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U1000 Diagnostic Trouble Code Discussion for June 2013

Class 2 Communication Malfunction


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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2004 Chevrolet Classic (Car) LS 2.2L No Start VIN: 1G1ND52F94
U1000: loss of serial data for class 2. At the ignition module intermdiate connector (this is where the module hooks to the coil tower) the noid light either doesn't flash or is dim and will not run. If the light is bright it runs. The issue seems to be the control (ground) ciruit for the coils is n...
June 19, 2013
2004 Chevrolet Classic (Car) LS 2.2L No Start VIN: 1G1ND52F94
U1000: loss of serial data for class 2. At the ignition module intermdiate connector (this is where the module hooks to the coil tower) the noid light either doesn't flash or is dim and will not run. If the light is bright it runs. The issue seems to be the control (ground) ciruit for the coils is n...
June 25, 2013
2004 Chevrolet Classic (Car) LS 2.2L No Start VIN: 1G1ND52F94
U1000: loss of serial data for class 2. At the ignition module intermdiate connector (this is where the module hooks to the coil tower) the noid light either doesn't flash or is dim and will not run. If the light is bright it runs. The issue seems to be the control (ground) ciruit for the coils is n...
June 19, 2013
2004 Chevrolet Classic (Car) LS 2.2L No Start VIN: 1G1ND52F94
U1000: loss of serial data for class 2. At the ignition module intermdiate connector (this is where the module hooks to the coil tower) the noid light either doesn't flash or is dim and will not run. If the light is bright it runs. The issue seems to be the control (ground) ciruit for the coils is n...
June 25, 2013