Infiniti EX35. Manual - part 743

EXL-16

< FUNCTION DIAGNOSIS >

[XENON TYPE]

AUTO LIGHT SYSTEM

Component Description

INFOID:0000000003135263

Part

Description

BCM

• Judges each switch condition by the combination switch reading function.
• Judges the outside brightness from the optical sensor signal.
• Judges the OFF timing according to the vehicle condition.
• Judges the ON/OFF status of the exterior lamp and each illumination according to the 

outside brightness and the vehicle condition.
Requests ON/OFF of each relay to IPDM E/R (with CAN communication).

IPDM E/R

Controls the integrated relay, and supplies voltage to the load according to the request 
from BCM (with CAN communication).

Combination switch
(Lighting & turn signal switch)

Refer to 

BCS-8, "System Diagram"

.

Optical sensor

Refer to 

EXL-81, "Description"

.

DAYTIME RUNNING LIGHT SYSTEM

EXL-17

< FUNCTION DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

DAYTIME RUNNING LIGHT SYSTEM

System Diagram

INFOID:0000000003135264

System Description

INFOID:0000000003135265

OUTLINE

• Turns the front fog lamp ON as the daytime running light.
• Daytime running light is controlled by daytime running light control function and combination switch reading

function of BCM, and relay control function of IPDM E/R.

DAYTIME RUNNING LIGHT OPERATION 

• BCM detects the combination switch condition by the combination switch reading function.
• BCM detects the vehicle condition depending on the following signals.
- Engine condition signal (received from ECM with CAN communication)
- Parking brake switch signal (received from unified meter and A/C amp. with CAN communication)
• BCM transmits the front fog light request signal to IPDM E/R with CAN communication according to the day-

time running light ON condition.

Daytime running light ON condition

- While the engine running with the parking brake released

Daytime running light OFF condition

- Engine stopped
- Headlamp ON (Passing included)
• IPDM E/R turns the integrated front fog lamp relay ON and turns the front fog lamp ON according to the front

fog light request signal.

JPLIA0006GB

EXL-18

< FUNCTION DIAGNOSIS >

[XENON TYPE]

DAYTIME RUNNING LIGHT SYSTEM

Component Parts Location

INFOID:0000000003135266

Component Description

INFOID:0000000003135267

1.

Daytime running light
(Front fog lamp)

2.

Combination switch

3.

BCM

4.

IPDM E/R

5.

ECM

6.

Unified meter and A/C amp.

A.

Dash side lower (Passenger side)

B.

Engine room dash panel (RH)

C.

Behind the glove box

D.

Behind the cluster lid C

JPLIA0944ZZ

Part

Description

BCM

• Judges each switch condition with the combination switch reading function.
• Judges the headlamp ON/OFF status according to the vehicle condition. Requests 

the front fog lamp relay ON to IPDM E/R (with CAN communication). 

IPDM E/R

Controls the integrated relay and supplies voltage to the load according to the request 
from BCM (with CAN communication).

DAYTIME RUNNING LIGHT SYSTEM

EXL-19

< FUNCTION DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Combination switch
(Lighting & turn signal switch)

Refer to 

BCS-8, "System Diagram"

.

ECM

Transmits the engine condition signal to BCM with CAN communication.

Unified meter and A/C amp.

Transmits the parking brake switch signal to BCM with CAN communication.

Part

Description