Power Seat Operation

WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

Current is always applied to terminal SYSB and terminal +B of the memory seat ECU so that the memory seat ECU is always ready to operate.

When the power seat control switch is pushed to the FRONT SLIDE position side, a signal is input into terminal SLDF of the memory seat ECU, the ECU operates and the current to terminal +B of the memory seat ECU flows from terminal SLD+ of the memory seat ECU to terminal No. 2 of the power seat motor (driver's seat slide control) to terminal No. 1 to terminal SLD- of the memory seat ECU to terminal GND to ground, rotating the power seat motor so that the seat slides forward while the power seat control switch is being pressed.

To slide the driver's seat to the rear, pushing the power seat control switch to the REAR SIDE position side, inputs a signal to terminal SLDR of the memory seat ECU. This causes the current flowing from the ECU to the motor to flow from terminal SLD- of the memory seat ECU to terminal No. 1 of the power seat motor (driver's seat slide control) to terminal No. 2 to terminal SLD+ of the memory seat ECU, flowing the reverse to front slide operation and causing the motor to rotate in reverse, so that the driver's seat moves to the rear.

The movement to other positions occurs similarly, so only the flow of current to each motor is shown:

Front Vertical Up Operation - Terminal +B of the memory seat ECU to terminal FRV+ to terminal No. 1 of the power seat motor (driver's seat front vertical control) to terminal No. 2 to terminal FRV- of the ECU to terminal GND to ground.
Front Vertical Down Operation - Terminal +B of the memory seat ECU to terminal FRV- to terminal No. 2 of the power seat motor (driver's seat front vertical control) to terminal No. 1 to terminal FRV+ of the ECU to terminal GRN to ground.
Lifter Control Up Operation - Terminal +B of the memory seat ECU to terminal RRV+ to terminal No. 1 of the power seat motor (driver's seat lifter control) to terminal No. 2 to terminal RRV- of the ECU to terminal GND to ground.
Lifter Control Down Operation - Terminal +B of the memory seat ECU to terminal RRV- to terminal No. 2 of the power seat motor (driver's seat lifter control) to terminal No. 1 to terminal RRV+ of the ECU to terminal GND to ground.
Reclining Control Front Operation - Terminal +B of the memory seat ECU to terminal RCL+ to terminal No. 2 of the power seat motor (driver's seat reclining control) to terminal No. 1 to terminal RCL- of the ECU to terminal GND to ground.
Reclining Control Rear Operation - Terminal +B of the memory seat ECU to terminal RCL- to terminal No. 1 of the power seat motor (driver's seat reclining control) to terminal No. 2 to terminal RCL+ of the ECU to terminal GND to ground.