1 - Control unit plug 2 - Ignition coil 3 - Throttle valve switch 4 - Altitude compensator (optional) 5 - Auxiliary air valve 6 - Cold start valve 7 - Thermo-time switch 8 - Fuel pump fuse 9 - Electric fuel pump 10 - Battery

11 - Double relay 12 - Pre-resistors 13 - Cylinder 4 injection valve 14 - Cylinder 3 15 - Cylinder 2 16 - Cylinder 1 17 - Air flow meter 18 - Temperature sensor 19 - System ground 20 - Relay ground