Unplanned maintenance

[crystalworks]

You're in Austin, what full scan are you looking for? I could probably steal some time away and head up there with the laptop.

[X5chemist]

After spending time going through all the rear and 60 fuses in the glove box, I threw up the towel. It has not hit the floor yet. I'm chasing the no sleep issue. So far, I have not found an amp draw for a clue. I want to fix the problem before it becomes an issue to hurt electrical systems or near 1 year old battery. This shop: https://www.hceuro.com/ , will charge $85 for a full scan. About three hours for them to set up all the monitoring equipment and let it fall asleep on its own. Well, only as far as it will go. Worth every penny if I can get clues to the no sleep issue. Plus now, the no interior light issue.

If you can spare time, I'll meet you half way or drive it to San Antonio. BBQ and BEvERageS are always a treat. I'm making a wish list too. Like coding the temp gauge to read lower. Turn on the auxiliary fan accordingly. Plus code stuff others have done here. The no sleep is really the only problem keeping me from making it a long trip driver. It needs mechanical attention. I have nice pile of parts now. Until I fix the no sleep issue, I'm holding off on the parts.

[Overboost]

No sleep at all or does it go to sleep and wake up? I went back through your thread and didn't see any steps to look at the obvious. Mine was a bad TCU in the rear and unplugging fuse 72 in the rear is a quick and easy diagnostic to rule that out. That is one of the most popular draws that will kill a normal battery in 2 days.

[crystalworks]

Originally Posted by X5chemist

If you can spare time, I'll meet you half way or drive it to San Antonio. BBQ and BEvERageS are always a treat. I'm making a wish list too. Like coding the temp gauge to read lower. Turn on the auxiliary fan accordingly. Plus code stuff others have done here. The no sleep is really the only problem keeping me from making it a long trip driver. It needs mechanical attention. I have nice pile of parts now. Until I fix the no sleep issue, I'm holding off on the parts.

Not a bad cost on that scan/diag.

I'll see when I can slide away on a weekend. I have a buddy in Austin I need to meet up with that the wife has been expecting. Jan. is pretty full as we had/have 4 birthdays, 4 dr. appts, and the kiddos are getting their second jabs. Fun month. I'll shoot you a PM if I can get a kitchen pass.

Never done any hex coding (think that's necessary for the temp gauge), so make sure you have your notes on that if you want to give it a go. I have the full BMW suite running (minus ISTA-P) so troubleshooting/scanning should be no issue.

[andrewwynn]

Most people will find the draw within a few days of trying.

Pulling Banks of fuses is a quick way to find which group is the culprit.

[X5chemist]

Fuse #72? It’s not on my troubleshooting list. I did try 75. 74 is pulled. The motion sensor is unplugged. The FSR was replaced. Will 72 affect radio operation? If not, I’ll pull it tomorrow. While testing before 16 min expired, it did have a voltage drop there. After 16 min, it went to 0 drop. However, my two current voltmeters don’t have accurate range to low milliamperes. The list above is where I found voltage on fuses after 16 min.
The Foxwell does command sleep. After 1 second, it wakes up. The P light is not working now. It did before when it’s awake. I know it’s a wake by the green left window switch button. When sleep command is activated, the switch light turns off. After a second, it turns back on.

[Overboost]

Originally Posted by X5chemist

Fuse #72? It’s not on my troubleshooting list. I did try 75. 74 is pulled. The motion sensor is unplugged. The FSR was replaced. Will 72 affect radio operation? If not, I’ll pull it tomorrow. While testing before 16 min expired, it did have a voltage drop there. After 16 min, it went to 0 drop. However, my two current voltmeters don’t have accurate range to low milliamperes. The list above is where I found voltage on fuses after 16 min.
The Foxwell does command sleep. After 1 second, it wakes up. The P light is not working now. It did before when it’s awake. I know it’s a wake by the green left window switch button. When sleep command is activated, the switch light turns off. After a second, it turns back on.

Sorry, typo. Fuse 74 is the fuse for the TCU. Look at your aux fan next
.

[andrewwynn]

So you need to unplug a fuse or four at a time and commamd sleep until you find a batch or a fuse where it stays sleeping.


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[andrewwynn]

[mention]Overboost [/mention] has the step by step to make the temp dial functional.

[X5chemist]

The auxiliary fan has been replaced. It stopped working shortly after I bought it. A new brushless fan works great. Spins crazy fast. Takes about 10-15 seconds for it to wind down. Hopefully the scan will give good info. Maybe even something to code out. I’ll post back here with a report.