Circuit Description
WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
The position sensor detects seat movement and sends pulse signals to the driver seat ECU for use with the memory function.
The ECU records the number of pulses relative to a previously recorded seat position and uses this data to return the seat to that position.
If a malfunction occurs in a position sensor and seat movement does not result in pulse signals being input into the ECU, the memory function is deactivated.