Contents Wiring diagrams Section: Headlights All sections

Automatic Headlight Systems: Overview Nissan Altima L31

Headlights 1 illustration ~215 words

DESCRIPTION & OPERATION

WARNINGVehicles are equipped with air bag supplemental restraint system. Before attempting ANY repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG RESTRAINT SYSTEMS article.

The auto light control system has an optical sensor inside it that detects outside brightness. When the lighting switch is in "AUTO" position, it automatically turns "ON/OFF" the parking lamps and the headlights (and fog lamps if equipped) in accordance with the ambient light. Sensitivity can be adjusted in 4 steps. For the details of the setting, see SETTING CHANGE FUNCTIONS . When the lighting switch is in "AUTO" position, power is supplied from Body Control Module (BCM) terminal No. 45 to auto light sensor terminal No. 1.

When lighting switch is in "AUTO" position, ground is supplied from BCM terminal No. 53 to auto light sensor terminal No 3. When ignition switch is turned to "ON" or "START" position, and when outside brightness is darker than prescribed level, input is supplied to BCM terminal No. 38 from auto light sensor terminal No. 2. The headlights will then illuminate.

Operation Procedure

  1. Touch "HEAD LAMP" on "SELECT TEST ITEM" screen.
  2. Touch "WORK SUPPORT" on "SELECT DIAG MODE" screen.
  3. Touch "AUTO LIGHT SET" on "SELECT WORK ITEM" screen.
  4. Touch "START".
  5. Touch "NORMAL" or "MODE 2-4" of setting to be changed. (Scheme 1)
  6. Touch "SETTING CHANGE".
  7. The setting will be changed and "CUSTOMIZING COMPLETED" will be displayed.
  8. Touch "END".

Scheme 1

Scheme 1