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U1000 Diagnostic Trouble Code Discussion for October 2009

Class 2 Communication Malfunction


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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2005 Nissan Maxima SE 3.5L No Start VIN: 1N4BA41E45
U1000: Controller Area Network Line Malfunction. This one got towed in and will not restart;no spark,no injector pulse. The cooling fans both run anytime the ignition switch is in on position;this should be a good indicator but I found no reference to it in the fixes section. I have checked the ground cable ...
October 19, 2009
2002 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JF52F23
U1000: Class 2 Communication Malfunction. vehicle was test driven several times for a total of 55 miles. returned to customer as fixed. cust returned 3 days later 100 more miles and stated all dash lights coming on again. codes u1016-1064 and 1088 returned. sdm burned again. could a loss of ground cau...
October 20, 2009
2002 Saturn L200 2.2L Stall, no security lamp VIN: 1G8JU54F22
U1000: Class 2 Data Link Malfunction - ID Not Learned. Car starts then stalls ckp cam sensors still show good readings. injector pulse stops engine stalls installed new module no change new temp sensor no change. can any body give a direction to go
October 21, 2009
2005 Chevrolet Equinox LS 3.4L Stall, MIL Lamp on VIN: 2CNDL23FX5
U1000: class 2 serial data link. ... and these codes stored u2100,u1000,p1626,u0140, u0121. vehicle does stall, when tried to restart, 1st time engine will crank will not start 2nd time will not crank, 3rd time cranks and starts. does not do it all the time. check the communications line coul...
October 28, 2009
2005 Chevrolet Equinox LS 3.4L Stall, MIL Lamp on VIN: 2CNDL23FX5
U1000: class 2 serial data link. ... and these codes stored u2100,u1000,p1626,u0140, u0121. vehicle does stall, when tried to restart, 1st time engine will crank will not start 2nd time will not crank, 3rd time cranks and starts. does not do it all the time. check the communications line coul...
October 29, 2009
2004 Chevrolet Silverado 2500 HD 6.0L No Start VIN: 1GCHC29U94
U1000: Class 2 Communication Malfunction. ... tech2 and found that i could not communicate with the srs, body and ipc. all the other systems would respond. the instrument cluster was blank so i had another cluster in the shop and when i plugged this in i was able to communicate with ipc and all segmen...
October 30, 2009
2005 Nissan Maxima SE 3.5L No Start VIN: 1N4BA41E45
U1000: Controller Area Network Line Malfunction. This one got towed in and will not restart;no spark,no injector pulse. The cooling fans both run anytime the ignition switch is in on position;this should be a good indicator but I found no reference to it in the fixes section. I have checked the ground cable ...
October 19, 2009
2002 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JF52F23
U1000: Class 2 Communication Malfunction. vehicle was test driven several times for a total of 55 miles. returned to customer as fixed. cust returned 3 days later 100 more miles and stated all dash lights coming on again. codes u1016-1064 and 1088 returned. sdm burned again. could a loss of ground cau...
October 20, 2009
2002 Saturn L200 2.2L Stall, no security lamp VIN: 1G8JU54F22
U1000: Class 2 Data Link Malfunction - ID Not Learned. Car starts then stalls ckp cam sensors still show good readings. injector pulse stops engine stalls installed new module no change new temp sensor no change. can any body give a direction to go
October 21, 2009
2005 Chevrolet Equinox LS 3.4L Stall, MIL Lamp on VIN: 2CNDL23FX5
U1000: class 2 serial data link. ... and these codes stored u2100,u1000,p1626,u0140, u0121. vehicle does stall, when tried to restart, 1st time engine will crank will not start 2nd time will not crank, 3rd time cranks and starts. does not do it all the time. check the communications line coul...
October 28, 2009
2005 Chevrolet Equinox LS 3.4L Stall, MIL Lamp on VIN: 2CNDL23FX5
U1000: class 2 serial data link. ... and these codes stored u2100,u1000,p1626,u0140, u0121. vehicle does stall, when tried to restart, 1st time engine will crank will not start 2nd time will not crank, 3rd time cranks and starts. does not do it all the time. check the communications line coul...
October 29, 2009
2004 Chevrolet Silverado 2500 HD 6.0L No Start VIN: 1GCHC29U94
U1000: Class 2 Communication Malfunction. ... tech2 and found that i could not communicate with the srs, body and ipc. all the other systems would respond. the instrument cluster was blank so i had another cluster in the shop and when i plugged this in i was able to communicate with ipc and all segmen...
October 30, 2009