light INFINITI QX56 2011 Factory Service Manual

COMPONENT PARTSEXL-7
< SYSTEM DESCRIPTION > [XENON TYPE]
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*1: With headlamp aiming control system (manual) models
*2: With AFS system models
EXTERIOR LIGHTING SYSTEM : Component DescriptionINFOID:0000000006213888
1. Combination meter 2. BCM
Refer to BCS-4, "
BODY CONTROL
SYSTEM : Compon ent Parts Loca-
tion"
3. Optical sensor
4. IPDM E/R Refer to PCS-4, "
Component Parts
Location"
5. ECM
Refer to EC-16, "
Component Parts
Location"
6. Parking lamp
7. Front turn signal lamp 8. Front fog lamp 9. Headlamp
10. Front side marker lamp 11. Combination switch 12. Headlamp aiming switch*
1
13. Front door switch (driver side) 14.
Steering angle sensor*2
Refer to BRC-10, "Component Parts
Location"
15. License plate lamp
16. Tail lamp 17. Rear turn signal lamp 18. Rear side marker lamp
19. Hazard switch 20. Side turn signal lamp 21. Headlamp swivel actuator
22. Headlamp aiming motor 23. AFS switch*
224.Rear height sensor*2
25.AFS control unit*226.Front height sensor*2
A. Front combination lamp (back) B. View with instrument driver lower
panel (LH)C. Rear suspension member (RH)
D. View with instrument lower cover E. Front suspension arm (RH)
Part Description
BCM Controls the exterior lighting system.
ECM*
1Transmits engine speed signal to AFS control unit. (via CAN communication)
TCM*
1Transmits Shift position signal to AFS control unit. (via CAN communication)
IPDM E/R Controls the integrated relay, and supplies voltage to the load according to the request
from BCM (via CAN communication).
AFS control unit*
1AFS control unit judges the vehicle condition from each signal. AFS control unit con-
trols AFS function and the headlamp aiming.
Combination meter  Outputs the vehicle speed signal (8-pulse) to AFS control unit.
 Blinks the turn signal indicator lamp and outputs the turn signal operating sound with
integrated buzzer according to the request from BCM (via CAN communication).
 Turns the tail lamp indicator lamp and high beam indicator lamp ON according to the
request from BCM (via CAN communication).
 Turns the AFS OFF indicator lamp ON/OFF /blinking according to the request from
AFS control unit (via CAN communication).
Headlamp assembly Xenon bulb Refer to
EXL-8, "
FRONT COMBINATION LAMP : Xenon Headlamp".
HID control unit Refer to EXL-9, "
FRONT COMBINATION LAMP : HID control unit".
High beam solenoid Refer to EXL-9, "
FRONT COMBINATION LAMP : High Beam Solenoid".
Aiming motor Refer to EXL-9, "
FRONT COMBINATION LAMP : Aiming Motor".
Swivel actuator*
1Refer to EXL-9, "FRONT COMBINATION LAMP : Swivel Actuator".
Height sensor*
1
 The height sensor is installed to the front suspension member and rear suspension member.
 The height sensor detects the suspension arm displacement as the vehicle height change.
 The height sensor transmits the height sensor signal to AFS control unit.
NOTE:
The sensor angle of the unloaded vehicle position is the reference value.
Optical sensor Optical sensor converts the outside brightness (lux) to voltage and transmits the opti-
cal sensor signal to BCM.
Revision: 2010 May2011 QX56

