2006 530xi

This is another one. Priority of the failures I suppose.

donpb

Did you check to see if your car is consistently going to sleep? I connected an ammeter in series with the battery to test mine.

2006 530xi

When ever I checked it, it goes to sleep. When this happens, it is Fast. I will be driving, then stop go get coffee or something, and then it won't start. I carry a Jumper Battery with me now.

If the IBS is bad, it would throw a code? I have a feeling bunch of modules were hit with something. Based on how the Tail Hitch module was burnt up. I know I have multiple module faults, . The big issue I have right now is that I need to pass my Emission test in March and ieverytime I unlock the car, I can hear my CD changer going through its boot sequence. Almost like my entire communication resets which could also reset the DME and mess with my drive cycle.

seanjordan20

Ok so you posted a screenshot of the ISTA tree but didn't post the code list. Hook up ISTA and clear the codes. Then run the test again and post which codes that came right back without driving the car or opening or closing the doors. You should be in the car with the door closed. Also post the pic of the tree

Also you have no communication with a few modules especially some that you should have communication with. Check your connection settings to see if it is wrong. Your DWA should be reading.

We have to start from the beginning. The A0B2 error in the CAS looks like where you need to focus. Check in the battery area for bent, corroded or loose cables

2006 530xi

seanjordan20, These constant Snow storms is a problem right now. I will erase the code. I have to work during the week with crazy hours. Just one question, when I do this, Is the Engine running or do I need to be in Accessory Mode and Engine not running. External 12V Stabilizer hooked up?
I appreciate your assistance.

donpb

You don't need the engine running to clear all codes.

donpb

@seanjordan20 Can ISTA read the charge discharge histogram? That's where I'd be looking. There's an assumption that the battery is doing just fine before this all happens but how would you know if you've not measured the battery voltage? Yeah the low discharge notification isn't showing at the time but the battery voltage could be right on the cusp though.

seanjordan20

Yea ISTA can should discharge histogram but I'm assuming the OP is paying attention to the battery charge and have tested to make sure the battery and alternator is good (troubleshooting 101 on BMWs). If there is a high discharge there would be an error no matter the charge. This is one of the reasons I want to focus on the CAS. I sucks that the OP is not close so I can can troubleshoot.

seanjordan20

No the car does not need to be on. You can post one with the car on and off (in the II position) if you'd like to give a better picture. That will let us know a lot. A stabilizer is not need of your just doing a clear and run. Just make sure the lights are off, HVAC is off and door is closed so there is no extra stuff drawing power.

What type battery do you have in you car? Was it programmed when installed? Have you checked the power cable leading from the battery to the alternator for corrosion? Make sure you upload the error list from ISTA I need to see what every module and it's codes

donpb

You can remote to his laptop.