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Re: cummins isl9 fault 1894 communication ecm to turbo act
Posted to HD/Fleet Forum on 3/30/2021

First disconnect your batteries to take power off unit. Ohm data high to data low. Resistance should be close to 60 ohm. If it is not you have a terminal resistor missing or an open circuit somewhere. There is two resistors on the datalink. Both are 120 ohm. O... Login to read more.