Scheme of the Ecotronic system (BMW 5 Series E12)

Scheme of the "Ecotronic" system:

1 - carburetor; 2 — 1st chamber throttle potentiometer; 3 — air damper servo drive; 4 — 1st chamber throttle valve servo drive with idle switch; 5 — controller; 6 - incoming air temperature sensor; 7 — ignition switch (contact "15"); 8 — main protection relay; 9 — electro-pneumatic valve for regulating the ignition timing at idle speed; 10 — ignition distributor sensor; 11 — switch (plug "TD ignition signal"); 12 — throttle valve pneumatic drive; 13 - thermostatic valve; 14 - econometer; 15 — air valve of the engine braking system; 16 - air filter; 17 — filter; 18 — fuel supply pipe.

Scheme of the "Ecotronic" system:

79 — 1st chamber throttle valve servo drive; 80 - Idle switch; 81 — air damper servo drive; 82 — 1st chamber throttle position potentiometer; 83 - incoming air temperature sensor; 84 — electro-pneumatic valve for adjusting ignition timing; 85 — control relay; 86 — battery; 87 — "TO" plug (engine speed pulses) switch connector; 88 - controller; 89 — to plug "15i"; 90 — to the economy labor; 91-to the "mass" point for removing the nominal idle speed. Wire Color: H-Black; B - white.