Nissan Leaf. Manual - part 603

COMPONENT PARTS

EXL-13

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

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Hazard Switch

INFOID:0000000010121316

Inputs the hazard switch ON/OFF signal to BCM.

JMLIA2580GB

EXL-14

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

SYSTEM

SYSTEM

HEADLAMP SYSTEM
HEADLAMP SYSTEM : System Description

INFOID:0000000010121317

SYSTEM DIAGRAM

OUTLINE

Headlamp is controlled by combination switch reading function and headlamp control function of BCM, and

relay control function of IPDM E/R.

HEADLAMP (LO) OPERATION 

• BCM detects the combination switch condition with the combination switch reading function.

• BCM transmits the low beam request signal to IPDM E/R with 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 lamp switch ON and the power switch ON 

- Lighting switch PASS

• IPDM E/R turns integrated headlamp low relay ON according to low beam request signal and supplies

power supply to LED headlamp control module.

• LED headlamp control module turns the headlamp (LO) ON according to the power supply from IPDM E/R.

HEADLAMP (HI) OPERATION

• BCM transmits the high beam request signal to IPDM E/R and the combination meter with 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 switch ON, the power 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 WARNING LAMP OPERATION

• LED headlamp control module outputs the headlamp warning lamp signal to combination meter when the

following malfunction is detected:

- LED

- LED headlamp control module

- Circuit between LED headlamp control module and LED.

- Circuit between LED headlamp control module and combination meter.

JMLIA1517GB

SYSTEM

EXL-15

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

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• Combination meter turn the headlamp warning lamp ON according to the headlamp waning lamp signal

inputs.

NOTE:

Headlamp LO may turn ON while headlamp warning lamp is turned ON, because 2 pieces of LED are used so

that headlamp may continuously turn ON even if one of LED is not operative.

HEADLAMP SYSTEM : Fail-Safe

INFOID:0000000010121318

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

AUTO LIGHT SYSTEM (EXCEPT FOR CANADA)
AUTO LIGHT SYSTEM (EXCEPT FOR CANADA) : System Description

INFOID:0000000010121319

SYSTEM DIAGRAM

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.

Control part

Fail-safe operation

Headlamp

• Turns ON the headlamp low relay when the power switch is turned ON
• Turns OFF the headlamp low relay when the power switch is turned OFF
• Headlamp high relay OFF

JMLIA1254GB

EXL-16

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

SYSTEM

- When auto light system turns the exterior lamps ON with the power 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, tail lamp, front fog lamp and side marker 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. Refer to 

BCS-17, "HEADLAMP : CONSULT 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 power switch is turned ON or ACC.

• Optical sensor converts outside brightness (lux) to voltage and transmits the optical sensor signal to BCM.

• BCM filters outside brightness based on the optical sensor signal and judges outside brightness.

• BCM detects change status of outside brightness according to outside brightness from the optical sensor

signal and filtered outside brightness. Based on the change status, BCM judges ON/OFF condition of the

exterior lamp.

• BCM transmits each request signal to IPDM E/R and combination meter 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. Refer

to 

BCS-17, "HEADLAMP : CONSULT Function (BCM - HEAD LAMP)"

.

WIPER LINKED AUTO LIGHTING FUNCTION

BCM turns the exterior lamps 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 ON

⇒OFF.

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, lighting switch 2ND or lighting switch AUTO is

operated. Refer to 

INL-12, "AUTO LIGHT ADJUSTMENT SYSTEM : System Description"

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DELAY TIMER FUNCTION

BCM turns the exterior lamps OFF depending on the vehicle condition with the auto light function when the

power switch is turned OFF.

• Turns the exterior lamps OFF 5 minutes after detecting that any door opens. (Door switch ON).

• Turns the exterior lamps OFF a certain period of time* after closing all doors. (Door switch ON

→OFF).

• Turns the exterior lamps OFF with the power switch ACC or the light switch OFF.

*: The preset time is 45 seconds. The timer operating time can be set by CONSULT. Refer to 

BCS-17, "HEAD-

LAMP : CONSULT 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.

FOG OVERRIDE FUNCTION

When front fog lamp switch is ON while power switch is in ON position and lighting switch is in AUTO position,

BCM turns ON exterior lamps* regardless of outside brightness.

*: Headlamp (LO/HI), front fog lamp, parking lamp, license plate lamp, side marker lamp and tail lamp.

NOTE:

• Headlamp (HI) depending on the combination switch condition.

• Front fog light reminder warning is cancelled when fog override function is Off.

How to Set

With CONSULT

1. Turn power switch ON.

2. Select “INT LAMP” of “BCM” using CONSULT.

3. Select “FOG LAMP OVERRIDE” in “Work Support” mode.