E30 from Ukraine - "Shadow of Intelligence"

[The_Glory]

It's awesome that you got to drive it on a quick tour of town.

It's an impressive project, beautifully documented.

Yes, I was happy like a child! )))
Thank you very much!

[The_Glory]

Searching for an electric current leak

Since I only went out on weekends, the car was in the garage for a week. Previously, I removed the "ground" terminal from the battery, because I could do something with the wiring. Now I've almost finished everything, so I didn't disconnect the terminal. And after three days, the 72Ah battery was discharged. Completely! to 4.8V! Something specifically was "eating" it!
So, I need to find out what exactly. I suspected the standard immobilizer that I installed. After all, it turns on automatically and works constantly. I even started thinking about installing a "ground" switch...
But, I'm starting the search.
We disconnect the "ground" terminal. We connect the multimeter in current measurement mode (up to 10A) in series - one contact to the "-" terminal on the battery, and the other contact to the disconnected terminal on the body.




We turn off all electrical consumers, close all doors and the trunk so that the interior and trunk lights go out. On newer cars, you need to wait 15-20 minutes until the car "falls asleep" and all electrical units turn off. There are no such units on the E30, so you can immediately look at the indicators.
At first, the multimeter showed 0.41A! This is A LOT! It is not surprising that the battery was completely discharged in three days. A normal current leak is considered to be 0.04A-0.06A.
I start removing all the fuses (then the relays) one by one, following the multimeter readings. If the battery is in the trunk, and the fuses are under the hood, then it is more convenient to do this with an assistant so as not to run back and forth every time. )
And then, having reached fuse No. 21, the readings on the multimeter dropped significantly - to 0.02A. That is, something that is in the circuit of this fuse and "eats up" the battery.


According to the fuse list No. 21, these are:

21 7.5A Interior lighting lamps. Glove box lighting lamp. Portable lamp. Clock. Radio receiver (station memory device). On-board computer.

The prospect of once again getting into the interior wiring of the on-board computer or audio wiring scared the crap out of me! ))) So I decided to start simple - it's logical! ) I turned off the interior lights - nothing changed. I opened the glove compartment - the same thing. But when I pressed the button with my hand, the multimeter showed pleasant readings - 0.02A! Great!


That is, the box did not fully press the button, and the lamp was constantly on. Just in case, I made sure of this by putting the phone in the box in video recording mode and closing and opening it. The lamp is constantly on in the video.
I slightly bent the button bracket and everything started working as it should. I checked it again with the phone. )
I'm very glad that everything turned out to be so simple! ) Three days have passed - the battery is normal. Finally, I fully secured its terminals and installed all the clips holding the plastic boxes over the battery.

[The_Glory]

Repair of BMW BAVARIA C BUSINESS radio buttons

I have previously written about my collection of stock radios in the relevant ETK section.


After that, I also got a CD player, I also wrote about it.


But I only need to install one of them! Therefore, I connected them one by one to check their functionality.

I started with the top-end BLAUPUNKT MUNCHEN SCD09 - an analogue of the stock BAVARIA ELECTRONIC CDII.

I haven't found the CD cartridge yet, so I only checked the radio. Everything works, but the volume is very low. Later I found the probable cause. I made an adapter for the stock wiring and incorrectly connected the TEL MUTE contact, which mutes the volume when a call comes in to the stock phone. Maybe that's why the volume was muted. I've already redone the adapter, I'll have to connect it again and check. But I won't install it for now.

BMW BAVARIA C BUSINESS RDS

I bought a new screen a long time ago, it needs to be replaced. The radio works fine, but there are a few problems with the cassette - low volume and interference from the radio, fast rewinding of the cassette does not work. That's why I put it off for repair.

BMW BAVARIA C BUSINESS

All functions work fine. But I stupidly broke two buttons during installation. I'll write about this in more detail later.

BMW BAVARIA C ELECTRONIC

Everything is really bad here - the radio does not respond at all, even to the code entry buttons... For repair.

