If the ig coil does not work properly because the ECU does not turn on ….
Plug-ins are very important in gasoline cars. In high-end cars, the plug coil is powered by a single coil called a COP. In the early 2000s, igniters, called backpacks, provided ignition, and earlier it became a distributor type. The plug coil comes with four in the Toyota group. In the Nissan group, it comes with three wheels. There is a sensor that controls the plug coil. It is a chem shirt sensor called a CMP sensor. If the sensor is bad, the engine will not work properly. If the plug does not light up, the wiring may be bad.
The ECU may be bad. If you want to know the path of the power supply to the plug coil from the ECU, you need to use the IGT (1,2,3,4) in the ECU. You need an ECU pinout to find out what an IGT is. Toyota even has IGF ignition feedback between 0.1 and 4.5V. If one of the two plants does not light up, the engine will have a problem.
The ECU has an ic plate that works for the plugs. If the ECU needs to be repaired due to a power outage, the ECU paths associated with the ignition ic must be routed. Transiator in between diode; capacitior; Resistors must also be measured. The EC’s location varies from pen to pen, so it can’t be considered dead. Nissan, for example, uses NEC-based 24-core chips.
In the ECUs of low-end cars, the ignition ics are aligned with a single coil per coil, for a total of four ICs. You do not have to search for it. If you see four flat ICs in a row, you can easily tell what a plug IC is. My experience is Toyota, Nissan cars have the same problem. If it weren’t for the rare hat, no one would be blindfolded and just go for a new hat.