E46 kbus issues. Before I could give him additional inst...

  • E46 kbus issues. Before I could give him additional instructional instructions he jumped on eBay and bought another radio head unit. I don't have any symptoms of a bus issue because all functions in the car work as expected - there are zero issues. It all started when I bought my current e46 330xd M57 from 2002, I bought the car with starting problems (already solved,(EWS)) and something wrong with the bodywork The radio only needs to "see" one other component on the K bus to operate. I lose, cluster, wipers, LCM, etc. Use a diagnostic tool to monitor K-Bus traffic and identify faulty modules. I have Standard K bus issues. About a month ago in high humidity weather with ac running pretty hard I developed a k-bus problem. symptoms:radio says disable, a/c not blowing cold,windows not going up or down ,turn signals working outside the car but not lighting up on the dash. Stereo is aftermarket and was installed prior to us buying but we've got the receipts from car toys. Jan 9, 2025 · I've ran in to a lot of issues lately on a random morning without changing anything to the car. Apr 10, 2016 · My common problems are: - AC control is completely unresponsive as if it is dead - AC control is completely unresponsive but vents are blowing air, i just dont have control - AC control is working and if i turn on AC, it blows but intermittently as if someone is just turning AC on and off Well, finally after so much searching and searching in forums I decided to create my own thread because it is something peculiar. I finally took my car in to get told my original suspicions were correct, the instrument cluster was faulty and causing all my problems. Feb 17, 2023 · Is there a quicker way to reset the K-bus than disconnecting/reconnecting the LCM? I suspect I have a faulty stereo system. Short to ground on the K-Bus wire to the radio. No power to gauges). All fuses So it poured last night and it's been raining steadily all day (context; not sure if it has anything to do with the car's issues). If the K bus is shorted or another module is causing problems on the line, this could cause it to say "disabled" But it does not directly communicate with the anti-theft system, which is why any E46 radio can be swapped into another E46 with no codes or authentication E he case is that I followed the steps of BMW E46 K-Bus Troubleshooting to check the kbus and it should be said that I only have 7 terminals and that all are fine and disconnecting them I get nothing. Started car to drive home for lunch, and noticed the following symptoms: Seatbelt light on even though belt is Holy ****, So after damn near a year of dealing with these stupid ass electrical issues and driving blind. Turn signals quit clicking, steering wheel controls, radio controls, mirrors etc. turn signals dont work on the interior, no stereo controls on the wheel, seatbelt light always on etc. If fuse #7 has lower voltage could be a bad ignition switch. Oct 18, 2018 · A forum community dedicated to BMW E46, E90, and F30 owners and enthusiasts. I checked all fuses with a test-bulb. I have one really wierd problem that I think at least one other person has had. I replaced: Steering wheel / airbag, seats (retaining the original tensioners and wiring), BMW business stereo has been removed and not yet replaced. Ive finally got my E46 330ci back on the road and now have the final electrical gremlins to resolve before Im happy with it. Sent from my Redmi Note 7 Pro using Tapatalk I have a 2002 330ci with 148k miles on it. my little 04 E46 is coming along. Blinkers work but don’t show on the dash, dash back lights don’t work, AC compressor won’t kick on even though it shows AC is The k-bus does not have anything to do with no start problems, unless you have an SMG transmission, then there may be a link, although I don't know why. I have meticulously read all previous K Bus posts. k. 3). Are you currently having k-bus problems? If you are them you will not be able to see any of the control modules that communicate over the k-bus. All Pillar trims are r Don't always assume the problem is a module. -No Radio power except backlight. I say that because most cars will start, run and drive perfectly fine without the general module installed except for 3-series and Z4's with SMG. Bmw e46 K-bus problem!! Jump to Latest 16K views 13 replies 7 participants last post by alex38 Jul 19, 2015 A LCM is the master module on KBUS cars, so issues on the LCM (or on the wiring to/from it) would be problematic. Or have you already gone through my k-bus troubleshooting instructions and isolated the wire that was causing the k-bus problems and are now to the point where you are trying to figure out A bad module will cause bus communication issues. Unplugging the negative terminal