By changing the PROM, we can make the same computer properly control different engines. What it does not know is the quantities: how much spark advance, how much fuel to inject, how much exhaust gas recirculation, etc.
Genteg ecm tools were in miami how to#
Using this software, the ECM will know how to initiate ignition primary dwell and actuate spark output, as well as how to actuate the fuel injectors, how to control the EGR valve, etc.
Genteg ecm tools were in miami software#
The software contains the instructions on how to control an engine or powertrain. The ECM’s microprocessor has embedded software that instructs the microprocessor on its initial tasks. When you first turn on the ignition switch in the car, the ECM goes through a power-up mode not unlike your desktop PC. To clarify this a little further, let’s take a look at the software structure within the ECM.
The PROM contains the calibration software for the ECM. The only difference (aside from the vehicle wiring harness pin population) was the PROM. This ECM was used on the ’89 S-10 truck with the 2.5L four-cylinder, the ’89 Camaro with the 5.0L HO V8 and the ’89 Corvette with the 5.7L Tuned-Port V8 engine. For example, in 1989, Chevrolet used one engine control module, part #1227165, to control three different engines. The PROM chip is used to calibrate the ECM so that it is configured to run a particular engine. Naturally, this short list does not describe the entire contents of the ECM, but what is important to our understanding of flashing is the PROM part of the ECM. 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.
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