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Nissan Qashqai J11. Manual - part 1679

SYSTEM

EXL-17

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

EXL

SYSTEM

HEADLAMP SYSTEM

HEADLAMP SYSTEM : System Description

INFOID:0000000010338642

SYSTEM DIAGRAM

OUTLINE

Headlamp is controlled by combination switch reading function and headlamp control function of BCM, and
smart FET 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 and the combination meter with CAN communica-

tion according to the headlamp (LO) ON condition.

Headlamp (LO) ON condition (When any of the following conditions are satisfied)

- Lighting switch 2ND
- Lighting switch AUTO (Only when the illumination judgment by auto light system is ON. For details, refer to

EXL-19, "AUTO LIGHT SYSTEM : System Description"

- Lighting switch PASS
• IPDM E/R turns the integrated smart FET ON according to low beam request signal and supplies power sup-

ply to LED headlamp control module.

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 (When any of the following conditions are satisfied)

- Lighting switch HI with the lighting switch 2ND
- Lighting switch HI with the lighting switch AUTO (Only when the illumination judgment by auto light system is

ON and the illumination judgment by high beam assist system is ON. For details, refer to

EXL-19, "AUTO

LIGHT SYSTEM : System Description"

- Lighting switch PASS

JMLIA5227GB

EXL-18

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

SYSTEM

• IPDM E/R turns the integrated headlamp high smart FET ON according to high beam request signal and

supplies power supply to LED headlamp control module.

• LED headlamp control module turns the headlamp (HI) ON according to the power supply from IPDM E/R.
• Combination meter turns the high beam indicator lamp ON according to the high beam request signal.

HEADLAMP WARNING OPERATION

• BCM transmits the low beam request signal to IPDM E/R with CAN communication when headlamp (LO) ON

judgment.

• When LED headlamp control module detects a malfunction of headlamp (LO) circuit, headlamp warning sig-

nal is output to IPDM E/R.

• When the IPDM E/R receives the low beam request signal and the headlamp warning signal is input, it trans-

mits the headlamp warning signal (CAN communication) to the combination meter.

• When the ignition switch is ON and the combination meter receives the headlamp warning signal, the combi-

nation meter displays the headlamp warning on the vehicle information display.
NOTE:
When the headlamp warning signal is received, the most likely cause is a malfunction of the following.
• Headlamp (LO) power supply/ground circuit
• Headlamp warning signal circuit
• Front combination lamp internal circuit
- LED (Headlamp low)
- LED headlamp control module
- Harness

FOLLOW ME HOME FUNCTION

When the driver is moving to the house entrance from the own vehicle, headlamp is kept still ON by the follow
me home function of BCM.
• When BCM detects the input of lighting switch PASS while all of the following conditions are satisfied, it

transmits the low beam request signal for a period of time to IPDM E/R and the combination meter through
CAN communication.

Follow me home ON condition (When all of the following conditions are satisfied)

- Ignition switch OFF
- Lighting switch OFF or AUTO
• IPDM E/R turns the integrated smart FET ON according to low beam request signal and supplies power sup-

ply to LED headlamp control module.

• LED headlamp control module turns the headlamp (LO) ON according to the power supply from IPDM E/R.
• Combination meter turns the dipped beam indicator lamp ON according to the low beam request signal.
• When in any of following conditions, follow me home function can be cancelled while follow me home func-

tion is operating.

Follow me home OFF condition (When any of the following conditions are satisfied)

- Ignition switch other than OFF
- Lighting switch other than OFF or AUTO
- Follow me home operating time is expired
NOTE:
• Flash-to-pass operation illumination time for 1 time can be extended to approximately 30 seconds during

operation of follow me home function.

• Flash-to-pass operation can be illuminated continuously for approximately 60 seconds (flash-to-pass opera-

tion, 2 times), approximately 90 seconds (flash-to-pass operation, 3 times), and a maximum of approxi-
mately 120 seconds (flash-to-pass operation, 4 times).

HEADLAMP SYSTEM : Fail-safe

INFOID:0000000010338644

FAIL-SAFE CONTROL BY DTC

IPDM E/R performs fail-safe control when any DTC are detected.

SYSTEM

EXL-19

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

EXL

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

AUTO LIGHT SYSTEM : System Description

INFOID:0000000010338645

SYSTEM DIAGRAM

OUTLINE

• Auto light system is controlled by each function of BCM and IPDM E/R.

DTC

CONSULT display description

Fail-safe

B20CE

HL (HI) LH PWR SPLY CIRC

[CIRC
SHORT TO
GRND]

Shuts off the power supply to the headlamp (HI) LH power
supply circuit until the headlamp (HI) ON conditions are
no longer satisfied.

B20CF

HL (HI) RH PWR SPLY CIRC

[CIRC
SHORT TO
GRND]

Shuts off the power supply to the headlamp (HI) RH pow-
er supply circuit until the headlamp (HI) ON conditions are
no longer satisfied.

B20D0

HL (LO) LH PWR SPLY CIRC

[CIRC
SHORT TO
GRND]

Shuts off the power supply to the headlamp (LO) LH pow-
er supply circuit until the headlamp (LO) ON conditions
are no longer satisfied.

B20D1

HL (LO) RH PWR SPLY CIRC

[CIRC
SHORT TO
GRND]

Shuts off the power supply to the headlamp (LO) RH pow-
er supply circuit until the headlamp (LO) ON conditions
are no longer satisfied.

B20E2

LED HEADLAMP RH

[CMPNENT
INTERNAL
MLFNCTN]

Transmits the headlamp warning signal (CAN communi-
cation) to the combination meter when the headlamp (LO)
ON conditions are satisfied. (When the ignition switch
turns ON, the headlamp warning is displayed on the infor-
mation display of the combination meter.)

B20E3

LED HEADLAMP LH

[CMPNENT
INTERNAL
MLFNCTN]

Control part

Fail-safe operation

Headlamp

• Turns ON the headlamp (LO) when the ignition switch is turned ON.
• Turns OFF the headlamp (LO) when the ignition switch is turned OFF.
• Headlamp (HI): OFF

JMLIA5228GB

EXL-20

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

SYSTEM

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-21, "HIGH BEAM ASSIST SYSTEM : System Description"

• Front fog lamp depend on the front fog lamp switch condition (only when the fog override function setting is

OFF). (without rear fog lamp)

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

function setting is OFF). (with rear fog lamp)

• 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-33, "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-21, "HIGH BEAM ASSIST SYSTEM : System Description"

• Front fog lamp and rear fog lamp does not turn ON automatically (depend on the each fog lamp switch oper-

ation).

• ON/OFF of fog override function can be changed using CONSULT. Refer to

INL-15, "INT LAMP : CONSULT

Function (BCM - INT LAMP)"

HIGH BEAM ASSIST SYSTEM

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