Charging System: Description and Operation

Generator Control System Description

Generator control system consists of a generator (1) and ECM (4).
ECM controls generated electricity (adjusting voltage of IC regulator (2)) so that it is suitable the engine and electric load conditions. When the electric load increases quickly, generation load of the generator increases quickly and causes idling to change. To prevent this, ECM makes generated electricity volume vary gradually to stabilize idling. Also, it reduces the engine load caused by temporary increase in electricity generation to cope with the engine condition (such when accelerating).

Operation
ECM controls the generated voltage of the generator using "C" terminal (generator control terminal) duty, based on the following information.
^ Engine condition (ECT, vehicle speed, engine speed, TP, etc.) (7)
^ Battery voltage (ECM backup power voltage) (8)
^ Electric load condition (blower motor, rear defogger, head lights, radiator fan, A/C, etc.) (9)