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U1000 Diagnostic Trouble Code Discussion for August 2014

Class 2 Communication Malfunction

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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2003 Chevrolet Impala 3.4L No Start VIN: 2G1WF52EX3
U1000: Class 2 Communication Malfunction. ... until I jump the starter relay, then no fuel after a second. Scanned for codes and the PCM won’t communicate with the scanner. All other modules communicate and most have codes for missing class 2 serial data. (U1000, U1255,...
August 05, 2014
2007 Nissan Frontier SE 4.0L No Start VIN: 1N6AD09U17
U1000: Controller Area Network Line Malfunction. Customer stated that the vehicle stalled out on freeway and then would not crank. Noticed burned tcm fuse. Installed a 20 amp fuse (it takes a 10 Amp) drove it to the shop, we were closed at the time. He says it drove fine to the shop. Get here in the morning ...
August 09, 2014
2004 Nissan Sentra 1.8L MIL Lamp on VIN: 3N1CB51D14
U1000: Controller Area Network Line Malfunction. ... 2 code u1000, u1001 found damage trans module replace by used and code u1001 gone also trans is on safe mode third gear. Also replace engine control module still same clean all grounds.
August 11, 2014
2003 Isuzu Ascender Limited 5.3L No Start VIN: 4NUET16P13
U1000: . ... replace exhaust manifold bolts,(snapped).put all back together no crank,no fuel,no spaark,i can jump terminals at stater or starter relay and engine will crank but won`t for codes and there is no communication with pcm,tcm.i can communicate with a...
August 24, 2014