Light Control Switch Circuit: Description
WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
The main body ECU receives the following signals:
- Light control switch TAIL, HEAD, or AUTO signal.
- Dimmer switch HIGH or HIGH FLASH (PASS) signal.
- Front fog light switch signal.
- Rear fog light switch signal.
HINT:
- When performing troubleshooting, inspect the switch that is related to the malfunction. For example, if both right and left low beam headlights do not illuminate, read the light control switch HEAD signal value only in the data list. If the value is normal, perform the headlight relay active test.