EXL-8
< SYSTEM DESCRIPTION >[XENON TYPE]
COMPONENT PARTS
*1: With AFS system models
*
2: With headlamp aiming control system (manual) models
FRONT COMBINATION LAMP
FRONT COMBINATION LAMP : Xenon HeadlampINFOID:0000000006213889
OUTLINE
 The lamp light source is by the arch discharge by
applying high voltage into the xenon gas-filled bulb instead
of the halogen bulb filament.
 Sight becomes more natural and brighter because the amount of light are gained adequately and the color of
light is sunshine-like white.
 The xenon bulb drops the amount of light, repeats blinking, and illuminates in red if the bulb reaches the ser-
vice life.
ILLUMINATION PRINCIPLE
1. Discharging starts in high voltage pulse between bulb elec- trodes.
2. Xenon gas is activated by curr ent between electrodes. Pale light
is emitted.
3. The luminous tube (bulb) temperature elevates. Evaporated halide is activated by discharge. The color of light changes into
white.
NOTE:
 Brightness and the color of light may change slightly immediately after the headlamp turned ON until the xenon bulb becomes sta-
ble. This is not malfunction.
 Illumination time lag may occur between right and left. This is not
malfunction.
PRECAUTIONS FOR TROUBLE DIAGNOSIS
Representative malfunction examples are; "Light does not turn ON", "Light blinks", and "Brightness is inade-
quate." The cause often be the xenon bulb. Such malf unctions, however, are occurred occasionally by HID
control unit malfunction or lamp case malfunction. S pecify the malfunctioning part with diagnosis procedure.
WARNING:
 Never touch the harness, HID control unit, the inside and metal part of lamp when turning the head-
lamp ON or operating the lighting switch.
 Never work with wet hands.
CAUTION:
 Never perform HID control unit circuit diagnosis with a circuit tester or an equivalent.
 Temporarily install the headlamps on the vehicle. Co nnect the battery to the connector (vehicle side)
when checking ON/OFF status.
 Disconnect the battery negative terminal before di sconnecting the lamp socket connector or the har-
ness connector.
 Check for fusing of the fusible link(s), open around connector, short, disconnection if the symptom
is caused by electric error.
NOTE:
 Turn the switch OFF once before turni ng ON, if the ON/OFF is inoperative.
 The xenon bulb drops the amount of light, repeats blinking, and illuminates in red if the bulb reaches the ser-
vice life.
Steering angle sensor*1Transmits steering angle sensor signal to AFS control unit. (via CAN communication)
Combination switch
(Lighting & turn signal switch) Refer to
BCS-7, "
COMBINATION SWITCH READING SYSTEM : System Descrip-
tion".
Door switch Inputs the door switch signal to BCM.
AFS switch*
1 Inputs the AFS switch signal to AFS control unit.
 AFS switch is integrated in triple switch.
Headlamp aiming switch*
2Outputs the aiming motor drive signal to aiming motor.
Hazard switch Inputs the hazard switch signal to BCM. Part Description
JPLIA0421GB
Revision: 2010 May2011 QX56

COMPONENT PARTSEXL-9
< SYSTEM DESCRIPTION > [XENON TYPE]
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FRONT COMBINATION LAMP : HID control unitINFOID:0000000006213890
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-8, "
FRONT COMBINATION LAMP :
Xenon Headlamp".
FRONT COMBINATION LAMP : High Beam SolenoidINFOID:0000000006213891
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.
FRONT COMBINATION LAMP : Aiming MotorINFOID:0000000006213892
The headlamp levelizer adjusts the headlamp light axis upward and downward with the aiming motor inte-
grated in the front combination lamp.
FRONT COMBINATION LAMP : Swivel ActuatorINFOID:0000000006213893
SWIVEL ACTUATOR
The swivel actuator is installed in the headlamp unit. T he swivel actuator consists of the swivel motor and the
swivel position sensor.
SWIVEL MOTOR
 The swivel motor is the two-phase step motor.
 The swivel motor drives headlamp by exciting the two dr ive coils according to the drive signal from AFS con-
trol unit.
 The rotation direction of the swivel motor is changeable by changing the exciting pattern.
SWIVEL POSITION SENSOR
The swivel position sensor detects the headlamp swivel angle to transmit t he swivel position sensor signal to
AFS control unit.
JSLIA0129ZZ
Revision: 2010 May2011 QX56

EXL-10
< SYSTEM DESCRIPTION >[XENON TYPE]
SYSTEM
SYSTEM
HEADLAMP SYSTEM
HEADLAMP SYSTEM : System DiagramINFOID:0000000006213894
HEADLAMP SYSTEM : System DescriptionINFOID:0000000006213895
OUTLINE
Headlamp is controlled by combination switch r
eading function and headlamp control function of BCM, and
relay control function of IPDM E/R.
HEADLAMP (LO) OPERATION
 BCM detects the combination switch conditi on with the combination switch reading function.
 BCM transmits the low beam request signal to IPDM E/R via CAN communication according to the head-
lamp (LO) ON condition.
Headlamp (LO) ON condition- Lighting switch 2ND
- Lighting switch AUTO (auto light function ON judgment)
- Lighting switch AUTO, with the front fog la mp switch ON and the ignition switch ON
- Lighting switch PASS
 IPDM E/R turns the integrated headlamp low relay ON , and turns the headlamp ON according to the low
beam request signal.
HEADLAMP (HI) OPERATION
 BCM transmits the high beam request signal to IPDM E/R and the combination meter via CAN communica- tion according to the headlamp (HI) ON condition.
Headlamp (HI) ON condition
- Lighting switch HI with the lighting switch 2ND or AUTO (auto light function ON judgment)
- Lighting switch PASS
- Lighting switch AUTO, with the front fog lamp swit ch ON, the ignition switch ON and lighting switch HI
 Combination meter turns the high beam indicator lamp ON according to the high beam request signal.
 IPDM E/R turns the integrated headlamp high relay ON , and turns the headlamp ON according to the high
beam request signal.
HEADLAMP SYSTEM : Fail-safeINFOID:0000000006213896
CAN COMMUNICATION CONTROL
When CAN communication with BCM is impossible, IPDM E/R performs fail-safe control. After CAN communi-
cation recovers normally, it also returns to normal control.
If No CAN Communication Is Available With BCM
JMLIA1083GB
Revision: 2010 May2011 QX56

