Parking assistant circuit for Porsche Boxster 987 facelift (2006-2009)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 PINS 19-28 NOT USED SPEAKER 1 2 3 4 5 6 7 8 9 10 11 12 SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4 SENSORS + 2 1 3 SIGNAL 2 3 1 SIGNAL BLK WIRE BLK/BLU WIRE BLK/ORG WIRE BRIDGE PLUG BRN WIRE BRN/BLK WIRE DIAGNOSIS DIAGNOSIS CONNECTOR (BELOW LEFT SIDE OF DASH) FUSE HOLDER C (UNDER LEFT SIDE OF DASH, AT LEFT KICK PANEL) FUSE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HOT W/ TERM 15 RELAY ENERGIZED INSTRUMENT CLUSTER ORG/ WIRE ORG/BLU WIRE PARK ASSIST INPUT PARKING ASSISTANT CONTROL UNIT (UNDER LEFT SEAT) RED/GRY WIRE REVERSE SIG SENSORS GND SIGNAL TERM 15 TERM 31 ULTRASONIC SENSOR 1 (RIGHT REAR) ULTRASONIC SENSOR 2 (MIDDLE RIGHT REAR) ULTRASONIC SENSOR 3 (MIDDLE LEFT REAR) ULTRASONIC SENSOR 4 (LEFT REAR)