- #HOW TO USE GM TECH 2 SCANNER PDF#
- #HOW TO USE GM TECH 2 SCANNER MANUAL#
- #HOW TO USE GM TECH 2 SCANNER WINDOWS#
Fortunately, it isn't that bad yet with automotive PCMs, but it has become a crutch for automakers who rush products to market that aren't quite ready.
#HOW TO USE GM TECH 2 SCANNER WINDOWS#
Every time Bill gates rushes yet another version of Windows to market to perpetuate the Microsoft revenue stream, it always turns out to have bugs and security holes that were somehow missed but must be fixed by downloading and installing the latest Windows "service pack." It is a never ending cycle of upgrades and patches. Why Reprogram?Īs we said earlier, PCMs may need to be reprogrammed for several reasons. That's over 100 million vehicles that have been built since 1996. Today, almost all PCMs have reprogramming capabilities so changes and upgrades can be made if needed. Ford and Chrysler were also doing the same thing as OBD II arrived on all cars and light trucks in model year 1996. By 1995, most GM models had the flash reprogrammable PCMs. It's all done digitally with the proper access codes and input data.įollowing the Geo Storm, GM began phasing in PCMs with flash reprogrammable chips in a variety of cars and trucks. PCMs built with EEPROM chips can be reprogrammed in a matter of minutes without having to remove the PCM or replace a single chip.
#HOW TO USE GM TECH 2 SCANNER MANUAL#
The General Motors PROM Identification manual that OTC used to provide with their Monitor scan tool and Pathfinder software contained over 362 pages of GM PROM numbers!Įnter the flash reprogrammable EEPROM (Electronically Erasable Program Read Only Memory) chip. We're talking thousands of different PROMS. Every field fix or recall for an emissions or driveability problem created more part numbers to keep track of. Performance enthusiasts also liked replaceable PROMs because the chip could be replaced with one that provided more spark advance, fuel enrichment, a higher rev limit, etc., to squeeze more power out of the engine.īut replaceable PROMS had a serious drawback: there were too many of them! Every model year and every running change meant another PROM had to be created. It also meant that if a bug was later discovered in the original factory programming, it could be corrected in the field by simply replacing the original PROM with an updated corrected PROM (a tactic GM has successfully used over the years to fix many factory flaws). A replaceable PROM chip also meant the PCM could be "retuned" if necessary to correct certain kinds of emission or driveability problems. GM pioneered the replaceable PROM chip as a way of programming a limited number of basic PCMs to fit a wide range of GM makes and models. Up to this point, Program Read Only Memory (PROM) chips held all of the PCMs vital calibration information and operating instructions. GM knew OBD II was coming and that it would require a new generation of PCMs that were faster, more capable and able to be programmed electronically. The choice probably had more to do with production scheduling and new model introductions than profile or image. You'd think GM would have chosen a more high profile vehicle like a Cadillac or Corvette to usher in the new technology. Why a humdrum car like the Storm would be the first to receive a flash reprogrammable computer system is unknown. Would you believe flash reprogrammable PCMs have been in vehicles for over a decade? The first such application was the 1990 Geo Storm.
#HOW TO USE GM TECH 2 SCANNER PDF#
About Flash Reprogramming PCMs Download PDF
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