SYSTEMEXL-11
< SYSTEM DESCRIPTION > [XENON TYPE]
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*: With daytime running light system
AUTO LIGHT SYSTEM
AUTO LIGHT SYSTEM : System DiagramINFOID:0000000006213897
AUTO LIGHT SYSTEM : System Description (For CANADA)INFOID:0000000006218912
OUTLINE
 Auto light system is controlled by each function of BCM and IPDM E/R.
Control by BCM- Combination switch reading function
- Headlamp control function
- Auto light function
- Delay timer function
- Wiper linked auto lighting function
- Auto light adjustment system
Control by IPDM E/R
- Relay control function
 Auto light system has the auto light function, wiper linked auto lighting function and delay timer function.
- Auto light function automatically turns ON/OFF the exterior lamps* and each illumination automatically,
depending on the outside brightness.
- Wiper linked auto lighting function automatically tu rns ON/OFF the exterior lamps* and each illumination
when the light switch is in the AUTO posit ion, according to a front wiper operation.
- When auto light system turns the exterior lamps ON wit h the ignition switch OFF, delay timer function turns
the exterior lamps OFF, depending on the vehicle condition with the auto light function after a certain period
of time.
*: Headlamp (LO/HI), parking lamp, side marker lamp, tail lamp and front fog lamp (Headlamp HI and front fog
lamp depend on the combination switch condition.)
AUTO LIGHT FUNCTION
 BCM detects the combination switch conditi on with the combination switch reading function.
 BCM supplies voltage to optical sensor when the ignition switch is turned ON or ACC.
 Optical sensor converts outside brightness (lux) to voltage and transmits the optical sensor signal to BCM.
 BCM judges outside brightness from the optical sens or signal and judges ON/OFF condition of the exterior
lamp and each illumination according to the outside brightness.
Control part Fail-safe operation
Headlamp  Turns ON the headlamp low relay when the ignition switch is turned ON
 Turns OFF the headlamp low relay when the ignition switch is turned OFF
 Headlamp high relay OFF
JMLIA1254GB
Revision: 2010 May2011 QX56

EXL-12
< SYSTEM DESCRIPTION >[XENON TYPE]
SYSTEM
 BCM transmits each request signal to IPDM E/R wit
h CAN communication according to ON/OFF condition
by the auto light function.
NOTE:
ON/OFF timing differs based on the sensit ivity from the setting. The setting can be set by CONSULT-III. Refer
to EXL-23, "
HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)".
AUTO LIGHT ADJUSTMENT SYSTEM
The auto light adjustment system automatically, dims/bri ghtens the display and combination meter, according
to brightness outside the vehicle, when lighting switch 1ST or lighting switch 2ND is operated. Refer to INL-11,
"AUTO LIGHT ADJUSTMENT SYSTEM : System Description".
DELAY TIMER FUNCTION
BCM turns the exterior lamp OFF depending on the vehicle condition with the auto light function when the igni-
tion switch is turned OFF.
 Turns the exterior lamp OFF 5 minutes afte r detecting that any door opens. (Door switch ON).
 Turns the exterior lamp OFF a certain period of time* after closing all doors. (Door switch ON →OFF).
 Turns the exterior lamp OFF with the igni tion switch ACC or the light switch OFF.
*: The preset time is 45 seconds. The timer operat ing time can be set by CONSULT-III. Refer to EXL-23,
"HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)".
NOTE:
When any position other than the light switch AUTO is set, the auto light system function switches to the exte-
rior lamp battery saver function.
AUTO LIGHT SYSTEM : System De scription (Except for CANADA)INFOID:0000000006218908
OUTLINE
 Auto light system is controlled by each function of BCM and IPDM E/R.
Control by BCM- Combination switch reading function
- Headlamp control function
- Auto light function
- Delay timer function
- Wiper linked auto lighting function
- Auto light adjustment system
Control by IPDM E/R- Relay control function
 Auto light system has the auto light function (with twilight lighting function), wiper linked auto lighting function
and delay timer function.
- Auto light function automatically turns ON/OFF the exterior lamps* and each illumination automatically,
depending on the outside brightness.
- Wiper linked auto lighting function automatically turn s ON/OFF the exterior lamps* and each illumination
when the light switch is in the AUTO posit ion, according to a front wiper operation.
- When auto light system turns the exterior lamps ON with the ignition switch OFF, delay timer function turns the exterior lamps OFF, depending on the vehicle conditi on with the auto light function after a certain period
of time.
*: Headlamp (LO/HI), parking lamp, side marker lamp, tail lamp and front fog lamp (Headlamp HI and front fog
lamp depend on the combination switch condition.)
NOTE:
The settings of the twilight lighting function and the wiper linked auto lighting function can be changed with
CONSULT-III. Refer to EXL-23, "
HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)".
AUTO LIGHT FUNCTION (WITH TWILIGHT LIGHTING FUNCTION)
Description
 BCM detects the combination switch conditi on with the combination switch reading function.
 BCM supplies voltage to the optical sensor when the ignition switch is turned ON or ACC.
 Optical sensor converts outside brightness (lux) to voltage and transmits the optical sensor signal to BCM.
 When ignition switch is turned ON, BCM detects out side brightness from the optical sensor signal and
judges ON/OFF condition of the exterior lamp and each illumination, depending on the outside brightness
condition (standard or twilight).
Revision: 2010 May2011 QX56

