Ali Witte Posted October 26, 2022 Share Posted October 26, 2022 2009 Mack randomly shutting down. When it shuts down the ABS throws a code for no communication with ECM, ECM is getting voltage but not communicating. If you cycle the key a few times the ABS light goes away Wondering if anyone else has had this problem? I am thinking it is either an issue with the J1939 datalink or a problem with the VECU but I am unsure on how to test the VECU. Any help is greatly appreciated. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted October 26, 2022 Share Posted October 26, 2022 Start with the simple stuff , battery cables being tight . Anything the bed Company added on the batteries ( electric tarp motor cables) . Is the engine dying or just derate/dead throttle pedal? Quote Link to comment Share on other sites More sharing options...
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