Light Control Switch Circuit: Description
WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
The combination switch ECU (windshield wiper switch assembly) receives the following switch information.
- Light control switch position is Off, Tail, Head, or Auto
- Headlight dimmer switch position is High, Low, or Flash (Pass)
- Turn signal switch position is LH, RH or Off
- Fog light switch position is On or Off
The combination switch ECU then converts these signals to BEAN signals and sends them to each ECU via the multiplex communication system.
The headlight dimmer switch assembly includes the light control, headlight dimmer, turn signal, and fog light switches.