R4

10

Ground

Existed

BCM

Sunroof motor assembly

Continuity

Connector

Terminal

 Connector

Terminal

M118

2

R4

7

Existed

3

9

BCM

Ground

Continuity

 Connector

Terminal

M118

2

Ground

Not existed

3

BCM

Ground

Voltage (V)

(Approx.)

 Connector

Terminal 

M118

2

Ground

Battery voltage

3

POWER SUPPLY AND GROUND CIRCUIT

RF-11

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

RF

N

O

P

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

RF-12

< COMPONENT DIAGNOSIS >

SUNROOF SWITCH

SUNROOF SWITCH

Description

INFOID:0000000001722639

• BCM supplies power.
• Sunroof motor assembly is sunroof motor and CPU integrated type.
• Tilts up/down & slides open/close by sunroof switch operation.
• In order to close sunroof lid certainly with the signal from unified meter and A/C amp. at the time of high

speed run, the sunroof motor torque at the time of tilt-down operation is controlled.

Component Function Check

INFOID:0000000001722640

1.

CHECK SUNROOF MOTOR FUNCTION

Check tilt up/down & slide open/close operations with sunroof switch.
Is the inspection result normal?

YES

>> Sunroof motor function is OK.

NO

>> Refer to 

RF-12, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001722641

1.

CHECK SUNROOF SWITCH INPUT SIGNAL 

1.

Turn ignition switch ON.

2.

Check voltage between sunroof motor assembly harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 2.

2.

CHECK SUNROOF SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect sunroof motor assembly connector and sunroof switch connector.

3.

Check continuity between sunroof motor assembly harness connector and sunroof switch harness con-
nector.

4.

Check continuity between sunroof motor assembly harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 3.

Sunroof motor assembly connector

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(–)

R4

5

Ground

Sunroof switch is operated
TILT DOWN or SLIDE OPEN

0

Other than above

Battery voltage

1

Sunroof switch is operated 
TILT UP or SLIDE CLOSE

0

Other than above

Battery voltage

Sunroof motor assembly

Sunroof switch

Continuity

Connector

Terminal

 Connector

Terminal

R4

5

R16

1

Existed

1

3

Sunroof motor assembly

Ground

Continuity

 Connector

Terminal

R4

5

Ground

Not existed

1