Infiniti G37 Coupe. Manual - part 664

EXL-76

< COMPONENT DIAGNOSIS >

[XENON TYPE]

TURN SIGNAL LAMP CIRCUIT

TURN SIGNAL LAMP CIRCUIT

Description

INFOID:0000000001604670

BCM performs the high flasher operation (fail-safe) if any bulb or harness of the turn signal lamp circuit is
open.
NOTE:
Turn signal lamp blinks at normal speed when using the hazard warning lamp.

Component Function Check

INFOID:0000000001604671

1.

CHECK TURN SIGNAL LAMP

CONSULT-III ACTIVE TEST

1.

Select "FLASHER" of BCM (FLASHER) active test item.

2.

With operating the test items, check that the turn signal lamp blinks.

Does the turn signal lamp blink?

YES

>> Turn signal lamp circuit is normal.

NO

>> Refer to 

EXL-76, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001604672

1.

CHECK TURN SIGNAL LAMP BULB

Check the applicable lamp bulb.

Is the bulb normal?

YES

>> GO TO 2.

NO

>> Replace the bulb.

2.

CHECK TURN SIGNAL LAMP OUTPUT VOLTAGE

CONSULT-III ACTIVE TEST

1.

Turn the ignition switch OFF.

2.

Disconnect the front combination lamp connector or the rear combination lamp connector.

3.

Turn the ignition switch ON.

4.

Select "FLASHER" of BCM (FLASHER) active test item.

5.

With operating the turn signal switch, check the voltage between the BCM harness connector and the
ground.

LH

: Turn signal lamp LH blinking 

RH

: Turn signal lamp RH blinking 

Off

: The turn signal lamp OFF

TURN SIGNAL LAMP CIRCUIT

EXL-77

< COMPONENT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Replace BCM.

3.

CHECK TURN SIGNAL LAMP OPEN CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check the voltage between the BCM harness connector and the front combination lamp or the rear com-
bination lamp harness connector.

Front combination lamp

Rear combination lamp

Does continuity exist?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK TURN SIGNAL LAMP SHORT CIRCUIT

Check continuity between the BCM harness connector and the ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors.

Terminals

Test item

Voltage (Approx.)

(+)

(

−

)

BCM

Ground

FLASHER

Connector

Terminal

Front 
RH

M119

17

LH or RH

Front 
LH

18

Rear 
RH

M120

20

Off

0 V

Rear 
LH

25

PKID0926E

BCM

Front combination lamp 

Continuity

Connector

Terminal

Connector

Terminal

RH

M119

17

E28

6

Existed

LH

18

E58

6

BCM

Rear combination lamp

Continuity

Connector

Terminal

Connector

Terminal

RH

M120

20

B67

4

Existed

LH

25

B60

4

BCM

Ground

Continuity

Connector

Terminal

Front RH

M119

17

Not existed

Front LH

18

Rear RH

M120

20

Rear LH

25

EXL-78

< COMPONENT DIAGNOSIS >

[XENON TYPE]

TURN SIGNAL LAMP CIRCUIT

NO

>> GO TO 5.

5.

CHECK TURN SIGNAL LAMP GROUND OPEN CIRCUIT

Check the voltage between the BCM harness connector and the front combination lamp or the rear combina-
tion lamp and the ground.

Front combination lamp

Rear combination lamp

Does continuity exist?

YES

>> Replace the front combination lamp or the rear combination lamp.

NO

>> Repair the harnesses or connectors.

Front combination lamp

Ground

Continuity

Connector

Terminal

RH

E28

4

Existed

LH

E58

4

Rear combination lamp

Ground

Continuity

Connector

Terminal

RH

B67

3

Existed

LH

B60

3

OPTICAL SENSOR

EXL-79

< COMPONENT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

OPTICAL SENSOR

Description

INFOID:0000000001604673

Optical sensor converts the outside brightness (lux) to voltage and transmits the optical sensor signal to BCM.

Component Function Check

INFOID:0000000001604674

1.

CHECK OPTICAL SENSOR SIGNAL BY CONSULT-III

CONSULT-III DATA MONITOR

1.

Turn the ignition switch ON.

2.

Select "OPTICAL SENSOR" of BCM (HEADLAMP) data monitor item.

3.

Turn the lighting switch AUTO.

4.

With the optical sensor illuminating, check the monitor status. 

*: Illuminates the optical sensor. The value may be less than the standard value if brightness is weak.

Is the item status normal?

YES

>> Optical sensor is normal.

NO

>> Refer to 

EXL-79, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001604675

1.

CHECK OPTICAL SENSOR POWER SUPPLY INPUT

1.

Turn the ignition switch ON.

2.

Turn the lighting switch AUTO.

3.

Check the voltage between the optical sensor harness connector and the ground.

Is the measurement value normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK OPTICAL SENSOR GROUND INPUT

Check the voltage between the optical sensor harness connector and the ground.

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> GO TO 6.

Monitor item

Condition

Voltage (Approx.)

OPTICAL SEN-
SOR

Optical sensor

When illuminat-
ing

3.1 V or more *

When shutting 
off light

0.6 V or less

Terminals

Voltage

(Approx.)

(+)

(

−

)

Optical sensor

Ground

Connector

Terminal

M94

1

5 V

Terminals

Voltage

(Approx.)

(+)

(

−

)

Optical sensor

Ground

Connector

Terminal

M94

3

0 V