How to Measure Ignition Coil Testing?
1 Answers
The ignition coil can convert the low-voltage electricity in the vehicle into high voltage, with the primary coil having a larger turns ratio than the secondary coil. The steps for measuring the ignition coil are as follows: 1. A multimeter can simply measure the resistance between the two high-voltage ends, but it cannot thoroughly determine the fault of the ignition coil. The voltage values between the terminals of an independent ignition coil connector vary, making it impossible to judge the condition of the ignition coil. A three-wire coil typically has power, ground, and ECU signal, while a four-wire one may include a speed feedback output. 2. Most ignition coil faults are inter-turn short circuits (high-voltage breakdown), which a multimeter cannot detect. Alternatively, you can momentarily connect the input terminal (primary) to the battery, and the output terminal (secondary) will produce a high-voltage output. Here is some relevant information about ignition coils: 1. The ignition coil is a component that generates high-voltage electricity. It has two sets of windings on an iron core: a primary winding and a secondary winding. The former connects to the low-voltage circuit of the battery, while the latter generates high voltage and connects to the spark plug circuit. 2. You can use the resistance setting on a multimeter to test the ignition coil. If it does not meet the rated value, the ignition coil should be replaced.
