Circuit Description
WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.
The seat memory switch sends signals to the position control ECU to memorize a given seat position. This memory system does not use a position sensor. The seat position is detected by counting pulses that are output when the motor turns. If there is no pulse output from the motor, the motor will stop operating. The seat memory switch is later used to send signal to the position control ECU to return to one of the memorized positions.
The power seat memory operation is performed only when the ignition switch is in the ON position and the park/neutral position switch is in the P (parked) position.