this was very helpful, Im going through something like this right now on a 2011 328i. Has a bunch on kcan faults. took the whole car apart finally, found water under the driver side carpet unplug the kcan line near the driver side dead pedal and cluster started working normally. Hopefully find the issue soon. Going on day two of diagnoses
Hey man, appreciate the super detailed video and adding a new tool kit to my arsenal! I’m having a similar issue on a 2006 BMW 530xi where the ignition, Instrument Cluster, iDrive, Radio, essentially everything except for locks and lighting not working throughout the car. Did you end up finding the short to ground? I’m curious where the short to ground was found even though it is an E90 it may help me find out what is going on with my E60. Also having some symptoms of parasitic draw if the battery remains connected overnight which makes me feel like the car isn’t going to sleep.
In your situation I would look in the trunk under the spare tire. There are modules there that can affect the bus line. Also, the battery sensor on the negative cable can also affect the bus line. Usually the most suspicious areas are areas that get wet.
I have kind of similar problem . After a two month a car was siting it was cranking a litle ruff when i came and buy a new agm battery then i noticed for a moment i cant open a window 5 mins all where fine then i cant lock the car sometimes the problem fixed by itself after a wihle my key wasnt able to unlock the car i paired it again but when i tryed tolock unlock sometimes corner lights wasnt working . After that came airbag problem later a abs and traction contorl. Then i was scared what is happening here went to mechanic and he sed i cant do nothing i cant conect to any modele in the body class. After that i came home and removed the carpet it was kind of wet then fixed the holes near back of the window and engine cpu water was coming over. And then i instaled impa instumental cluster showed k-bus short l IKI-EEPROM-Fehler, Codierung fehlerhaft/unvollstaendig Lichtmodul-EEPROM-Fehler then i picked yellow red white wire from rain sensor and cheked the ground yes its grounded to car with 40omh and after that i diskonected each module from the car but nothing helped after i checked x939 box there was i-bus wires and 2 of 6 was shorted a riped them apart and taped them. And now i still diging and trying to find any clue. Tomorow ill take all carpets and try dig deeper. Any advice?
this was very helpful, Im going through something like this right now on a 2011 328i. Has a bunch on kcan faults. took the whole car apart finally, found water under the driver side carpet unplug the kcan line near the driver side dead pedal and cluster started working normally. Hopefully find the issue soon. Going on day two of diagnoses
Hey man, appreciate the super detailed video and adding a new tool kit to my arsenal! I’m having a similar issue on a 2006 BMW 530xi where the ignition, Instrument Cluster, iDrive, Radio, essentially everything except for locks and lighting not working throughout the car. Did you end up finding the short to ground? I’m curious where the short to ground was found even though it is an E90 it may help me find out what is going on with my E60. Also having some symptoms of parasitic draw if the battery remains connected overnight which makes me feel like the car isn’t going to sleep.
In your situation I would look in the trunk under the spare tire. There are modules there that can affect the bus line. Also, the battery sensor on the negative cable can also affect the bus line. Usually the most suspicious areas are areas that get wet.
do you just look for any twisted pair wires, or did you have electrical circuit diagrams / layout diagrams
I have kind of similar problem . After a two month a car was siting it was cranking a litle ruff when i came and buy a new agm battery then i noticed for a moment i cant open a window 5 mins all where fine then i cant lock the car sometimes the problem fixed by itself after a wihle my key wasnt able to unlock the car i paired it again but when i tryed tolock unlock sometimes corner lights wasnt working . After that came airbag problem later a abs and traction contorl. Then i was scared what is happening here went to mechanic and he sed i cant do nothing i cant conect to any modele in the body class. After that i came home and removed the carpet it was kind of wet then fixed the holes near back of the window and engine cpu water was coming over. And then i instaled impa instumental cluster showed k-bus short l IKI-EEPROM-Fehler, Codierung fehlerhaft/unvollstaendig Lichtmodul-EEPROM-Fehler then i picked yellow red white wire from rain sensor and cheked the ground yes its grounded to car with 40omh and after that i diskonected each module from the car but nothing helped after i checked x939 box there was i-bus wires and 2 of 6 was shorted a riped them apart and taped them. And now i still diging and trying to find any clue. Tomorow ill take all carpets and try dig deeper. Any advice?