Nissan Qashqai J11. Manual - part 1680

SYSTEM

EXL-21

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

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HIGH BEAM ASSIST SYSTEM : System Description

INFOID:0000000010338647

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-19, "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 (input from ambient light sensor integrated in the front camera unit)
- Image sensor signal (input from image sensor integrated in the 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-17, "HEADLAMP SYSTEM : System Description"

.

RECOMMENDED BEAM JUDGMENT BY FRONT CAMERA UNIT

JMLIA5229GB

EXL-22

< 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.

HIGH BEAM ASSIST SYSTEM : Fail-safe

INFOID:0000000010338649

FRONT CAMERA UNIT TEMPORARY OPERATION CANCELLATION

• Temporary disabled status at high temperature
- If the vehicle is parked in direct sunlight under high temperature conditions, the system may be deactivated

automatically. And the system malfunction in information display.

- When interior temperature is reduced, the system will resume operation automatically.
• When vehicle front identification is difficult
- When vehicle front identification is difficult due to soiling of windshield glass and strong light shining from the

front, operation may be canceled temporarily. At this time, a warning is displayed on the vehicle information
display in the combination meter.

- Normal operation recovers when conditions improve.

DAYTIME RUNNING LIGHT SYSTEM

DAYTIME RUNNING LIGHT SYSTEM : System Description

INFOID:0000000010338650

SYSTEM DIAGRAM

OUTLINE

Daytime running light is controlled by daytime running light control function and combination switch reading
function of BCM, and smart FET control function of IPDM E/R.

DAYTIME RUNNING LIGHT OPERATION 

• BCM detects the combination switch condition by the combination switch reading function.
• BCM detects vehicle condition depending on the engine status signal and Stop/Start status signal* (received

from ECM via CAN communication).

• BCM transmits the daytime running light request signal to IPDM E/R via CAN communication according to

the daytime running light ON condition.

Daytime running light ON condition

- Engine running and any following conditions are satisfied.
• Lighting switch OFF
• Lighting switch AUTO (Only when the illumination judgment by auto light system is OFF. For details, refer to

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

.)

JMLIA5230GB

SYSTEM

EXL-23

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

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• IPDM E/R turns the integrated smart FET ON, and turns the daytime running light ON according to the day-

time running light request signal.

NOTE:
When the engine is stopped by the Stop/Start system, the operation of daytime running light system is not can-
celed.*
*: With Stop/Start system

DAYTIME RUNNING LIGHT SYSTEM : Fail-safe

INFOID:0000000010338652

FAIL-SAFE CONTROL BY DTC

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

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

HEADLAMP AIMING CONTROL SYSTEM (AUTO)

HEADLAMP AIMING CONTROL SYSTEM (AUTO) : System Description

INFOID:0000000010338656

SYSTEM DIAGRAM

OUTLINE

• Headlamp aiming control system is controlled by IPDM E/R.
• IPDM E/R controls the headlamp light axis height appropriately depending on the vehicle rear height.
• IPDM E/R detects the vehicle condition necessary for the headlamp aiming motor control with the following

signals.

- Height sensor signal (inputted from height sensor)
- Low beam request signal (received from BCM via CAN communication)
- Vehicle speed signal (received from combination meter via CAN communication)

HEADLAMP AUTO AIMING OPERATION

DTC

CONSULT display description

Fail-safe

B1231

DTRL RH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the daytime running light RH 
power supply circuit until the daytime running light ON 
conditions are no longer satisfied.

B20CB

DTRL LH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the daytime running light LH 
power supply circuit until the daytime running light ON 
conditions are no longer satisfied.

Control part

Fail-safe operation

Daytime running light

Daytime running light: OFF

JMLIA5231GB

EXL-24

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

SYSTEM

• IPDM E/R calculates vehicle pitch angle from height sensor signal and determines the necessary correction

to compensate the deviation from standard light axis position.

• IPDM E/R outputs aiming motor drive signal when operating conditions are satisfied.

Operating condition (when all of the following conditions are satisfied)

- Ignition switch ON
- Headlamp (LO) ON
• IPDM E/R changes the aiming motor drive signal when any of the correcting condition is detected. Output is

maintained if other condition is detected.

Correcting condition (when any of the following conditions are satisfied)

- Ignition switch ON
- Headlamp (LO) is turned ON.
- Vehicle posture becomes stable after the vehicle posture change is detected with the headlamp (LO) ON

and the vehicle stopped.

- Vehicle speed is maintained with the headlamp (LO) ON and the vehicle driven.
NOTE:
Adjusted axis position may differ from the preset position although the headlamp auto aiming activates prop-
erly when the suspension is replaced or worn.

HEADLAMP AIMING CONTROL SYSTEM (AUTO) : Fail-safe

INFOID:0000000010338658

FAIL-SAFE CONTROL BY DTC

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

DTC

CONSULT display description

Fail-safe

B1C00

HEIGHT SENSOR PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Right and left headlamp aiming motors stop at the posi-
tion when DTC is detected.

[CIRC 
SHORT TO 
BATTERY]

B1C02

RR HEIGHT SENSOR SIGNAL

[CIRC 
SHORT TO 
BATTERY]

Right and left headlamp aiming motors stop at the posi-
tion when DTC is detected.

[CIRC 
SHORT TO 
GROUND 
OR OPEN]

[CIRC 
VOLTAGE 
OUT OF 
RANGE]

B1C07

AIMING MOTOR DRIVE SIGNAL

[CIRC 
SHORT TO 
GRND]

Right and left headlamp aiming motors stop at the posi-
tion when DTC is detected.

[CIRC 
SHORT TO 
BATTERY]

[SIGNAL 
COMPARE 
FAILURE]

B1C12

RR HEIGHT SENSOR SIGNAL

[SIG 
PRTCTN 
CLCLTN IN-
CRCT]

Right and left headlamp aiming motors stop at the posi-
tion when DTC is detected.