Height Control Sensor Circuit: Description
WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
The height control sensor rear RH controls the resistance value based on changes vehicle height. The headlight beam level control ECU detects the changes in vehicle height from the transformed voltage. The headlight beam level control ECU outputs a constant voltage of 5 V to the SHB terminal of the height control sensor rear RH.
In the height control sensor sub-assembly rear RH, the voltage changes due to the resistance. The changes voltage is output from the SHRR terminal of the height control sensor rear RH to the headlight beam level control ECU, thus the vehicle's height is detected.