The DRB-III scanner is the tool Dodge and Chrysler uses for pretty much all electronics in the car. You can use a standard OBD-II scanner to retrieve codes and erase codes but the DRB-III scanner lets you change codding in the PCM and also run circuit tests and all kinds of nifty stuff. Basically it's a master computer for the PCM.
Heres one on sale at amazon and they run for more that the $8,900 price tag
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