What does ignition actuation open circuit mean?
2 Answers
The meaning of ignition actuation open circuit is that when the first cylinder completes the compression stroke, the second cylinder starts ignition to perform work, then the third cylinder follows after the second completes, and the fourth cylinder follows after the third completes. After the fourth cylinder finishes, the first cylinder starts ignition again. This cycle ensures each cylinder completes four strokes. When the engine speed is very high, the power output remains uninterrupted. The term "open circuit" here refers to discontinuous engine operation, indicating an engine fault. Below is relevant information about cylinders: 1. When the cylinder and cylinder block are cast as one unit, it's called an integral cylinder. 2. When the cylinder and cylinder block are cast separately, the individually cast cylinder is called a cylinder liner. 3. A cylinder liner that directly contacts the coolant is called a wet cylinder liner. 4. A cylinder liner that doesn't directly contact the coolant is called a dry cylinder liner.
I remember when my car had a problem last time, it was this ignition actuator open circuit. Simply put, the ignition system received the start signal, but the intermediate circuit was broken, so the car wouldn't start. That time it was a winter morning, the car wouldn't start, the sound was normal, but it just wouldn't fire up. After towing it to the repair shop, it turned out that the ignition coil's connecting wire had aged, and the connector had become loose and disconnected. The mechanic used a multimeter to test the resistance, which showed an open circuit. After replacing it with a new connector, the problem was solved. Actually, this kind of fault is quite common, especially in older cars, where aging wiring or moisture ingress can cause it. The impact is that the car can't start, which is troublesome, so I recommend checking for loose circuit connections as soon as any abnormality is noticed.
