Guest Posted December 13, 2010 Report Share Posted December 13, 2010 Ok guys, I'm hoping someone on here is a Nissan Tech or has a friend that is. I've got a 2006 Nissan Xterra with the U-1000 DTC. I've read up on it, seems to be a bad ground connection somewhere that causes electronic havoc, no start etc. Internet forums say its some ground wire that comes lose, gets corroded or something. Anyone here know anything more specific about this I'm not trying to disassemble the entire truck looking for that ground wire. Link to comment Share on other sites More sharing options...
Bag-O-Chips Posted December 13, 2010 Report Share Posted December 13, 2010 I'm no Nissan Tech, But a Former Mercedes-Benz tech. The U code you're dealing with is a CAN communications failure...U1000 SCP (J1850) Invalid or Missing Data for Primary Id. DTC U1000 CAN COMMUNICATION LINE PFP:23710Description ECS00AWYCAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplexcommunication line with high data communication speed and excellent malfunction detection ability.Many electronic control units are equipped onto a vehicle, and each control unit shares information and linkswith other control units during operation (not independent). In CAN communication, control units are connectedwith 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmissionwith less wiring. Each control unit transmits/receives data but selectively reads required data only.On Board Diagnosis Logic ECS00AWZ This is an OBD-II self-diagnostic item. Diagnostic trouble code “U1000 CAN COMM CIRCUIT” with CONSULT-II is detected when TCM cannotcommunicate to other control units.Possible Cause ECS00AX0Harness or connectors(CAN communication line is open or shorted.) First thing is first, check all your Connectors, Grounding points, proceed to check the CAN Bridges/Bus bars, . Verify there is no GFS/WFS (green fuzzy crap / white fuzzy crap). When all those check out step 2... Check the communications network circle, basically any wires in a twisted pair are going to possibly be CAN wires. Hope this helps some. -Chips Link to comment Share on other sites More sharing options...
Bag-O-Chips Posted December 13, 2010 Report Share Posted December 13, 2010 I definately forgot to mention, look around the door sill and foot well areas. I've seen water/moisture disable $100k cars like there was no tomorrow. Link to comment Share on other sites More sharing options...
Metric-man Posted December 13, 2010 Report Share Posted December 13, 2010 Ok guys, I'm hoping someone on here is a Nissan Tech or has a friend that is. I've got a 2006 Nissan Xterra with the U-1000 DTC. I've read up on it, seems to be a bad ground connection somewhere that causes electronic havoc, no start etc. Internet forums say its some ground wire that comes lose, gets corroded or something. Anyone here know anything more specific about this I'm not trying to disassemble the entire truck looking for that ground wire. Does he have a cell phone? tell him to turn it off, shut the door lock the truck wait 5 minutes . keep the cell phone off try starting the truck again. if that doesn't work look under the driver seat for a wire harness module or bounce up and down in the driver seat w/ the key on. if that doesn't work disconnect the alternator... Is the cruise control switch accidentally turned on ? clear the codes and recheck to see if any others come up. Link to comment Share on other sites More sharing options...
Metric-man Posted December 13, 2010 Report Share Posted December 13, 2010 It doesn't need to be "A" ground wire it can be "any" grounded wire or CAN system Link to comment Share on other sites More sharing options...
Bag-O-Chips Posted December 13, 2010 Report Share Posted December 13, 2010 yup, what Cult said, non complicated way like I did. the communication circle is broken somewhere and the Bus bars/ CAN bridges are usually the grounding junctions too. about 3-5 twisted pairs go into each of those Bus/Bridges. Link to comment Share on other sites More sharing options...
Metric-man Posted December 13, 2010 Report Share Posted December 13, 2010 (edited) yup, what Cult said, non complicated way like I did. the communication circle is broken somewhere and the Bus bars/ CAN bridges are usually the grounding junctions too. about 3-5 twisted pairs go into each of those Bus/Bridges. It could be something really simple like coins (loose change) the fell between the seat or wedged in a stereo component.but the transponder key is being interfered with by an electrical device I have a Tacoma and my old cell phone wouldn't let my stereo turn on or it would turn the stereo on for me.. weirdI got a different cell phone. Edited December 13, 2010 by starion_cult Link to comment Share on other sites More sharing options...
Bag-O-Chips Posted December 13, 2010 Report Share Posted December 13, 2010 Cult are we on the same page? lol Body CAN :ignition switch -> Body control-> Central locking -> Radio -> SRS Link to comment Share on other sites More sharing options...
Metric-man Posted December 13, 2010 Report Share Posted December 13, 2010 If you had a hand held radio with and external antenna you might be able to locate the short that's causing the interference. A fuse or a module that has significant voltage to it with the ignition switch, cancels out the key chip. Link to comment Share on other sites More sharing options...
