HELP! EGS line disturbed - No CAN Communication

[jopecasa]

Good Day!

My X5 went on Limp mode and Trans fail safe flashed on cluster.

Died on uphill while I was flooring it around 90kmh.

Got stuck on a very dangerous bend and had to get the missus out and placed her safe and secure....she's not happy!

Tried to start... nothing!

Tried calling for a tow truck and unfortunately they said they'll be here in an hour and 45 minutes..ugh!

So I checked and lifted the bonnet....motor looks good and no funny smell.

No diagnostic pc with me at the time....

After 40 minutes waiting ....tried again....fired up and started...but

trifecta lights.....TMPS .....engine light...airbag light...suspension inactive..and so on...sheesh!

So i drove really slow and avoided traffic and took the back roads.

Finally got home and loaded INPA and scanned for errors.....

No Communications on DME - LEW - DSC - etc...

But cluster and and other modules not on the Power Train CANBUS all working.

INPA IM readout ---- came out as EGS line disturbed - No CAN
Communication.

First checked relay and fuses...ALL good.

Battery and alternator - OK ---voltage stable


Disconnected the following in order:

1 Steering angle sensor - no good
2. ABS module - no good
3. DME - no good

not yet done:
Mechatronic connector
YAW sensor
other modules?

So tired and frustrated ....and will check again tomorrow morning.

Please help this is the first time ....Betsy(X5) let me down.


Sorry for the long post...

[Purplecty]

What is the exact error from INPA? Here is a picture of mine when the ABS Module went bad...

[jopecasa]

@Purplecty

My ISTA laptop is not working and cannot run diagnostic...

Used my INPA and BMW scanner and almost the same errors except for the radio - Seat - DSP.

I've the disconnected three modules and will carry on troubleshooting early morning tomorrow.

ABS module already disconnected.... but still no CAN.....

[Purplecty]

Post pics of the INPA Errors

[upallnight]

Any other problems prior to this like hard or long cranking for the engine to start?

[jopecasa]

@upallnight

No issues on cranking and starting....fires up straight away BUT running rich/rough idling due to limp mode.

Disconnected Yaw sensor-- no good

Still Canbus issue - no communication

Just stopped for lunch....and will disconnect soon Mechatronic connector.

[upallnight]

Originally Posted by jopecasa

@upallnight

No issues on cranking and starting....fires up straight away BUT running rich/rough idling due to limp mode.

Disconnected Yaw sensor-- no good

Still Canbus issue - no communication

Just stopped for lunch....and will disconnect soon Mechatronic connector.

Limp mode does not cause the engine to run rough or rich. Limp mode put the trans in 3rd so acceleratiion is slow since you are accelerating from 3rd gear.

Something else is the problem for the rich/rough running.

Try this and tell me what happen, Pull down the visor and open the mirror cover so that the vanity lights come on. Anything unusual? Turn on the radio does it play?

[jopecasa]

@upallnight
Thanks! I've tried this ...nothing unusual...I've got NBT retrofit on my X5 though


Anyways this is were I'm at now.:

Disconnected the following in order and still no Canbus

1 Steering angle sensor
2. ABS module
3. DME
4. Mechatronic connector
5. Yaw Sensor
6. Valvetronic module
7. ..........Have I'missed out on any module?

Working Instrument cluster was temporary disconnected ...still no luck.

I don't know what's causing my no communication...there must be an open or short in the PT CAN

Next up.....Grounding Points...Anyone can help with their location?

My X5 is a mess now....plastic parts are everywhere......big mess.



I need to get ISTA working ...just to rule out INPA and BMW Scanner.....and K-Dcan cables.

[tmat1977]

i had same problem,, change your transmission oil thermstat (do to transmision oil getting to hot cause me to go to limp mode), i also change my pans service and filter have not had a problem since

theres a place in jacksonville fl that re builds LCM for 130 bucks called module experts ask for andy bell

if you need parts call North side imports ask for adam my bro in law i get all my parts from him

and then theres auto truck and accessiors in palm beach florida too that did my abs Module that i found on ebay

[jopecasa]

@tmat1977

Ok....will look into the this.

Not sure though of location.....don't know if my 4.8is has one?