How to Diagnose Faults in a Car's Ignition System?

[VanGabrielle]

Diagnostic methods for faults in an electronically controlled ignition system are as follows: 1. Electronically controlled ignition system: Typically, an ignition coil consists of two main coils—the primary coil and the secondary coil. These two coils play a key role in ignition by converting voltage from low to high. Since the primary coil has more turns than the secondary coil, the ignition coil can transform the vehicle's low voltage into high voltage. 2. Principle: When current is conducted to the primary coil, electrical energy is converted into magnetic energy within the primary coil, gradually forming a strong magnetic field around the coil, which stores the magnetic energy in the coil's iron core. Generally, the coil is equipped with a switching device. When the switching device disconnects the primary coil's circuit, the magnetic field rapidly decreases due to the absence of current, and the secondary coil, having fewer turns, induces a very high voltage. Understanding this principle allows for diagnostic troubleshooting when a fault in the ignition system is initially suspected.