How to Measure the Condition of an Ignition Coil?

[LeHazel]

The testing method for the ignition coil is as follows: 1. Set the vehicle's ignition switch to the "ON" position. Then unplug the ignition coil connector, use one end of the multimeter to measure pin 3 and the other end to measure the ground wire. If the voltage between the pin and the ground wire is around 12V, proceed to the next step; if not, check the wiring. 2. Unplug the ignition coil connector, use one end of the multimeter to measure pin 1 and the other end to measure pin 5# of the ECU to check for any short circuits or open circuits. If any are found, check the wiring; if not, proceed to the next step. 3. Unplug the ignition coil connector, use one end of the multimeter to measure pin 2 and the other end to measure pin 2# of the ECU to check for any short circuits or open circuits. If any are found, check the wiring; if not, proceed to the next step. 4. Use the multimeter to measure whether the resistance of the sensor's primary coil is 0.9Ω. If yes, proceed to the next step; if not, replace the ignition coil. 5. Use the multimeter to measure whether the resistance of the sensor's primary coil is 14.5Ω. If yes, proceed to the next step; if not, replace the ignition coil.