DIY Repair Guide: BMW e61 Non-Operating Central Locks - Analyzing TDA 5210 System

Hello. I recently bought a BMW e61 with the problem of non-operating central locks.
There are many people who offer repair for little money, so the matter can not be difficult.
I solved the problem myself and now I am waiting for the missing part. So get to work.
The module responsible for the reception of signals is placed under the spoiler in the place where the STOP light is.
How to dismantle this contraption everyone will find on the net without a problem.
I will describe what this amplifier is built in and I do not know why it is so expensive.
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I analyzed the structure of this module, the radio circuit is a TDA 5210 system. After the analysis it follows that it works in the 870MHz band and FSK modulation



It turns out that the system does not get the voltage to start the receiver on pin 27.
The NEC microcontroller with the symbol 12233766A is responsible for this
It turns out that this is ?PD789860, I have to grieve is the programmed ROM mask so there is no way to read.
https://4donline.ihs.com/images/VipMasterIC/I...0-1.pdf?hkey=EF798316E3902B6ED9A73243A3159BB0

Instead of giving me the voltage, I give my impulses. When I gave the voltage to pin 27 TDA5210 the generator started to work
On pin 25 there is a signal output from the radio system, on the oscilloscope can be seen when we press the buttons on the remote control from the vehicle.
First, before you start fumbling in the module, check the beam of the flap that is rubbing. In the picture, a description of the tensions that should be with a good beam.





The processor also sends a signal to the lock. The processor is damaged, thankfully you can buy it. I am currently waiting for delivery and I will write how the repair went.

The blame for this state of affairs is the unlucky placement of the module, which is exposed to moisture. In the e39 model the module was present in the post.

Hello,
have you managed to fix it?

I am waiting for the processor still has not arrived.

Has the item arrived yet?

It's a pity that he did not reply: / because I have the same problem as one of many

Has the matter moved? In my case, the problem concerns the radio weakly draws waves, the beam ok, on another module everything is ok. Does anyone know which element is responsible for it ??

Gentlemen, this element under the badge. With him, the moisture was destroyed, after the exchange of the same from another module, the car came alive.

Trotyl and what were your symptoms ??

There was no central locking with remote controls and a keyless opening and start system.

Ok, because I have a poor radio range, the rest works ok and I do not know which element to replace

Hi, where can you buy this NEC microcontroller and do you have to program it? - I have the same central problem

I have a question for the author of the post, did it solve the problem?
On the table I have just such a module and the case looks like that the microcontroller sends pulses lasting 15ms with interruptions lasting 100ms. These pulses are on pin 27 (power down) of the TDA5210 radio receiver system. It looks like the radio system was started at short intervals in to minimize power consumption, although in the active state this current is still small (7mA). I only add that the FM / AM radio amplifier takes 100mA. The car owner provided me only the module without the key so I can not check much, it seems strange to connect the pin 27 tda5210 to mcu, if it was to be in high condition all the time. In the module that fix the corroded only power cord tracks (12v), I sold them and gave the module to the owner. However, he came back to me and from what the module says the module still does not work. On pin 2 of the power socket I have 0V and the author of the post is 4.7V. Is it a data output (after processing) of the pro cesora?

TOMEK1878 wrote:

I have a question for the author of the post, did it solve the problem?
On the table I have just such a module and the case looks like that the microcontroller sends pulses lasting 15ms with interruptions lasting 100ms. These pulses are on pin 27 (power down) of the TDA5210 radio receiver system. It looks like the radio system was started at short intervals in to minimize power consumption, although in the active state this current is still small (7mA). I only add that the FM / AM radio amplifier takes 100mA. The car owner provided me only the module without the key so I can not check much, it seems strange to connect the pin 27 tda5210 to mcu, if it was to be in high condition all the time. In the module that fix the corroded only power cord tracks (12v), I sold them and gave the module to the owner. However, he came back to me and from what the module says the module still does not work. On pin 2 of the power socket I have 0V and the author of the post is 4.7V. Is it a data output (after processing) of the pro cesora?

