Height Control Sensor Circuit: Description
WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
The headlight beam level control ECU receives the height control sensor signal from the height control sensor sub-assembly.
The headlight beam level control ECU calculates a height value from the height control signal. The voltage at the power source of the height control sensor is corrected when SHR is detected.