Infiniti G37 Coupe. Manual - part 661

EXL-64

< COMPONENT DIAGNOSIS >

[XENON TYPE]

HEADLAMP (HI) CIRCUIT

HEADLAMP (HI) CIRCUIT

Description

INFOID:0000000001604655

The high beam solenoid drives the mobile valve shade. And the mobile valve shade switches the high beam
and low beam of headlamp.
• When the headlamp high relay is turned ON, magnetic force is

applied to the high beam solenoid (1) by a current. The mobile
valve shade (2) is switched to the high beam position.

• When the headlamp high relay is turned OFF, the current stops.

The mobile valve shade returns to the low beam position automati-
cally.

Component Function Check

INFOID:0000000001604656

1.

CHECK HEADLAMP (HI) OPERATION

IPDM E/R AUTO ACTIVE TEST

1.

Start IPDM E/R auto active test. Refer to 

PCS-11, "Diagnosis Description"

.

2.

Check that the headlamp switches to the high beam.

CONSULT-III ACTIVE TEST

1.

Select "EXTERNAL LAMP" of IPDM E/R active test item.

2.

With operating the test items, check that the headlamp switches to the high beam.

NOTE:
HI/LO is repeated 1 second each when using the IPDM E/R auto active test.

Does the headlamp switch to the high beam?

YES

>> Headlamp (HI) circuit is normal.

NO

>> Refer to 

EXL-64, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001604657

1.

CHECK HEADLAMP (HI) OUTPUT VOLTAGE

CONSULT-III ACTIVE TEST

1.

Turn the ignition switch OFF.

2.

Disconnect the front combination lamp connector.

3.

Turn the ignition switch ON.

4.

Select "EXTERNAL LAMP" of IPDM E/R active test item.

5.

With operating the test items, check the voltage between the IPDM E/R harness connector and the
ground.

JSLIA0129ZZ

Hi

: Headlamp switches to the high beam.

Off

: Headlamp OFF

HEADLAMP (HI) CIRCUIT

EXL-65

< 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 2.

NO

>> GO TO 3.

2.

CHECK HEADLAMP (HI) OPEN CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect IPDM E/R connector.

3.

Check continuity between the IPDM E/R harness connector and the front combination lamp harness con-
nector.

Does continuity exist?

YES

>> Replace the front combination lamp. 

NO

>> Repair the harnesses or connectors.

3.

CHECK HEADLAMP (HI) FUSE

1.

Turn the ignition switch OFF.

2.

Check that the following fuses are not fusing.

Is the fuse fusing?

YES

>> GO TO 4.

NO

>> Replace IPDM E/R.

4.

CHECK FRONT COMBINATION LAMP (HI) SHORT CIRCUIT

1.

Disconnect IPDM E/R connector.

2.

Check continuity between the IPDM E/R harness connector terminal and the ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors. And then replace the fuse.

NO

>> Replace the fuse. (Replace IPDM E/R if the fuse is fusing again.)

Terminals

Condition

Voltage

(Approx.)

(+)

(

−

)

IPDM E/R

Ground

External 

lamp

Connector

Terminal

RH

E8

89

Hi

Battery 
voltage

LH

90

Off

0 V

IPDM E/R

Front combination lamp

Continuity

Connector

Terminal

Connector

Terminal

RH

E8

89

E28

7

Existed

LH

90

E58

7

Unit

Location

Fuse No.

Capacity

Headlamp HI (RH) IPDM E/R

#55

10 

A

Headlamp HI (LH) IPDM E/R

#54

10 

A

IPDM E/R 

Ground

Continuity

Connector

Terminal

RH

E8

89

Not existed

LH

90

EXL-66

< COMPONENT DIAGNOSIS >

[XENON TYPE]

HEADLAMP (LO) CIRCUIT

HEADLAMP (LO) CIRCUIT

Description

INFOID:0000000001604658

Headlamp (LO) circuit is connected to HID control unit integrated in the headlamp. Headlamp (LO) circuit turns
xenon headlamp ON.
For the details of HID control unit and the xenon headlamp, refer to 

EXL-68, "Description"

.

Component Function Check

INFOID:0000000001604659

1.

CHECK HEADLAMP (LO) OPERATION

IPDM E/R AUTO ACTIVE TEST

1.

Start IPDM E/R auto active test. Refer to 

PCS-11, "Diagnosis Description"

.

2.

Check that the headlamp is turned ON.

CONSULT-III ACTIVE TEST

1.

Select "EXTERNAL LAMP" of IPDM E/R active test item.

2.

With operating the test items, check that the headlamp is turned ON.

Is the headlamp turned ON?

YES

>> Headlamp (LO) is normal.

NO

>> Refer to 

EXL-66, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001604660

1.

CHECK HEADLAMP (LO) OUTPUT VOLTAGE

CONSULT-III ACTIVE TEST

1.

Turn the ignition switch OFF.

2.

Disconnect the front combination lamp connector.

3.

Turn the ignition switch ON.

4.

Select "EXTERNAL LAMP" of IPDM E/R active test item.

5.

With operating the test items, check the voltage between the IPDM E/R harness connector and the
ground.

Is the measurement value normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK HEADLAMP (LO) OPEN CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect IPDM E/R connector.

3.

Check continuity between the IPDM E/R harness connector and the front combination lamp harness con-
nector.

Lo

: Headlamp ON

Off

: Headlamp OFF

Terminals

Test item

Voltage

(Approx.)

(+)

(

−

)

IPDM E/R

Ground

External 

lamp

Connector

Terminal

RH

E8

83

Lo

Battery 
voltage

LH

84

Off

0 V

IPDM E/R

Front combination lamp

Continuity

Connector

Terminal

Connector

Terminal

HEADLAMP (LO) CIRCUIT

EXL-67

< COMPONENT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Does continuity exist?

YES

>> GO TO 5.

NO

>> Repair the harnesses or connectors.

3.

CHECK HEADLAMP (LO) FUSE

1.

Turn the ignition switch OFF.

2.

Check that the following fuses are not fusing.

Is the fuse fusing?

YES

>> GO TO 4.

NO

>> Replace IPDM E/R.

4.

CHECK HEADLAMP (LO) SHORT CIRCUIT

1.

Disconnect IPDM E/R connector.

2.

Check continuity between the IPDM E/R harness connector and the ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors. And then replace the fuse.

NO

>> Replace the fuse. (Replace IPDM E/R if the fuse is fusing again.)

5.

CHECK HEADLAMP GROUND OPEN CIRCUIT

Check continuity between the front combination lamp harness connector and the ground.

Does continuity exist?

YES

>> Perform the xenon headlamp diagnosis. Refer to 

EXL-68, "Description"

.

NO

>> Repair the harnesses or connectors.

RH

E8

83

E28

5

Existed

LH

84

E58

5

Unit

Lotion

Fuse No.

Capacity

Headlamp LO (RH) 

IPDM E/R

#57

15 A

Headlamp LO (LH) 

IPDM E/R

#56

15 A

IPDM E/R

Ground

Continuity

Connector

Terminal

RH

E8

83

Not existed

LH

84

Front combination lamp

Ground

Continuity

Connector

Terminal

RH

E28

3

Existed

LH

E58

3