Nissan X-Trail 32. Manual - part 1142

 

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Nissan X-Trail 32. Manual - part 1142

 

 

SYSTEM

EXL-25

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

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Control by BCM

- Combination switch reading function
- Auto light function
- Fog override function

Control by IPDM E/R

- Smart FET control function
• Auto light system has the auto light function and fog override function.
- Auto light function automatically turns ON/OFF the exterior lamps*, depending on the outside brightness.
- Fog override function turns ON the exterior lamps regardless of outside brightness, when front fog lamp

switch is turned from OFF to ON or rear fog lamp switch is turned from OFF to ON while ignition switch is in
ON position and lighting switch is in AUTO position.

*: Headlamp (LO/HI), front fog lamp, rear fog lamp, parking lamp, license plate lamp and tail lamp.
NOTE:
• Headlamp (HI) depend on the combination switch condition and the illumination judgment of high beam

assist system. For details, refer to 

EXL-27, "HIGH BEAM ASSIST SYSTEM : System Description"

.

• Front fog lamp does not turn ON automatically, but automatically turns OFF (only when the fog override

function setting is OFF).

• Rear fog lamp does not turn ON automatically, but automatically turns OFF (only when the fog override func-

tion setting is OFF).

AUTO LIGHT FUNCTION

• BCM detects the combination switch condition with the combination switch reading function.
• BCM detects the engine condition by the engine status signal received from ECM via CAN communication.
• BCM receives exterior lamp ON/OFF requests from the light & rain sensor by light & rain sensor serial link.
• BCM judges the ON/OFF status of the exterior lamp according to ON/OFF requests from light & rain sensor

and the vehicle condition.

• BCM transmits each request signal to IPDM E/R via 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. Refer to

EXL-55, "HEADLAMP : CONSULT Function (BCM - HEAD LAMP) (LED Headlamp)"

.

FOG OVERRIDE FUNCTION

When front fog lamp switch is turned from OFF to ON or rear fog lamp switch is turned from OFF to ON while
ignition switch is in ON position and lighting switch is in AUTO position, BCM turns ON exterior lamps* regard-
less of outside brightness.
*: Headlamp (LO/HI), front fog lamp, rear fog lamp, parking lamp, license plate lamp and tail lamp.
NOTE:
• Headlamp (HI) depend on the combination switch condition and the illumination judgment of high beam

assist system. For details, refer to 

EXL-27, "HIGH BEAM ASSIST SYSTEM : System Description"

.

• Front fog lamp and rear fog lamp depend on the each fog lamp switch operation.
• ON/OFF of fog override function can be changed using CONSULT. Refer to 

INL-21, "INT LAMP : CONSULT

Function (BCM - INT LAMP)"

.

EXL-26

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

SYSTEM

AUTO LIGHT SYSTEM : Circuit Diagram

INFOID:0000000010788751

HIGH BEAM ASSIST SYSTEM

JMLIA5512GB

SYSTEM

EXL-27

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

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HIGH BEAM ASSIST SYSTEM : System Description

INFOID:0000000011008904

SYSTEM DIAGRAM

OUTLINE

• High beam assist system is a system that can reduce the driver's switch operation load. The system auto-

matically switches the headlamp to the low beam mode when a vehicle ahead or an oncoming vehicle
appears, while driving the vehicle with the headlamps in high beam mode at night.

• When the high beam assist system operation permission conditions are satisfied, the high beam assist indi-

cator lamp in the combination meter turns ON and informs that the high beam assist is in operation.

• High beam assist system is controlled by each function of BCM, front camera unit and IPDM E/R.

Control by BCM

- Combination switch reading function
- Auto light function
- High beam assist control function
- Headlamp control function

Control by IPDM E/R

- Smart FET control function

Control by Front camera unit

- High beam assist control function

OPERATION DESCRIPTION

• BCM detects the combination switch condition with the combination switch reading function.
• BCM transmits the high beam assist indicator lamp signal to the combination meter via CAN communication,

when the high beam assist system operation permission conditions are satisfied.

High beam assist system operation permission conditions

- Lighting switch HI with the lighting switch AUTO and ignition switch ON (Only when the illuminating judgment

by auto light function is ON. For details, refer to 

EXL-24, "AUTO LIGHT SYSTEM : System Description"

.)

• Combination meter turns the high beam assist indicator lamp ON according to the high beam assist indicator

lamp signal.

• Front camera unit detects the vehicle status and ambient status that are required for high beam assist con-

trol with the following signals.

- Vehicle speed signal (received from combination meter via CAN communication)
- Ambient light signal (detect from front camera unit)
- Image sensor signal (detect from front camera unit)
• Front camera unit judges the current recommended beam according to the vehicle status and ambient con-

dition, and transmits the high beam assist request signal (headlamp HI operation / headlamp LO operation)
to BCM via CAN communication.

• BCM switches the headlamp LO operation / headlamp HI operation according to high beam assist request

signal, while the high beam assist system operation permission conditions are satisfied. For headlamp oper-
ation, refer to 

EXL-21, "HEADLAMP SYSTEM : System Description"

.

RECOMMENDED BEAM JUDGMENT BY FRONT CAMERA UNIT

JMLIA5229GB

EXL-28

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

SYSTEM

Headlamp HI Operation Request

Front camera unit requests the headlamp HI operation to BCM when all of following conditions are satisfied.
• Detects the vehicle speed is approx. 40 km/h or more.
• Recognizes the ambient condition is dark.
• Recognizes there is no oncoming vehicle or no vehicle ahead in front of the vehicle.

Headlamp LO Operation Request

Front camera unit requests the headlamp LO operation to BCM when either of following conditions is satisfied.
• Detects the vehicle speed is approx. 30 km/h or less.
• Recognizes the ambient condition is bright.
• Recognizes there is oncoming vehicle or vehicle ahead in front of the vehicle.

 

 

 

 

 

 

 

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