2011 INFINITI QX56 sensor

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
< SYSTEM DESCRIPTION > [XENON TYPE]
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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

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

SYSTEMEXL-17
< SYSTEM DESCRIPTION > [XENON TYPE]
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ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM : Fail-SafeINFOID:0000000006422028
HEADLAMP AIMING CONTROL (MANUAL)
DTC Fail-safe AFS OFF indicator lamp Cancellation
U1000: CAN COMM CIRCUIT  Right and left swivel motors
stop at the position when DTC
is detected.
 Right and left aiming motors stop at the position when DTC
is detected. Blinks 1 second each. Ignition switch OFF
U1010: CONTROL UNIT (CAN)  Right and left swivel motors
stop at the position when DTC
is detected.
 Right and left aiming motors
stop at the position when DTC
is detected. Blinks 1 second each. Ignition switch OFF
B2503: SWIVEL ACTUATOR [RH]  Right swivel motors stop at the
position when DT C is detected.
 The signal, approximately 2 V
decreased from the levelizer
signal when DTC detected, is
output. Blinks 1 second each. Ignition switch OFF
B2504: SWIVEL ACTUATOR [LH]  Left swivel motors stop at the
position when DT C is detected.
 The signal, approximately 2 V decreased from the levelizer
signal when DTC detected, is
output. Blinks 1 second each. Ignition switch OFF
B2513: HI SEN UNUSUAL [FR]  Right and left aiming motors
stop at the position when DTC
is detected. — Ignition switch OFF
B2514: HI SEN UNUSUAL [RR]  Right and left aiming motors
stop at the position when DTC
is detected. — Ignition switch OFF
C0126: ST ANG SEN SIG  Right and left swivel motor
swivel angle returns to 0 ° and
fixed. Blinks 1 second each. Ignition switch OFF
B2516: SHIFT SIG [P, R]  Right and left swivel motor
swivel angle returns to 0 ° and
fixed. Blinks 1 second each. Ignition switch OFF
B2517: VEHICLE SPEED SIG  Right and left swivel motor
swivel angle returns to 0 ° and
fixed.
 Right and left aiming motors stop at the position when DTC
is detected. Blinks 1 second each. Ignition switch OFF
B2519: LEVELIZER CALIB  Right and left aiming motors
stop at the position when DTC
is detected. —
When the levelizer adjustment is
completed.
C0428: ST ANGLE SEN CALIB  Right and left swivel motor
swivel angle returns to 0 ° and
fixed. Blinks 1 second each.
When the steering angle sensor
neutral position registration is
competed.
B2521: ECU CIRC  Right and left swivel motors
stop at the position when DTC
is detected.
 Right and left aiming motors stop at the position when DTC
is detected. Blinks 1 second each. Ignition switch OFF
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)EXL-25
< SYSTEM DESCRIPTION > [XENON TYPE]
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ACTIVE TEST
*: Only models for Canada display this item.
FLASHER
FLASHER : CONSULT-III F unction (BCM - FLASHER)INFOID:0000000006213912
WORK SUPPORT
DOOR SW-DR
[On/Off] The switch status input from front door switch (driver side)
DOOR SW-AS
[On/Off] The switch status input from front door switch (passenger side)
DOOR SW-RR
[On/Off] The switch status input from rear door switch RH
DOOR SW- RL
[On/Off] The switch status input from rear door switch LH
DOOR SW-BK
[On/Off] The switch status input from back door switch
OPTICAL SENSOR
[On/Off] The sensor status input from optical sensor
OPTI SEN (DTCT)
[V] The value of outside brightness voltage input from the optical sensor
OPTI SEN (FILT)
[V] The value of outside brightness voltage filtered by BCM
Monitor item
[Unit] Description
Test item Operation Description
TAIL LAMP On
Transmits the position light request signal to IPDM E/R via CAN commu-
nication to turn the tail lamp ON
Off Stops the tail lamp request signal transmission
HEAD LAMP Hi
Transmits the high beam request signal via CAN communication to turn
the headlamp (HI)
Lo Transmits the low beam request signal via CAN communication to turn
the headlamp (LO)
Off Stops the high & low beam request signal transmission
FR FOG LAMP On
Transmits the front fog lights request signal to IPDM E/R via CAN com-
munication to turn the front fog lamp ON
Off Stops the front light request signal transmission
RR FOG LAMP On
NOTE:
This item is indicated, but can not tested
Off
DAYTIME RUNNING LIGHT* On
Transmits the front fog lights request signal to IPDM E/R via CAN com-
munication to turn the front fog lamp ON (daytime running light system)
Off Stops the front light request signal transmission (daytime running light
system)
ILL DIM SIGNAL On Transmits the dimmer signal to combination meter via CAN communi-
cation and dims combination meter
 Transmits the dimmer signal to AV control unit and dims display
Off Stops the dimmer signal transmission
Revision: 2010 May2011 QX56

EXL-32
< SYSTEM DESCRIPTION >[XENON TYPE]
DIAGNOSIS SYSTEM (AFS)
DIAGNOSIS SYSTEM (AFS)
CONSULT-III Function (ADAPTIVE LIGHT)INFOID:0000000006213915
APPLICATION ITEM
WORK SUPPORT
*: Adjusts the steering angle sensor neutral position on ABS actuator and electrical unit (control unit) side. Refer to
BRC-64, "Work Pro-
cedure".
DATA MONITOR
*: The swivel angle "0°" (feedback value) of the swivel position sensor signal may differ from the swivel angle "0 °" of the swivel motor
(AFS control unit command value). This causes that the swivel motor initializes the value based on the step number from the sto pper.
ACTIVE TEST
Diagnostic mode Description
Ecu Identification Allows confirmation of AFS control unit part number.
Self Diagnostic Result Displays the diagnosis results judged by AFS control unit.
Work support Sets each sensor.
Data monitor Indicates AFS control unit input data in real time.
Active test Provides the drive signal to the load. Checks operation.
Service item Description
ST ANG SEN ADJUSTMENT
*—
LEVELIZER ADJUSTMENT Adjusts the height sensor signal output value (AFS control unit recognized) in the un-
loaded vehicle condition.
Monitor item
[Unit] Description
STR ANGLS SIG
[deg] The steering angle value judged by the steering angle sensor signal received from
the steering angle sensor via CAN communication
VHCL SPD
[km/h] The vehicle speed signal value from the combination meter via CAN communication
SLCT LVR POSI
[P/R/N/D/M/FF] The selector lever status judged by the position indicator signal received from TCM
via CAN communication
HEAD LAMP
[On/Off] The headlamp On/Off status judged by the low beam headlamp (ON) signal received
from IPDM E/R via
CAN communication
AFS SW
[On/Off] The AFS On/Off status judged by AFS control unit
HI SEN OTP RR
[V] The rear height sensor signal voltage value input from the rear height sensor
HI SEN OTP FR
[V] The front height sensor signal voltage value input from the front height sensor
LEV ACTR VLTG
[%] The ratio value to the battery voltage generated by the levelizer activation signal con-
trol value judged by AFS control unit
SWVL SEN RH
*
[deg] The head lamp swivel angle value judged by AFS control unit received from the swiv-
el position sensor signal input from the swivel actuator
SWVL SEN LH
*
[deg]
SWVL ANGLE RH
*
[deg]
The swivel angle command value to the swivel motor judged by AFS control unit
SWVL ANGLE LH
*
[deg]
Revision: 2010 May2011 QX56