What does ignition signal circuit mean in Toyota Celica 95?

In a 1995 Toyota Celica, the ignition signal circuit refers to the electrical pathway that relays signals from the ignition system, specifically from the ignition coil to the engine control unit (ECU). This circuit is crucial for the proper timing and firing of the spark plugs, ensuring efficient engine operation. If there are issues within this circuit, it can lead to starting problems or engine misfires. Proper functioning of the ignition signal circuit is essential for the vehicle's overall performance and reliability.