Nissan Murano: System / Auto Light System

System Description

SYSTEM DIAGRAM

Signal transmission function list

*: High beam, low beam and position light

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

  • Auto light adjustment system

  Control by IPDM E/R

  • Relay control function

• Auto light system has the auto light function and delay timer function.

  • Auto light function automatically turns ON/OFF the exterior lamps* and each illumination automatically, depending on the outside brightness.

  • When auto light system turns the exterior lamps ON with ignition switch OFF, delay timer function turns the exterior lamps OFF, depending on the Nissan Murano vehicle condition with the auto light function after a certain period of time.

*: Headlamps (LO/HI), parking lamps, side marker lamps and tail lamps. Headlamp HI depends on the combination switch (lighting and turn signal switch) condition.

AUTO LIGHT FUNCTION

• BCM detects the combination switch (lighting and turn signal switch) condition with the combination switch reading function.

• BCM supplies voltage to optical sensor when ignition switch ON or ACC.

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

• BCM judges outside brightness from the optical sensor signal and judges ON/OFF condition of the exterior lamp and each illumination according to the outside brightness.

• 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:

ON/OFF timing differs based on the sensitivity from the setting. The setting can be set by CONSULT. Refer to CONSULT Function BCM(HEAD LAMP).

AUTO LIGHT ADJUSTMENT SYSTEM

The auto light adjustment system automatically, dims/brightens the display, according to brightness outside the Nissan Murano vehicle, when lighting switch 1ST, lighting switch 2ND or lighting switch AUTO is operated. Refer to System Description.

DELAY TIMER FUNCTION

BCM turns the exterior lamp OFF depending on the vehicle condition with the auto light function when ignition switch OFF.

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

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

• Turns the exterior lamp OFF with ignition switch ACC or the light switch OFF.

*: The preset time is 45 seconds. The timer operating time can be set by CONSULT. Refer to 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 exterior lamp battery saver function.