SYSTEMEXL-13
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 BCM transmits each request signal to IPDM E/R via CAN communication, according to ON/OFF condition by
the auto light function.
NOTE:
As to ON/OFF timing, the sensitivity depends on sett ings. The settings can be changed with CONSULT-III.
Refer to EXL-23, "
HEADLAMP : CONSULT-III F unction (BCM - HEAD LAMP)".
Auto Lighting Timing Table
When the light switch is in AUTO position and the ignition switch is ON, the exterior lamps turns ON/OFF in the
following condition.
Standard Light ON
BCM turns exterior lamps ON when outside brightness obtained from the optical sensor signal is 1250 lx or
less for 3 seconds or more. And BCM turns exterior lamp OFF when outside brightness from the optical sen-
sor signal is 2500 lx or more for 5 seconds or more.
Twilight Light ON (Twili ght Lighting Function)
BCM detects twilight by filtered brightness.
 BCM filters outside brightness to block the impact of the rapid change in brightness, based on the optical
sensor signal, and judges outside brightness.
 BCM detects changes in outside brightness, based on outside brightness obtained from the optical sensor
signal and filtered brightness and judges ON/OFF of the exterior lamps.
Filtering chart
 BCM starts filtering 0.3 seconds after the ignition swit ch is turned ON and the light switch is turned to AUTO.
 BCM filters signals from the optical sensor at intervals of 2 seconds.When the filtered brightness is higher
than outside brightness (signal from the optical sens or), BCM decreases the filtered brightness by 20
lx
*.When the filtered brightness is lower than outside bri ghtness, BCM increases the filtered brightness by 20
lx
*.
 BCM turns ON the exterior lamps when filtered brightness reaches 3000 lx and turns OFF when reaching 5000 lx.
*:When vehicle speed is 5 km/h or less, BCM decr eases/increases the filtered brightness by 5 lx.
WIPER LINKED AUTO LIGHTING FUNCTION
BCM turns the exterior lamp ON when detecting 4 operations of the front wiper work the light switch in AUTO
position.
NOTE:
BCM turns OFF the headlamps 3 seconds after the front wiper switch is turned from HI⇒OFF.
Exterior lamps Standard Light ON
(Sudden increase/decrease in brightness) Twilight Light ON
(Gradual increase/decrease in brightness)
ON Outside brightness is 1250 lx or less for 3
seconds or more.Filtered brightness is 3000 lx or less
OFF Outside brightness is 2500 lx or more for 5
seconds or more.
Filtered brightness is 5000 lx or more
JPLIA1827GB
Revision: 2010 May2011 QX56

