Infiniti EX35. Manual - part 744

EXL-20

< FUNCTION DIAGNOSIS >

[XENON TYPE]

ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM

ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM

System Diagram

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System Description

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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)
- 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"
- Vehicle speed approximately 25 km/h (15.5 MPH) or more (left swivel only; Right swivel activates regardless

of the vehicle speed.)

JPLIA0912GB

ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM

EXL-21

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[XENON TYPE]

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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 the unified

meter and 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.

- Engine starts.
- Headlamp is turned ON.

EXL-22

< FUNCTION DIAGNOSIS >

[XENON TYPE]

ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM

- Vehicle posture becomes stable after changing the vehicle posture change is detected with the headlamp

ON and the vehicle stopped.

- Vehicle speed is maintained with the headlamp ON and the vehicle driven.

Component Parts Location

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Component Description

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1.

IPDM E/R

2.

ECM

3.

Swivel actuator

4.

Aiming motor

5.

Steering angle sensor

6.

AFS OFF switch

7.

AFS control unit

8.

Height sensor

9.

AFS OFF indicator lamp

10. Unified meter and A/C amp.

A.

Engine room dash panel (RH)

B.

Behind the glove box

C.

Front combination lamp (back)

D.

Steering column cover (inside)

E.

Instrument driver lower panel

F.

Behind the instrument driver lower 
panel 

G.

Rear suspension member (LH)

H.

On the combination meter

I.

Behind the cluster lid C

JPLIA0996ZZ

ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM

EXL-23

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Part

Description

AFS control unit

Refer to 

EXL-56, "Description"

.

Swivel actuator

Refer to 

EXL-44, "Description"

.

Aiming motor

Refer to 

EXL-73, "Description"

.

AFS OFF switch

Inputs AFS OFF switch ON/OFF signal to AFS control unit.

Height sensor

Refer to 

EXL-50, "Description"

.

Steering angle sensor

Refer to 

EXL-59, "Description"

.

IPDM E/R

Transmits the headlamp (LO) ON signal and the headlamp (HI) ON signal to AFS control 
unit with CAN communication.

ECM

Transmits the engine speed signal to AFS control unit with CAN communication.

TCM

Refer to 

EXL-53, "Description"

.

Unified meter and A/C amp.

Refer to 

EXL-54, "Description"

.

Combination meter

Turns AFS OFF indicator lamp ON/OFF/blinking according to AFS control unit request [with 
CAN communication (through unified meter and A/C amp.)].