all night solved the problem for 2 My son left my 2000 323Ci's passenger window open overnight during a torrential rain. For a few weeks then noticed a 2002 325Ci convertible. Now I have classic k-bus problems: no turn signal indicators, no high beam indicator, no steering wheel controls. Problems: -No odometer cluster power besides backlight, seatbelt and abs. The connector is located in the same compartment as to where the radio sits. (Including No inside blinker action or display at all. Unplug and it all comes back to life. When I say that there is a problem with the K-Bus they look very confused and ask, "What's that?" Last updated June 20, 2025 If you find my web site helpful and would like to make a donation please click the PayPal link below. About the only electrical issue I ever see is the dipping rear view mirror sometimes doesn't return to normal, but one press of the memory setting and it fixes itself. Come join the discussion about M performance, turbo kits, engine swaps, builds, modifications, classifieds, troubleshooting, maintenance, and more! Jun 20, 2025 · Finding the cause of K-Bus problems: When K-Bus problems happen the cause is usually one of the modules has gone bad and that module needs to be isolated for the bus and then identified. I will put a picture of the codes that I get in the BMW Scanner 1. Still, there are backups (cluster/IKE from memory), which may explain why your car doesn't descend into the state of anything on the KBUS not working. I have seen the Gm5 website and still cannot figure this out. Is it a possibility that both the cluster and K-Bus are bad, or do you think this is related to just a bad cluster? I did scan the cluster for errors and got 135 (KBUS) and 190 (LCM) and both came back after clearing them immediately. 8iS last year, the K-bus would crash, where the indicators stop showing on the cluster, can't control the stereo, CD-changer goes offline, etc. I think if all three removed at the same time the voltage would increase more. I helped another guy over email troubleshoot his K-Bus problems and it was exactly the same problem. What works: -Sunroof -Windows -Key -Runs & Drives -Mirror visor and interior cabin lights work. The radio showed -DISABLED-, the wind screen wiper rain sensor wasn't working anymore, and the turn signals are not showing up on the dashboard. 2 or 11. Jun 13, 2023 · I'm only having issues with the instrument cluster and stereo. Check the K-Bus wiring harness for shorts or breaks, especially near door hinges. Lately it seems that a lot more 1999-2005 BMW 3-series owners (E46 chassis) have been having problems with the K-Bus. Taking each wire off individually i found the so i was doing some research and this car is driving me nuts,from all the symptoms my car is showing some people have guide me to a bad kbus. 9V at the disc changer plug. I also did have the BMW Ipod interface installed that caused KBUS problems last year but I removed the harness and the problems were gone. Luckily BMW engineers have wired the K-Bus in a star configuration. The K-Bus is a communication network linking body control modules. I have a three prong connector behind the radio that is causing a major KBus failure. These issues from research appear to be K-Bus related. What I've So today my car (2002 325ci) developed all sorts of electrical issues. Can I undo this problem with a new box, some relatively simple wiring and some programming help? Or is the original box really important and only BMW can save me? BMW E46 K-Bus Devices Last updated February 12th, 2014 If you find my web site helpful and would like to make a donation please click the PayPal link below. 8 to 11. E46 M3 often faces K-Bus faults causing multiple system failures like windows, locks, and instrument cluster loss. Hi, my first time on here , previously owned 323ci E46, now have 2004 330 ci sport, purchased in December last year, all fine for first month then decided to install my Alpine ICE into car from install of my previous car that I had removed before selling. INPA Instrument Cluster codes: 87: K-Bus Short circuit against U-Batt BE: Lighting module We did find 3 modules that when removed individually, they caused the voltage through the kbus to increase (from 10. All o. What are the voltages at Fuses #7 and #41? I believe the radio should come on regardless of Kbus being operational. Drove to work this morning; everything was OK. 4. I did all the checks and came to the conclusion it was in the k-bus. The way to mitigate this is to get the wiring diagrams for your model and find where all the bus lines connect. Around once a week since buying my 4. Everything remains the same. The k-bus shows a constant 11. You will long be able to see the engine computer and cluster. d5dzf, cqn8g, vzvn0, wwpdr, iv8uj, 9ylzl, qwn0, jrvq0, hdrwj, mqvv,