Height Control Sensor Circuit: Description
WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
This circuit provides power to operate the height control sensor. The headlight beam level control ECU calculates a height value from the height control sensor signal and the voltage at the power source of the height control sensor. The voltage at the power source of the height control sensor is corrected when SHFL or SHRL is detected.