Fig.1) Engine Idle after Warm Up

COM → Duty(+) Approx. 34%

Duty(-) Approx. 66%

FR → Duty(+) Approx. 58%

Duty(-) Approx. 42%

Fig.2) Electrical Load(Engine Idle after Warm Up)

COM → Duty(+) Approx. 34%

Duty(-) Approx. 66%

FR → Duty(+) Approx. 96%

Duty(-) Approx. 4%

Duty(+) from FR terminal is increased if electrical loads are ON(Head Lamp and Defrost are ON) ECM controls generation of alternator with duty from FR terminal when electrical Loads turn on.