Infiniti G37 Coupe. Manual - part 649

EXL-16

< FUNCTION DIAGNOSIS >

[XENON TYPE]

DAYTIME RUNNING LIGHT SYSTEM

Component Parts Location

INFOID:0000000001604591

Component Description

INFOID:0000000001604592

1.

Daytime running light
(Front fog lamp)

2.

Combination switch

3.

BCM

4.

ECM

5.

IPDM E/R

6.

Unified meter and A/C amp.

A.

Dash side lower (Passenger side)

B.

Behind glove box

C.

Engine room dash panel (RH)

D.

Behind cluster lid C

JPLIA0584ZZ

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-17

< 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-5, "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

EXL-18

< FUNCTION DIAGNOSIS >

[XENON TYPE]

ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM

ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM

System Diagram

INFOID:0000000001604593

System Description

INFOID:0000000001604594

OUTLINE

• AFS (ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM) is controlled by AFS control unit.
• AFS has AFS control (swivel control) and the headlamp auto aiming control.
- AFS control swivels the headlamp to the steering direction.
- Headlamp auto aiming control moves the headlamp light axis up/down according to the vehicle height.

AFS (ADAPTIVE FRONT-LIGHTING SYSTEM)

AFS Control Description

• AFS control controls the headlamp (right) only when the steering wheel is turned rightward, and the head-

lamp (left) only when the steering wheel is turned leftward.

• AFS control unit detects the vehicle condition necessary for AFS control with the following signals.
- AFS switch signal
- Steering angle sensor signal (received from steering angle sensor with CAN communication)
- Engine speed signal (received from ECM with CAN communication)
- Shift position signal (received from TCM with CAN communication)
- Reverse signal (received from back-up lamp switch)
- Low beam status and high beam status (received from IPDM E/R with CAN communication)
- Vehicle speed signal (received from unified meter and A/C amp. with CAN communication)
• When the operation conditions are satisfied, AFS control unit controls the swivel angle depending on the

steering angle and the vehicle speed. 

AFS operation condition

- Swivel actuator initialization completed
- AFS OFF switch OFF
- Headlamp ON
- While the engine running
- Selector lever position other than "P" or "R" (A/T models)
- Shift knob position other than reverse (M/T models)

JPLIA0100GB

ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM

EXL-19

< FUNCTION DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

- Vehicle speed approximately 25 km/h or more (left swivel only; Right swivel activates regardless of the vehi-

cle speed.)

Swivel Actuator Initialization

• AFS control unit performs the swivel actuator initialization when detecting that the engine starts.
- Swivels the headlamp to the vehicle-center side until it hits the stopper.
- Returns the swivel angle from the stopper. Completes the initialization with regarding the returned position

as the swivel angle 0

°

 (straight-forward position). 

Swivel Operation

• AFS control unit transmits the drive signal to the swivel actuator when activation conditions are satisfied.

And swivels the headlamp.

- The swivel starts after steering approximately 20

°

 or more from straight-forward position.

NOTE:
The steering angle differs between right turn and left turn.

- The swivel angle becomes the maximum angle toward the driving direction if the steering angle is approxi-

mately 90

°

 or more depending on the vehicle speed. The swivel angle is maintained by shutting off the drive

signal.

- The swivel starts, and returns to the swivel angle 0

°

 (straight-forward position) when the steering is returned

to the straight-forward position.

• AFS control unit returns the swivel angle to the straight-forward position, and stops the swivel regardless of

the steering angle if the operation condition is not satisfied while the swivel angle is 0

°

.

AFS OFF Indicator Lamp

• AFS control unit transmits AFS OFF indicator lamp signal to the combination meter (through unified meter &

A/C amp.) with CAN communication.

• Combination meter turns AFS OFF indicator lamp ON/OFF/blinking according to AFS OFF indicator lamp

signal. 

- AFS OFF indicator lamp is turned ON for 1 second for the AFS OFF indicator lamp bulb check when the igni-

tion switch is turned ON. AFS OFF indicator lamp is turned OFF within 1 second when the engine starts. 

- AFS OFF indicator lamp is turned OFF when AFS OFF switch is turned ON.
- AFS OFF indicator lamp blinks (1 second each) if AFS control unit detects a specific DTC.

NOTE:
Combination meter blinks AFS OFF indicator lamp (approximately 1 second each) if AFS OFF indicator
lamp signal is not received from AFS control unit. 

HEADLAMP AUTO AIMING

Headlamp Auto Aiming Control Description

• Headlamp auto aiming control controls the headlamp light axis height appropriately according to the vehicle

height.

• AFS control unit detects the vehicle condition necessary for headlamp auto aiming control with the following

signals.

- Height sensor signal
- Engine speed signal (received from ECM with CAN communication)
- Low beam status signal and high beam status signal (received from IPDM E/R with CAN communication)
- Vehicle speed signal (received from unified meter and A/C amp. with CAN communication)
• When the operation conditions are satisfied, AFS control unit transmits the aiming motor drive signal for

adjusting the headlamp axis height. 

Headlamp auto aiming operation condition

- Headlamp ON
- While the engine running
- Vehicle speed (Control mode is switched according to the driving condition.)

Headlamp Auto Aiming Operation

• AFS control unit calculates the vehicle pitch angle from the height sensor signal. AFS control unit judges the

angle for adjusting the axis gap from the preset position. 

CAUTION:

Adjusted axis position may differ from the preset position although the headlamp auto aiming acti-
vates properly if the suspension is replaced or worn. 

• AFS control unit controls the headlamp axis by changing the aiming motor drive signal output according to

the vehicle-rearward height when detecting the following vehicle condition. Output is maintained if other con-
dition than following is detected.