Infiniti M35/M45 Y50. Manual - part 897

AUTO LIGHT SYSTEM

LT-133

C

D

E

F

G

H

I

J

L

M

A

B

LT

5. 

CHECK OPTICAL SENSOR VOLTAGE 

1.

Connect BCM connector.

2.

Turn ignition switch ON.

3.

Check voltage between BCM harness connector and ground.

OK or NG

OK

>> Replace optical sensor. Refer to 

LT-133, "Removal and

Installation for Optical Sensor"

 .

NG

>> Replace BCM. Refer to 

BCS-15, "Removal and Installation of BCM"

 .

Removal and Installation for Optical Sensor

NKS003QD

REMOVAL

1.

Disengage the tab (A) and disconnect connector.

2.

Remove optical sensor (1).

INSTALLATION

Installation is the reverse order of removal.

Terminal

Voltage

(Approx.)

(+)

(-)

BCM connector

Terminal

M1

17

Ground

5.0 V

SKIA5894E

SKIB4159E

LT-134

ACTIVE AFS

ACTIVE AFS

PFP:253C0

Component Parts and Harness Connector Location

NKS003QE

System Description

NKS003QF

AFS control unit controls AFS and headlamp auto aiming.
The following signals are input to AFS control unit via CAN communication:

●

Steering angle sensor signal

●

A/T position indicator signal

●

Low beam status signal

●

Vehicle speed signal

●

Engine speed signal

Other signals are input as follows:

●

AFS switch signal from AFS switch connected to AFS control unit

PKID0502E

ACTIVE AFS

LT-135

C

D

E

F

G

H

I

J

L

M

A

B

LT

●

Height sensor signal from height sensor connected to AFS control unit

●

Swivel position sensor signal from swivel position sensor built into both right and left swivel actuators con-
nected to AFS control unit

In response to the state of control, AFS control unit switches commands of AFS off indicator signal sent to uni-
fied meter and A/C amp. via CAN communication; and then turns on/off or blinks AFS off indicator lamp built in
the combination meter.

AFS (ADAPTIVE FRONT-LIGHTING SYSTEM)

AFS increases viewability of cornering direction by changing light axis automatically to the direction of travel
with low beam headlamps during vehicle's cornering.
AFS switch allows AFS function to be stopped.
AFS control unit determines the current vehicle conditions by each received signals, and sends commands to
the low beam headlamp to swivel. With the headlamps (HIGH/LOW) illuminated, the AFS switch on, engine
running and the A/T select lever in any position but range P or range R, the low beam headlamps are opera-
tive by AFS control unit commands.
As the steering wheel is turned to the left (right), the left (right) low beam headlamp will automatically swivel
angle in accordance with the steering angle and vehicle speed, and stop the operation when the steering
wheel is returned to the straight-ahead position.
Swivel operation allows drive signal to be sent to the swivel actuator on the side that AFS control unit is actu-
ated. Step motor built in swivel actuator adjusts low beam projector of headlamp to swivel angle that matches
drive signal. Swivel position sensor built in swivel actuator detects swivel angle and transmits a swivel position
sensor signal to the AFS control unit. AFS control unit monitors if swivel operation is performed normally via
swivel position sensor signal. 

●

Swivel operation

*1: Included high beam illuminated.
*2: The swivel operates when running at approx. 25 km/h (15.5 MPH). When swivel operation is started, it works on until vehicle
stops.
*3: The low beam headlamps perform small movements when AFS control unit detects start of the engine. This is normal with ini-
tialization of swivel actuator by AFS control unit.

Low beam

status

A/T selector 

lever position

Vehicle speed

AFS switch

Engine speed 

Low beam 

headlamp LH 

(swivel)

Low beam 

headlamp RH 

(swivel)

Left turn

 Illuminated*

1

Except P, R

Running*

2

ON

While engine 

running*

3

×

Right turn

 Illuminated*

1

Except P, R

Irrespective

ON

While engine 

running*

3

×

LT-136

ACTIVE AFS

HEADLAMP AUTO AIMING

Headlamp auto aiming control automatically corrects vertical deviation of light axis that is brought by the
change of vehicle height with changing number of passenger and laden weight, and relieves dazzle to oncom-
ing vehicles.
AFS control unit determines the current vehicle conditions by each received signals, and sends commands to
the low beam headlamps to auto aiming. With the headlamps (HIGH/LOW) illuminated and engine running,
the low beam headlamps are operative by AFS control unit commands.
The height sensor is located on the left side of the rear suspension member and detects rear vehicle height
change by sensing the displacement of the rear suspension arm. And transmits a height sensor signal to the
AFS control unit.
With reference to the rear vehicle height under the empty condition, light axis of low beam with low rear vehi-
cle height is relatively higher than that with the empty condition. AFS control unit switches drive signal corrects
height of low beam axis to maintain height of light axis with empty condition.
Light axis of low beam with high rear vehicle height is relatively lower than that with empty condition. Light axis
of low beam with empty condition is set as upper limit of headlamp auto aiming control operation. Control to
correct deviation is not performed when light axis of low beam gets relatively higher than that with empty con-
dition. Timing of control is switched in accordance with driving conditions.

●

Headlamp auto aiming operation

*1: Included high beam illuminated
*2: Control timing of drive signal is switched by vehicle speed and accelerating/decelerating vehicle.
*3: Control is performed without regard to the condition of AFS switch. Headlamp auto aiming control function cannot be cancelled.

OUTLINE

Power is supplied
When the ignition switch is ON or START position, power is supplied

●

through 10A fuse [No.12, located in fuse block (J/B)]

●

to AFS control unit terminal 1

●

to front combination lamp LH and RH terminal 13

●

to AFS switch terminal 1

●

to unified meter and A/C amp. terminal 53.

Ground is supplied

●

to AFS control unit terminal 25

●

through grounds M16 and M70,

●

to front combination lamp LH and RH terminal 11

●

through grounds E22 and E43.

SKIB4707E

Operating range 

With 18-inch wheel (Reference value)

With 19-inch wheel (Reference value)

Vehicle height

A

0 mm (Standard position)

0 mm (Standard position)

Unloaded vehicle position

B

Approx. 200 mm (7.9 in)

Approx.180 mm (7.1 in)

Low

Low beam status

Vehicle speed

Engine speed

AFS switch

Illuminated*

1

Control switch by driving conditions*

2

While engine running

Irrespective*

3