BMW REVERS
I never planned to install it in the car, although it somehow works. It's the simplest radio, its visual condition is not very good, and the connector there is in terrible condition. So it will just lie in the garage.

BMW BAVARIA DIGITAL II

A simple radio. The volume control doesn't work well. Maybe it'll also need to be repaired.

So, there are a lot of radios, but little use! )) Only one is fully in working order - the BMW BAVARIA C BUSINESS. Accordingly, I'm installing it.
But there is one nuance here. The radio is installed without a "shaft", - it is simply fixed in the dashboard with two spacer screws. I have a little more wiring in my car than normal people, so in places it creates problems. ) And here too - the radio did not fully fit into the dashboard, because the wiring harnesses in it interfered. Well, when I "stuffed" the radio, I accidentally pressed the two leftmost buttons, and the contacts fell out of them! It's good that I noticed it and didn't lose them.


To say that I was upset is like saying nothing at all... (( But, fortunately, a familiar technician calmed me down a little - the contacts did not break, but simply fell out. To put them back in place, you need to unscrew and disassemble the front panel with buttons. I removed the top cover, and from what I saw for some reason I concluded (wrong, as it turned out later) that in order to remove the front panel, you need to disassemble the entire radio - remove the boards and the cassette mechanism. I am not much of a radio technician, so I decided that it would be better to contact a local technician. For two weeks he could not do anything, then he said that everything was complicated there, you need to unsolder the boards, etc. I realized that he was the same technician as me, and took the radio from him in the same condition as it was. I decided to disassemble on your own!
We unclip the plastic cover. After looking closely, I unscrewed one screw, and the front panel with the buttons was removed! Here is this ONE screw, near the volume control, - and that's it.


And here is the reason - the contacts fell out because there was not one screw on the board that they were pressed against.


Just in case, I removed these two buttons - it is clear that there are no contacts on the extreme ones.


I tried to push them between the board and the buttons - they fell out again fell out. Therefore, you need to completely unscrew the button block from the board. Here are these screws.


And here again trouble - I don't have such a small "jeweler's" screwdriver. I had to turn to another local phone repairman again. The master could not disassemble the board, because he could not find this screw, which is located between the two boards.


Although, in the upper board there is a special hole for it, through which you can easily unscrew that screw. Such masters... But the master did not give up, even when almost all the contacts from the buttons fell out, until from her took it apart... He shoved them out, as best he could by feel, between the board and the buttons, and with a sense of victory, returned my panel to me. For a symbolic 100 hryvnias! ) Just in case, I bought a set of "jeweler's" screwdrivers there, - and for good reason! )
At home I put the panel on, connect the radio, - now ALL the buttons work hard and poorly... And the two extreme right ones now don't work at all, - now there are no two contacts there! Yours!!!... I would have been better off just buying screwdrivers from that "master" and doing it myself!
I remove the radio, disassemble the panel.


The contacts are crooked, there are no contacts at all on one button, and there were two on the other! )
I laid out all the contacts in their places, covered them with a board and screwed them in with screws. That's it.


I assembled the radio, connected it - all the buttons work perfectly.
What was the difficulty for the "masters" - I don't understand. Apparently not all masters are equally useful! )) Or, as they say, if you want something done well, do it yourself!
Finally, I installed and properly secured the radio.


P.S.
Recently, I accidentally bought an air conditioner button with whole icons. At the same time, I wanted to replace it, because the icons on mine were erased.
But here too, there is a problem! ) I didn't immediately notice that the buttons themselves are not square, but rectangular, so they stand with gaps. Someone shoved buttons from E32/E34 into the E30 body.


In addition, they are not fixed when pressed. Probably because of the contact that got into the middle of the button.


It will be a spare if it can be repaired. In the meantime, there will be buttons without icons.


By the way, the temperature on the on-board computer is real! ) And I haven't even turned on the air conditioner yet...
But, literally half an hour later, the weather changed dramatically - it started to rain, or almost a hurricane of some kind!


I noticed an interesting trend. In order for it to start raining, I don't even need to wash my E30! )) It's enough to just drive it out of the garage! )) It's happened several times already! )