Power and Ground

Fuse F4 applies battery voltage to retain the memory circuit of the Memory Seat ECU (Z146) at all times. Voltage to operate the seat motors (M126, M127, M128, M129) and the mirror actuators (M115, M123) is supplied to the Memory Seat ECU from fuses F2 and F3. The Maxi Fuse MF3 supplies voltage to fuses F2 and F3 whenever the Left Seat Power Relay (K113) is energized. The relay is energized when the driver's door is open, causing the Left Front Door Switch (X150) to ground the relay's coil, or when the ignition is in position II, causing the Right Seat Power Relay (K131) to ground the Left Seat Power Relay. The Memory Seat ECU is grounded at around E300 through the B wires.