EFI Control System: Operation
Electronic Ignition Timing Advance Control (EITAC) system is controlled by ECU. Ignition timing is controlled by detecting engine and vehicle running conditions, ECU memory data, and input signals from various sensors to ECU. A self-diagnostic system is built in ECU. If any abnormality should occur in signal from any sensor, a malfunction code will be memorized by ECU and a "CHECK ENGINE" light will illuminate at instrument panel.