Luv 2WD L4-110 1800cc (1982)
Engine Control Module: Description and Operation
The ECM controls the air/fuel ratio by varying the Duty Cycle [1] of the vacuum controller solenoid as a function of sensor input voltages.
ECM Modes Of Operation:
Inhibit Mode - No signal to vacuum controller solenoid.
Enrichment Mode - Fixed pre-programmed duty cycle to vacuum controller solenoid.
Open Loop Mode - Fixed pre-programmed duty cycle to vacuum controller.
Closed Loop Mode - Calculated duty cycle generated from sensor inputs--including oxygen sensor.
[1] Duty Cycle - the percentage of time the solenoid is ON.