Metric-man Posted December 13, 2010 Report Share Posted December 13, 2010 (edited) Cult are we on the same page? lol Body CAN :ignition switch -> Body control-> Central locking -> Radio -> SRSyeah totally "communication" I wasn't quoting your stuff just throwing in my explanation. I'm glad I never got a Nissan. Edited December 13, 2010 by starion_cult Link to comment Share on other sites More sharing options...
Metric-man Posted December 13, 2010 Report Share Posted December 13, 2010 yup, what Cult said, non complicated way like I did. the communication circle is broken somewhere and the Bus bars/ CAN bridges are usually the grounding junctions too. about 3-5 twisted pairs go into each of those Bus/Bridges. It could be something really simple like coins (loose change) the fell between the seat or wedged in a stereo component.but the transponder key is being interfered with by an electrical device I have a Tacoma and my old cell phone wouldn't let my stereo turn on or it would turn the stereo on for me.. weirdI got a different cell phone.Oh yeah I did , sorry I clicked the wrong reply key... Link to comment Share on other sites More sharing options...
Metric-man Posted December 13, 2010 Report Share Posted December 13, 2010 (edited) I think the truck ate louswheel01... Edited December 13, 2010 by starion_cult Link to comment Share on other sites More sharing options...
Bag-O-Chips Posted December 13, 2010 Report Share Posted December 13, 2010 basically if you combine what you and I both mis interpreted Hahahaha! you can follow the whole CAN network with a walkie talkie you can listen in for a fuzzy sound or you can always break out the logic probes... LOL the truck is chewing on Lou's head as we speak. Link to comment Share on other sites More sharing options...
UlrichWolf Posted December 13, 2010 Report Share Posted December 13, 2010 Grab a FSM for it HERE Check grounding points E24, E106, and the battery cable itself. Tim Link to comment Share on other sites More sharing options...
ucw458 Posted December 13, 2010 Report Share Posted December 13, 2010 I'm no Nissan Tech, But a Former Mercedes-Benz tech. The U code you're dealing with is a CAN communications failure...U1000 SCP (J1850) Invalid or Missing Data for Primary Id. DTC U1000 CAN COMMUNICATION LINE PFP:23710Description ECS00AWYCAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplexcommunication line with high data communication speed and excellent malfunction detection ability.Many electronic control units are equipped onto a vehicle, and each control unit shares information and linkswith other control units during operation (not independent). In CAN communication, control units are connectedwith 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmissionwith less wiring. Each control unit transmits/receives data but selectively reads required data only.On Board Diagnosis Logic ECS00AWZ This is an OBD-II self-diagnostic item. Diagnostic trouble code “U1000 CAN COMM CIRCUIT” with CONSULT-II is detected when TCM cannotcommunicate to other control units.Possible Cause ECS00AX0Harness or connectors(CAN communication line is open or shorted.) First thing is first, check all your Connectors, Grounding points, proceed to check the CAN Bridges/Bus bars, . Verify there is no GFS/WFS (green fuzzy crap / white fuzzy crap). When all those check out step 2... Check the communications network circle, basically any wires in a twisted pair are going to possibly be CAN wires. Hope this helps some. -Chips Uhhh, you talkin about a car there or fuzzy logic? As in I'm kinda fuzzy about making any logical sense out of that statement. I think I'll stick to older cars. Much simpler machines. Link to comment Share on other sites More sharing options...
Guest Posted December 13, 2010 Report Share Posted December 13, 2010 basically if you combine what you and I both mis interpreted Hahahaha! you can follow the whole CAN network with a walkie talkie you can listen in for a fuzzy sound or you can always break out the logic probes... LOL the truck is chewing on Lou's head as we speak. Naaaaahhh, Not chewing on me just yet. I was just quenching my thirst with 64 ounces of malt liquor beverage! The truck belongs to my neighbors youngest daughter....she's gratefull I'm taking the time to help lol No, just kiddng, nothing like that. The wife would literally kill me. I will look at the connections near ECU, it's under the hood. Link to comment Share on other sites More sharing options...
Bag-O-Chips Posted December 13, 2010 Report Share Posted December 13, 2010 Naaaaahhh, Not chewing on me just yet. I was just quenching my thirst with 64 ounces of malt liquor beverage! The truck belongs to my neighbors youngest daughter....she's gratefull I'm taking the time to help In Coke's famous words, "Pics or Ban" lol Link to comment Share on other sites More sharing options...
boostinstar Posted December 15, 2010 Report Share Posted December 15, 2010 does she want to sell it? Link to comment Share on other sites More sharing options...
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