Nissan Qashqai J11. Manual - part 1682

SYSTEM

EXL-29

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

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• BCM detects the brake pedal position status from stop lamp switch. 
• BCM supplies voltage to stop lamp and high-mounted stop lamp according to the stop lamp and high-

mounted stop lamp ON condition.

Stop lamp and high-mounted stop lamp ON condition

- Brake pedal is depressed

FORWARD EMERGENCY BRAKING FUNCTION

• When the Forward Emergency Braking operates, the ABS actuator and electric unit (control unit) transmits

the stop lamp request signal to BCM via CAN communication. (For details about the Forward Emergency
Braking, refer to 

BRC-150, "System Description"

.)

• When BCM receives the stop lamp request signal from the ABS actuator and electric unit (control unit), it

supplies power to the stop lamp and high-mounted stop lamp systems, turning ON the stop lamp and high-
mounted stop lamp.

FRONT FOG LAMP SYSTEM

FRONT FOG LAMP SYSTEM : System Description

INFOID:0000000010338668

SYSTEM DIAGRAM

OUTLINE

Front fog lamp is controlled by combination switch reading function and front fog lamp control function of BCM,
and smart FET control function of IPDM E/R.

FRONT FOG LAMP OPERATION 

• BCM detects the combination switch condition by the combination switch reading function.
• BCM transmits the front fog light request signal to IPDM E/R and the combination meter via CAN communi-

cation according to the front fog lamp ON condition.

Front fog lamp ON condition (when any of the following conditions are satisfied) (without rear fog lamp)

- Lighting switch 1ST with the front fog lamp switch ON
- Lighting switch 2ND with the front fog lamp switch ON
- Lighting switch AUTO with the front fog lamp switch ON (Only when the illumination judgment by auto light

system is ON. For details, refer to 

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

.)

Front fog lamp ON condition (with rear fog lamp)

- Front fog lamp switch is turned from OFF to ON, and any of the following conditions are satisfied.
• Lighting switch 1ST
• 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"

.)

• IPDM E/R turns the integrated smart FET ON, and turns the front fog lamp ON according to the front fog light

request signal.

• Combination meter turns the front fog lamp indicator lamp ON according to the front fog light request signal.

JMLIA5239GB

EXL-30

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

SYSTEM

FRONT FOG LAMP SYSTEM : Fail-safe

INFOID:0000000010338670

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

REAR FOG LAMP SYSTEM

REAR FOG LAMP SYSTEM : System Description

INFOID:0000000010338671

SYSTEM DIAGRAM

OUTLINE

Rear fog lamp is controlled with the combination switch reading function and the rear fog lamp control function
of BCM. 

REAR FOG LAMP OPERATION

• BCM detects the condition of the combination switch by the combination switch reading function.
• BCM supplies voltage to rear fog lamp according to the rear fog lamp ON condition.

Rear fog lamp ON condition

- Rear fog lamp switch is turned from OFF to ON, and any of the following conditions are satisfied.
• Lighting switch 1ST
• 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"

.)

• BCM transmits the rear fog lamp status signal to the combination meter using CAN communication. 
• Combination meter turns the rear fog lamp indicator lamp ON according to the rear fog lamp status signal.

EXTERIOR LAMP BATTERY SAVER SYSTEM

DTC

CONSULT display description

Fail-safe

B121A

FR FOG LAMP LH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the front fog lamp LH power 
supply circuit until the front fog lamp ON conditions are no 
longer satisfied.

B1256

FR FOG LAMP RH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the front fog lamp RH power 
supply circuit until the front fog lamp ON conditions are no 
longer satisfied.

Control part

Fail-safe operation

Front fog lamp

Front fog lamp: OFF

JMLIA3188GB

SYSTEM

EXL-31

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

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EXTERIOR LAMP BATTERY SAVER SYSTEM : System Description

INFOID:0000000010338673

SYSTEM DIAGRAM

OUTLINE

• Exterior lamp battery saver system is controlled by combination switch reading function and exterior lamp

battery saver function of BCM, and smart FET control function of IPDM E/R.

• BCM turns the exterior lamp* OFF, according to the vehicle status when ignition switch is turned OFF while

exterior lamp is ON, for preventing battery discharge.

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

EXTERIOR LAMP BATTERY SAVER ACTIVATION

• BCM turns the exterior lamps OFF (battery saver is activated) when all of the following conditions are satis-

fied. 

- Exterior  lamp:  ON
- Engine status: Running

→

Stop (ignition switch is turned OFF)

- Front door switch (driver side): OFF

→

ON

NOTE:
When in any of following conditions (after the exterior lamp battery saver is activated), exterior lamps [except
front fog lamp (with rear fog lamp) and rear fog lamp] can be turned ON.
• Lighting switch: 1ST or 2ND

→

OFF or AUTO

→

1ST or 2ND

• Engine status: Stop

→

Running

JMLIA5240GB

EXL-32

< SYSTEM DESCRIPTION >

[LED HEADLAMP]

DIAGNOSIS SYSTEM (BCM)

DIAGNOSIS SYSTEM (BCM)

COMMON ITEM

COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)

INFOID:0000000010452422

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.

×

: Applicable item

NOTE:
*: This item is displayed, but not used.

FREEZE FRAME DATA (FFD)

The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT.

Diagnosis mode

Function Description

Work Support

Changes the setting for each system function.

Self Diagnostic Result

Displays the diagnosis results judged by BCM.

CAN Diag Support Monitor

Monitors the reception status of CAN communication viewed from BCM.

Data Monitor

The BCM input/output signals are displayed.

Active Test

The signals used to activate each device are forcibly supplied from BCM.

Ecu Identification

The BCM part number is displayed.

Configuration

• Read and save the vehicle specification.
• Write the vehicle specification when replacing BCM.

System

Sub system selection item

Diagnosis mode

Work Support

Data Monitor

Active Test

Door lock

DOOR LOCK

×

×

Rear window defogger

REAR DEFOGGER

×

×

Warning chime

BUZZER

×

×

Exterior lamp

HEAD LAMP

×

×

×

Interior room lamp control

INT LAMP

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps

FLASHER

×

×

—

AIR CONDITONER*

×

×

Intelligent Key system

INTELLIGENT KEY

×

×

×

Combination switch

COMB SW

×

Body control system

BCM

×

NVIS - NATS

IMMU

×

Interior room lamp battery saver

BATTERY SAVER

×

Back door open

TRUNK

×

Vehicle security

THEFT ALM

×

×

RAP

RETAINED PWR

×

Remote keyless entry system

MULTI REMOTE ENT

×

×

Signal buffer system

SIGNAL BUFFER

×

×