Infiniti QX56 (Z62). Manual - part 680

 

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Infiniti QX56 (Z62). Manual - part 680

 

 

EXL-12

< SYSTEM DESCRIPTION >

[XENON TYPE]

SYSTEM

• BCM transmits each request signal to IPDM E/R with CAN communication according to ON/OFF condition

by the auto light function.

NOTE:
ON/OFF timing differs based on the sensitivity 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/brightens 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 after 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 ignition switch ACC or the light switch OFF.
*: The preset time is 45 seconds. The timer operating 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 Description (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 turns ON/OFF the exterior lamps* and each illumination

when the light switch is in the AUTO position, 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 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.)
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 condition 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 outside 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). 

SYSTEM

EXL-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 settings. The settings can be changed with CONSULT-III.
Refer to 

EXL-23, "HEADLAMP : CONSULT-III Function (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 (Twilight 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 switch 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 sensor), BCM decreases the filtered brightness by 20
lx

*

.When the filtered brightness is lower than outside brightness, 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 decreases/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

EXL-14

< SYSTEM DESCRIPTION >

[XENON TYPE]

SYSTEM

AUTO LIGHT ADJUSTMENT SYSTEM

The auto light adjustment system automatically, dims/brightens 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 after 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 ignition switch ACC or the light switch OFF.
*: The preset time is 45 seconds. The timer operating 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 SYSTEM : System Diagram

INFOID:0000000006214028

DAYTIME RUNNING LIGHT SYSTEM : System Description

INFOID:0000000006214029

OUTLINE

• Turns the front fog lamp ON as the daytime running light.
• Daytime running light is controlled by daytime running light control function and combination switch reading

function of BCM, and relay control function of IPDM E/R.

DAYTIME RUNNING LIGHT OPERATION 

• BCM detects the combination switch condition 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

SYSTEM

EXL-15

< SYSTEM DESCRIPTION >

[XENON TYPE]

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ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM : System Diagram

INFOID:0000000006213899

ACTIVE ADAPTIVE FRONT-LIGHTING SYSTEM : System Description

INFOID:0000000006213900

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 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 necessary 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 control 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 initialization when detecting that the engine starts.

JMLIA1077GB

 

 

 

 

 

 

 

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