Ford Corsar Repair Manual page 180

E.C.C.S. DESCRIPTION
lgnition Timing Control
lgnition timing is controlled, corresponding to the engine operating
conditions, by the E.C.M.: that is, as the optimum ignition timing in
each driving condition has been pre-programmed in the E.C.M., the
ignition timing is determined by electrical signals processed in the
E.C.M.
The signal from E.C.M. is transmitted to power transistor, and con-
trols ignition timing.
Spark Plug Switching Control
Distributor (Hall effect sensor)
Water temperature sensor
E.C.M.
Engine speed
b
The spark plug switching control system is designed to change the
ignition system from 2-plug ignition to l-plug ignition during heavy
load driving in order to reduce engine noise.
Power transistors
Air flow meter
Power transistor
(Exhaust Coil)
Amount of intake air
Air flow meter b
Amount of intake air
E.C.M.
Engine speed
Distributor (Hall effect sensor)