Will this unit allow me all access to the ecm to alter all areas eg set speed limiter to a lower speed and is there a yearly lic fee. This device is what you should use if you will be hooking up to both off-highway & on-highway CAT engines. If you are strictly wanting to work on on-highway Caterpillar Diagnostic Tool engines, I would rather see you purchase a Nexiq USB Link .The Nexiq USB Link is universal (Works with CAT, Cummins, Detroit, Allison, etc…), it is cheaper, plus it has bluetooth so you can go wireless.
This item works with all CAT ECMS — Off Road and On Highway, trucks and equipment. it reads both J1708 and J1939 so it can read both of those. Keep in mind that this adapter only comes with the J1939 adapter end, so I would recommend purchasing the J1708 adapter end from me as well if you plan on connecting to some older stuff.
Caterpillar Diagnostic Tool also be used to read detroit and cummins engines if I have the correct software? Yes, it reads both J1708 and J1939 so it can read both of those. Keep in mind that this adapter only comes with the J1939 adapter end, so I would recommend purchasing the J1708 adapter end from me as well if you plan on connecting to some older stuff.
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