They have a microprocessor, built-in random access memory (RAM), signal-conditioning chips (for sensor inputs), output transistor/drivers (for actuating ignition coils and fuel injectors) and a programmable read-only memory-type chip (PROM) for calibration purposes. Going back to the basics, you know that all automotive engine and powertrain control modules (PCMs) are essentially small-sized, dedicated computers. Before we get into what it takes to flash ECMs, let’s take a closer look at what flashing really is, why it is utilized on virtually all late-model cars and why this is such a great opportunity for repair shops. In case you’re on the technological slow boat, “flashing” refers to reprogramming automotive engine control modules (ECMs). I think we can all agree that the first group is far better off, and the only thing we need to expose is the benefits of this new “flashing” technology.
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