System Outline

Current is always applied from the dome fuse to TERMINAL +CB of Power Seat ECU, from door CB to TERMINAL +PB of Power Seat ECU and from stop fuse to TERMINAL 2 of stop light SW.

When the Ignition SW is turned ON, current flows from ECU-IG fuse to TERMINAL IG of Power Seat ECU and from the gauge fuse to TERMINAL 4 of A/T indicator SW.

POWER SEAT OPERATION (FOR DRIVER'S SEAT)
Current is always applied to TERMINAL +CB and TERMINAL +PB of Power Seat ECU so that the Power Seat ECU is always ready to operate.

When the Power Seat Control SW is pushed to the "FRONT SLIDE Position" side, a signal is input into TERMINAL SSLF of Power Seat ECU, the ECU operates and the current to TERMINAL +PB of Power Seat ECU flows from TERMINAL MSF of Power Seat ECU --> TERMINAL 1 of Power Seat Motor (for driver's seat slide Control) Motor --> TERMINAL 2 --> TERMINAL MSR of Power Seat ECU --> TERMINAL GND --> GROUND, rotating the Power Seat Motor so that the seat slides forward while the Power Seat Control SW is being pressed.

To side the driver's seat to the rear, pushing the power Control SW to the "REAR SLIDE Position" side, inputs a signal to TERMINAL SSLR of Power Seat ECU. This causes the current flowing from the ECU to the Motor to flow from TERMINAL MSR of Power Seat ECU --> TERMINAL 2 of Power Seat Motor (for driver's seat slide Control) --> Motor --> TERMINAL 1 --> TERMINAL MSF of Power 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 CONTROL "UP" OPERATION
TERMINAL +PB of Power Seat ECU --> TERMINAL MFVU --> TERMINAL 1 of Power Seat Motor --> Motor --> TERMINAL 2 --> TERMINAL MFVD of ECU --> TERMINAL GND --> GROUND.

FRONT VERTICAL CONTROL "DOWN" OPERATION
TERMINAL +PB of Power Seat ECU --> TERMINAL MFVD --> TERMINAL 2 of Power Seat Motor --> Motor --> TERMINAL 1 --> TERMINAL MFVU of ECU --> TERMINAL GND --> GROUND.

REAR VERTICAL CONTROL "UP" OPERATION
TERMINAL +PB of Power Seat ECU --> TERMINAL MRVU --> TERMINAL 2 of Power Seat Motor --> Motor --> TERMINAL 1 --> TERMINAL MRVD of ECU --> TERMINAL GND --> GROUND.

REAR VERTICAL CONTROL "DOWN" OPERATION
TERMINAL +PB of Power Seat ECU --> TERMINAL MRVD --> TERMINAL 1 of Power Seat Motor --> Motor --> TERMINAL 2 -->TERMINAL MRVU of ECU --> TERMINAL GND --> GROUND.

HEAD REST CONTROL "UP" OPERATION
TERMINAL +PB of Power Seat ECU --> TERMINAL MHU --> TERMINAL 1 of Power Seat Motor --> Motor --> TERMINAL 2 --> TERMINAL MHD of ECU --> TERMINAL GND --> GROUND.

HEAD REST CONTROL "DOWN" OPERATION
TERMINAL +PB Power Seat ECU --> TERMINAL MHD --> TERMINAL 2 of Power Seat Motor --> Motor --> TERMINAL 1 --> TERMINAL MHU of ECU --> TERMINAL GND --> GROUND.

LUMBAR SUPPORT CONTROL "FRONT" OPERATION
TERMINAL 8 of Power Seat Control SW --> TERMINAL 4 of lumbar support SW --> TERMINAL 1 --> TERMINAL 2 of Power Seat Control SW --> TERMINAL 2 of Power Seat Motor --> Motor --> TERMINAL 1 --> TERMINAL 1 of Power Seat Control SW --> TERMINAL 2 of lumbar support SW --> TERMINAL 3 --> TERMINAL 7 of Power Seat Control SW --> GROUND.

LUMBAR SUPPORT CONTROL "REAR" OPERATION
TERMINAL 8 of Power Seat Control SW --> TERMINAL 4 of lumbar support SW --> TERMINAL 2 --> TERMINAL 1 of Power Seat Control SW --> TERMINAL 1 of Power Seat Motor --> Motor --> TERMINAL 2 --> TERMINAL 2 of Power Seat Control SW --> TERMINAL 1 of lumbar support SW --> TERMINAL 3 --> TERMINAL 7 of Power Seat Control SW --> GROUND.

The number of turns of each Motor (amount of movement of each part of the seat) is detected by the position sensors and input to the ECU, making it possible to perform memory and return functions for the seat position using the driving position memory and return switch.