Seats: Description and Operation

Current is always applied from DOME-FR fuse to TERMINAL SYSB of power seat ECU, from SEAT FR fuse to TERMINAL +B of power seat ECU, TERMINAL 8 of the power seat control SW (driver's seat) and TERMINALS 8, 14 of the power seat control SW (front passenger's seat), and from STOP LP fuse to TERMINAL 2 of stop light SW.

With the ignition SW 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 (DRIVER'S SEAT)
Current is always applied to TERMINAL SYSB and TERMINAL +B of power seat ECU so that 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 SLDF of power seat ECU, the ECU operates and the current to TERMINAL +B of power seat ECU flows from TERMINAL SLD+ of power seat ECU --> TERMINAL 3 of power seat motor (driver's seat slide control) --> motor --> TERMINAL 4 --> TERMINAL SLD- 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 slide the driver's seat to the rear, pushing the power control SW to the "REAR SIDE POSITION" side, inputs a signal to TERMINAL SLDR of power seat ECU. This causes the current flowing from the ECU to the motor to flow from TERMINAL SLD- of power seat ECU --> TERMINAL 4 of power seat motor (driver's seat slide control) --> motor --> TERMINAL 3 --> TERMINAL SLD+ 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 +B of power seat ECU --> TERMINAL FRV+ --> TERMINAL 4 of power seat motor --> motor --> TERMINAL 3 --> TERMINAL FRV- of ECU --> TERMINAL GND --> GROUND.

FRONT VERTICAL CONTROL 'DOWN' OPERATION
TERMINAL +B of power seat ECU --> TERMINAL FRV- --> TERMINAL 3 of power seat motor --> motor --> TERMINAL 4 --> TERMINAL FRV+ of ECU --> TERMINAL GND --> GROUND.

REAR VERTICAL CONTROL 'UP' OPERATION
TERMINAL +B of power seat ECU --> TERMINAL RRV+ --> TERMINAL 4 of power seat motor --> motor --> TERMINAL 3 --> TERMINAL RRV- of ECU --> TERMINAL GND --> GROUND.

REAR VERTICAL CONTROL 'DOWN' OPERATION
TERMINAL +B of power seat ECU --> TERMINAL RRV- --> TERMINAL 3 of power seat motor --> motor --> TERMINAL 4 --> TERMINAL RRV+ of ECU --> TERMINAL GND --> GROUND.

HEAD REST CONTROL 'UP' OPERATION
TERMINAL +B of power seat ECU --> TERMINAL H+ --> TERMINAL 2 of power seat motor --> motor --> TERMINAL 1 --> TERMINAL H- of ECU --> TERMINAL GND --> GROUND.

HEAD REST CONTROL 'DOWN' OPERATION
TERMINAL +B power seat ECU --> TERMINAL H- --> TERMINAL 1 of power seat motor --> motor --> TERMINAL 2 --> TERMINAL H+ 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 1 of power seat motor --> motor --> TERMINAL 2 -> TERMINAL 1 of power control seat SW --> TERMINAL 2 of lumbar support SW --> TERMINAL 3 --> TERMINAL 7 of power control seat 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 2 of power seat motor --> motor --> TERMINAL 1 --> TERMINAL 2 of power control seat SW --> TERMINAL 1 of lumbar support SW --> TERMINAL 3 --> TERMINAL 7 of power control seat 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.