Nissan Leaf. Manual - part 602

PREPARATION

EXL-9

< PREPARATION >

[LED HEADLAMP]

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PREPARATION

PREPARATION

Special Service Tool

INFOID:0000000010121311

The actual shape of the tools may differ from those illustrated here.

Tool number
(TechMate No.)
Tool name

Description

—

(J-46534)
Trim Tool Set

Removing trim components

AWJIA0483ZZ

EXL-10

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

COMPONENT PARTS

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

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A.

Front combination lamp (back)

No.

Part

Function

1.

IPDM E/R

• Controls the integrated relay, and supplies voltage to the load according to the re-

quest from BCM (via CAN communication).

• Refer to 

PCS-6, "Component Parts Location"

 for detailed installation location.

2.

Combination switch
(Lighting & turn signal switch)

Refer to 

BCS-8, "COMBINATION SWITCH READING SYSTEM : System Descrip-

tion"

.

3.

Combination meter

• Blinks the turn signal indicator lamp and outputs the turn signal operating sound 

with integrated buzzer according to the request from BCM (via CAN communica-
tion).

• Turns the tail lamp indicator lamp, high beam indicator lamp, front fog lamp indi-

cator lamp and rear fog lamp indicator lamp ON according to the request from 
BCM (via CAN communication).

• Inputs headlamp warning lamp signal from LED headlamp control module and 

turns headlamp warning lamp ON.

4.

Hazard switch

Refer to 

EXL-13, "Hazard Switch"

.

ALLIA1267ZZ

COMPONENT PARTS

EXL-11

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

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*: With daytime running light system

LED Headlamp

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OUTLINE

• Semiconductor device (Light emitting diode: LED), which is illuminated when forward bias electric voltage is

applied, is adopted as the source of light instead of halogen bulb or xenon bulb. 

• Comparing to halogen headlamp or xenon headlamp, LED headlamp is electrically power saving, durable,

and is illuminated in the similar color to the sunlight. Bright, natural, and eye-friendly visibility can be

obtained.

ILLUMINATION PRINCIPLE

White LED emits the white light through fluorescent substance on luminescent surface of blue LED using

semiconductor (joint construction of P type and N type).

5.

BCM

• Detects each switch condition by the combination switch reading function
• Judges that the exterior lamps are turned ON according to the vehicle condition
• Requests the headlamp relay (HI/LO), tail lamp relay and front fog lamp relay ON 

to IPDM E/R (via CAN communication)

• Requests the high beam indicator lamp, tail lamp indicator lamp and front fog 

lamp indicator lamp ON to the combination meter (via CAN communication)

• Judges the outside brightness from the optical sensor signal.
• Judges the ON/OFF timing according to the vehicle condition.
• Judges the ON/OFF status of the exterior lamp according to the outside bright-

ness and the vehicle condition.

• Refer to 

BCS-5, "BODY CONTROL SYSTEM : Component Parts Location"

 for 

detailed installation location.

6.

Optical sensor 

Refer to 

EXL-12, "Optical Sensor"

.

7.

Front side marker lamp

Refer to 

EXL-149, "Bulb Specifications"

.

8.

Front turn signal lamp

Refer to 

EXL-149, "Bulb Specifications"

.

9.

Headlamp LO (LED headlamp)

Refer to 

EXL-14, "HEADLAMP SYSTEM : System Description"

.

10.

Headlamp HI

Refer to 

EXL-149, "Bulb Specifications"

.

11.

Parking Lamp

Refer to 

EXL-149, "Bulb Specifications"

.

12.

Front fog lamp (if equipped)

Refer to 

EXL-149, "Bulb Specifications"

.

13.

Daytime running light relay* 

Headlamp HI ground circuit is switched according to request from IPDM E/R.

14.

Front door switch (LH)

Refer to 

DLK-20, "Door Switch"

.

15.

Rear side marker lamp

Refer to 

EXL-149, "Bulb Specifications"

.

16.

Tail lamp

Refer to 

EXL-149, "Bulb Specifications"

.

17.

Rear turn signal lamp

Refer to 

EXL-149, "Bulb Specifications"

.

18.

License plate lamp

Refer to 

EXL-149, "Bulb Specifications"

.

19.

LED headlamp control module

Refer to 

EXL-12, "LED Headlamp Control Module"

.

No.

Part

Function

JMLIA1755GB

EXL-12

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

COMPONENT PARTS

1. When forward bias electric voltage is applied to LED, hole (positive characteristics) and electron (negative

characteristics) move toward each electrode, and electric current flows.

2. Hole and electron move inside of semiconductor crystal and are connected (re-connection) again at con-

necting portion. A part of energies that is produced at this moment is emitted as the light.

PRECAUTIONS FOR TROUBLE DIAGNOSIS

Representative malfunction examples are; “Light does not turn ON”, “Light blinks”, and “Brightness is inade-

quate.” Such malfunctions, however, occasionally by occur LED control module malfunction or lamp case mal-

function. Specify the malfunctioning part with diagnosis procedure. 

CAUTION:

• Never touch the harness, LED headlamp control module, the inside and metal part of lamp when

turning the headlamp ON or operating the lighting switch, for preventing electrical shock. 

• Never work with wet hands, for preventing electrical shock.

• Never perform LED headlamp control module circuit diagnosis with a circuit tester or an equivalent.

• Temporarily install the headlamps on the vehicle. Always connect power supply to the connector

(vehicle side) when checking ON/OFF status.

• Disconnect the 12V battery negative terminal before disconnecting the lamp socket connector or the

harness connector. Refer to 

EXL-8, "Precaution for Removing 12V Battery"

.

• Check for fusing of the fusible link(s), open around connector, short, disconnection if the symptom

is caused by electric error.

• Always check for deformation or hole of headlamp housing and engagement of bulb cover. Other-

wise, water may enter into headlamp because of damage of headlamp housing and contact to LED

headlamp control module connector. The normal operation may be inhibited when short circuit to

power supply is detected.

NOTE:

Turn the switch OFF once before turning ON, if the ON/OFF is inoperative.

LED Headlamp Control Module

INFOID:0000000010121314

• Headlamp (LO) circuit is connected to LED headlamp control mod-

ule integrated in the front combination lamp.

• Headlamp (LO) circuit turns LED headlamp ON.

• Outputs the headlamp warning lamp signal to the combination

meter.

Optical Sensor

INFOID:0000000010121315

Optical sensor converts the outside brightness (lux) to voltage and

transmits the optical sensor signal to BCM.

JMLIA2393ZZ

JMLIA2581GB