Causes and Fixes Nissan U1000 Code: CAN Communication Line Signal Malfunction

How to fix Nissan U1000 engine Code: CAN Communication Line Signal Malfunction
The CAN (Controller Area Network) is a protocol that allows the TCM and ECM modules, as well as other devices, to communicate with each other.
Possible Causes of a Nissan U1000 Code:
Controller Area Network (CAN) communication harness is open or shorted
Faulty Transmission Control Module (TCM)
Faulty Engine Control Module (ECM)
Poor harness ground connection.
What to Check
Battery Terminal and Cable Connections
Relay or Fuse: Engine Control - TCM - ECM
Wiring Open or Short
Damage to Transmission
www.backyardmechanic.org
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[@JonathanRogers1982]

This code popped up when the SLIP light came on. It came on after I changed the horn relay without first disconnecting the battery. They battery terminals were very corroded so I changed those and no luck. So... Slip light on, the 4x4 diagram that normally shows 2wd or 4wd isn't showing, just the SLIP light now. I checked brake fluid level and tires are inflated well ... Forums say to do that. No issues there and no issues on pads or wheel sensors. I can check the fuses like this video suggests but wondered if unhooking the negative terminal overnight might do the trick? Or something else? I am trying to separate this issue from the horn relay change which didn't fix the no horn issue but it's hard to disconnect the two as the latter happened right after switching it out. Thoughts or ideas?

[@JonathanRogers1982]

Liked the video. I have this code showing and the SLIP light on after changing the horn relay. If you can try and answer my questions I'll give you the full story....?

[@DEADWRONGx]

He doesn't care. They post videos for views and likes and subscribers

[@GenesyPitero]

I have some cut wires going to the fues box can that be the reason my car wont start

[@davidjenkins8631]

You have told me what I need to know when my 2013 Nissan Sentra goes to the dealership. I was lucky to have a mechanic friend who paid thousands of dollars to read Nissan codes. My little scanner just showed needs Mass air flow sensor but Nissan did too so I bought a Nissan MAF. Now I read the there is a bulletin out to have these checked on certain Nissans and mine is one. But Nissan won’t pay to repair because it’s not a recall. Can you tell me why they won’t or will they?

[@xbriginalx7048]

I have a 2019 Nissan Titan that is throwing this code. Here recently I’ve been having some electrical issues from my truck not starting, my bright lights not working, my interior lights going off and on, truck not turning off once before. Has me worried of serious issues

[@legin3753]

did u figure it out

[@uploadtime1780]

My armada is doing this right now.. it won't turn off. Did you end up figuring it out?

[@legin3753]

@@uploadtime1780 i didnt i have a guy coming out this week i got wiring harness see if that helps if not im gonna scrap it really clean nissan nv200 2012 only 120k miles

[@OkaOmojesu]

Ok

[@hariranormal5584]

could be a whole OBD network failure which makes modules hard to communicate with each other

[@JonathanRogers1982]

Checked all the wires no damage, no ground corrosion, still have the slip light and u1000 code

[@JohnZornAscended]

Modules are probably old. Not the best construction.

[@danielporter4646]

Very helpful thank you

[@ibrahimalhammadi1846]

Thank u!!

[@legin3753]

i have this code on 2012 nissan nv200 iv changed wiring harness ecu bcm and ignition same fault dash lights come on but it wont crank doesn't even click when i turn ignition im at a loss when i scan it says engine not present just get the u1000-00 u1000-01 codes

[@jonomotive2000]

Change the battery on your key fob

[@legin3753]

I have tested the ignition immobilizer coil I'm not getting a reading off it withautel km100 I'm gonna read eeprom off old ECU and write it to new one hopefully it works

[@deanthonydavis4163]

Did it ever work?

[@legin3753]

Waiting on proper programmer to come

[@303adrianarian9]

@@legin3753did you get it fixed? My son has 2011 Rogue. We can’t turn ignition it says key not detected like it’s wrong key. Tried reprogramming they key and no luck. Locksmith showed that u1000 code

[@elcucuygarage]

2012 Nissan NV2500. Randomly left stranded one day, cranks but no start, vehicle stuck in immobilizer/anti theft mode. New battery, recall relay, ipdm function test, scanned with IP616 otofix and unable to complete further tests or diagnostics outside of U1000/U1000-00 and a BCM code.

[@JohnZornAscended]

All the modules talk to one main brain module. If there isn’t any short I’m willing to bet that’s the culprit. Since it sends multiple U1000 codes for different modules. No way all of them are malfunctioning.

[@CensoredbyYouTube-1955]

Possible bad battery

[@graysonhunter4432]

I have a 2013 Nissan Navara and only right side of my indicators are working i cant for the life of me find what it is, i snapped an electric wing mirror off and i guess the wire shorted when i did but the bulbs arent blown

[@eddyerodriguez8259]

That has to be the best straight to the point makes perfect sense video thank you my friend 🫵🏽🤜🏽

[@dfrancofranco2135]

I have 2016 Nissan Maxima getting this code . When drives car won’t accelerate, when pressing a gas pedal.

[@alexgusev8173]

Same issue did you find out what it was?

[@FrootLoops-lo1rl]

Did you figure it out? lol

[@GearJamminHank]

Yeah, what these guys said...did you figure it out?

[@JohnZornAscended]

Probably a throttle position sensor. Spray it with some contact cleaner In it’s plug.

[@poppaflex3999]

100 percent

[@ELEVOPR]

Good stuff, thanks for sharing. I'm trying to figure this out myself if its an easy swap of a relay or even an ECM I don't mind doing it. Time are hard and I am on a fixed income :o/ Is an IPDM a simple swap? Im getting these issues, as well as Gauges Dropping, AC blowing hot air, Then transmission seems to not want to change and when it does it kicks like a horse. leading me to believe all these things happening at the same time could be a bad ECU relay or IPDM ? Here is a link of my Dash going crazy when I Drive. kzbin.info/www/bejne/ZmSopnp_baujjM0 Below are the codes I pulled. instrument Cluster- U1000 Can Communication Circuit Transmission Control- U1000 Can Comm Circuit, P1705 TP Sensor Anti-lock Brake- U1000, Can Comm Circuit ECM (Engine Control Module)- U1000, P1212, U1001 AWD (All Wheel Drive) - U1000 Can Communication Circuit

[@gevorgkartashyan3991]

Nisan march u 1000

[@gevorgkartashyan3991]

2003 god

[@goofydonald2983]

Magnifico

[@AlloyedFrequencies]

Thank you very much for your help.