EXL-14
< SYSTEM DESCRIPTION >[XENON TYPE]
SYSTEM
AUTO LIGHT ADJUSTMENT SYSTEM
The auto light adjustment system automatically, dims/bri
ghtens the display and combination meter, according
to brightness outside the vehicle, when lighting switch 1ST or lighting switch 2ND is operated. Refer to INL-11,
"AUTO LIGHT ADJUSTMENT SYSTEM : System Description".
DELAY TIMER FUNCTION
BCM turns the exterior lamp OFF depending on the vehicle condition with the auto light function when the igni-
tion switch is turned OFF.
 Turns the exterior lamp OFF 5 minutes afte r detecting that any door opens. (Door switch ON).
 Turns the exterior lamp OFF a certain period of time* after closing all doors. (Door switch ON →OFF).
 Turns the exterior lamp OFF with the igni tion switch ACC or the light switch OFF.
*: The preset time is 45 seconds. The timer operat ing time can be set by CONSULT-III. Refer to EXL-23,
"HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)".
NOTE:
When any position other than the light switch AUTO is set, the auto light system function switches to the exte-
rior lamp battery saver function.
DAYTIME RUNNING LIGHT SYSTEM
DAYTIME RUNNING LIGHT S YSTEM : System DiagramINFOID:0000000006214028
DAYTIME RUNNING LIGHT SYSTEM : System DescriptionINFOID:0000000006214029
OUTLINE
 Turns the front fog lamp ON as the daytime running light.
 Daytime running light is controlled by daytime runni ng light control function and combination switch reading
function of BCM, and relay c ontrol function of IPDM E/R.
DAYTIME RUNNING LIGHT OPERATION
 BCM detects the combination switch conditi on by the combination switch reading function.
 BCM detects the vehicle condition depending on the following signals.
- Parking brake switch signal (received from combination meter via CAN communication)
 BCM transmits the front fog light request signal to IPDM E/R via 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
- Lighting switch OFF
- Lighting switch AUTO (auto light function OFF judgment)
- Passing switch OFF
- Front fog lamp switch OFF
 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.
ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM
JMLIA1078GB
Revision: 2010 May2011 QX56

SYSTEMEXL-15
< SYSTEM DESCRIPTION > [XENON TYPE]
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ACTIVE ADAPTIVE FRONT-LIGHTI NG SYSTEM : System DiagramINFOID:0000000006213899
ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM : System DescriptionINFOID:0000000006213900
OUTLINE
 AFS (ACTIVE ADAPTIVE FRONT-LIGHTING SY STEM) 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 unit controls the headlamp (right) only when the steering wheel is turned rightward, and the
headlamp (left) only when the steering wheel is turned leftward.
 AFS control unit detects the vehicle condition nec essary for AFS control with the following signals.
- AFS switch signal
- Vehicle speed signal (received from combination meter via CAN communication)
- Steering angle sensor signal (received from steering angle sensor via CAN communication)
- Shift position signal (received from TCM via CAN communication)
- Low beam status signal (received from IPDM E/R via CAN communication)
- Engine speed signal (received from ECM via CAN communication)
 When the operation conditions are satisfied, AFS c ontrol unit controls the swivel angle depending on the
steering angle and the vehicle speed.
AFS operation condition- Swivel actuator initialization completed
- AFS “ON”(AFS OFF indicator lamp “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.)
Swivel Actuator Initialization
 AFS control unit performs the swivel actuator in itialization when detecting that the engine starts.
JMLIA1077GB
Revision: 2010 May2011 QX56

EXL-16
< SYSTEM DESCRIPTION >[XENON TYPE]
SYSTEM
- Swivels the headlamp to the vehicle-center side until it hits the stopper.
- Returns the swivel angle from the stopper. Completes t
he 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 sw ivel 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 t he 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 strai ght-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 via 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 turns ON when AFS is switched to “OFF” by operating AFS switch.
- 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
 AFS control unit controls the headl amp light axis height appropriately according to the vehicle height.
 AFS control unit detects the vehicle condition necessa ry for headlamp auto aiming control with the following
signals.
- Height sensor signals (front and rear)
- Vehicle speed signal (received from combination meter via CAN communication)
- Low beam status signal (received from IPDM E/R via CAN communication)
- Engine speed signal (received from ECM via CAN communication)
 When the operation conditions are satisfied, AFS cont rol 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 fr om the front and rear height sensor signal. AFS control
unit judges the angle for adjusting the axis gap from the preset position.
 AFS control unit controls the headlamp axis by c hanging the aiming motor drive signal output according to
the front and rear vehicle height when detecting the follo wing vehicle condition. Output is maintained if other
condition than following is detected.
- Engine starts.
- Headlamp is turned ON.
- Vehicle posture becomes stable after changing the v ehicle posture change is detected with the headlamp
ON and the vehicle stopped.
- Vehicle speed is maintained with the headlamp ON and the vehicle driven.
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.
Revision: 2010 May2011 QX56