I'm afraid that without a car it's a stupid job. The only confirmation of the efficiency of the car and the key // in addition pairedvhh that is // is what the client will tell you .... I would overtake this topic at such a stage until there will be a part for the replacement and the car. In addition, during the diagnosis ISTA + does not show any errors if this part is completely dead. Only in the tests of any of the components we see a negative result. Nothing more. Secret knowledge Gentlemen. The constructor hid many puzzles in this model, the e60 repair is done efficiently when the diagnostician has not only an icoma but a bit of time has already devoted to ransomless upholstery ... fact fact most often the problem is as trivial as reading the manual. Coming back to the topic, the PCB visible with the naked eye is divided into several parts, AM / FM and m in analogue digital decoder at 886mhz something to talk to casa, how it goes what cas considers as the key code - it drives the rest. Gentlemen, respect your time, approach the first shot to repair this antenna without a car and the key - ok, you did power, something started to happen, for me 70% antenna ok. Customer beet 100%

https://www.infineon.com/dgdl/Infineon-TDA521...N.pdf?fileId=5546d4625debb399015e286e612c3cb7
For me it did not work at all.
The reason was the digested path under the antenna socket (black).
It now works, but the range is 1m. I had similar situations in cars, but usually it was a problem of missing connections on pcb.
On the 27 TDA5210 foot, after pressing any button on the remote control, 5V appears.

After replacing the processor everything works as it should. The processors are available in China and Russia. Unfortunately, many packages from China do not reach Poland and in Russia do not accept Polish payment cards.

In what I now do, the signal from the remote control is received from a distance of max. 2m. After removing the antenna from the black socket, the range drops to 30 cm.
I wonder what happened. The signal from the remote control is received, but the receiver's sensitivity is hopeless. As for me, it's a first step on the input, and it looks like two transistors, but maybe I'm wrong. Maybe someone was more doctorate ?.

Check the antenna itself, in e61 this strip of conductive film is an antenna, maybe one pin has been broken, and now the antenna is not working. Before the TDA 5210 system there is an input circuit, usually the moisture from the SMD elements are falling, mainly capacitors. Unfortunately, I do not know their value.

I checked the antenna and for sure in the place where it bends under the protective tape I sold it, because the copper was slightly grounded, but nothing brought it.
A strange symptom was that, for example, the opening button operated from a few meters (now not anymore), and closing only from close. The battery in the remote has 3V, with a little less load.

I'm afraid that the NEC processor is ending, in my case it started the same way poorly then it did not work at all

if anything, I would be happy to repair your Diversity today I've resurrected four pieces of which only one was damp.

I've already done it.
The pilot was still up for work.

JElo_masta wrote:

if anything, I would be happy to repair your Diversity today I've resurrected four pieces of which only one was damp.

I'm happy to use your service, just tell me how do you see it, send a mail to come? Price, how it looks and where are you from?

goral919 wrote:

JElo_masta wrote:

if anything, I would be happy to repair your Diversity today I've resurrected four pieces of which only one was damp.

I'm happy to use your service, just tell me how do you see it, send a mail to come? Price, how it looks and where are you from?

Hey. If you are from Masuria, we can make an appointment in person. Otherwise, I refer to the link to pw. We will settle this shipment. Please only describe the problem.

Hello, I wanted to highly recommend really from user jelo masta I'm from Toruń, I sent you this modol and everything is elegant

Hi. If you are from Mazury, we can arrange it in person. Otherwise, I refer to the link to the pw. We'll arrange it. Please just describe the problem. [/ Quote]

Hello, I am from Ełk and I have a question if you also repair such modules or you can check whether it works, I also work with the metro lock e60 sedan module number 921-851-613. Thanks in advance and best regards

marcine60 525d wrote:

Hi. If you are from Mazury, we can arrange it in person. Otherwise, I refer to the link to the pw. We'll arrange it. Please just describe the problem.

Hello, I am from Ełk and I have a question if you also repair such modules or you can check whether it works, I also work with the metro lock e60 sedan module number 921-851-613. Thanks in advance and best regards [/ quote]


The principle of operation is the same as in e61. We can arrange, although I have a lot of work to do, too far.

Hello, everything works already module made by JElo_masta so that I recommend

Contact me, I have diversity that loses fm

Hi,

Where could i buy this NEC controller? My keys are not working.

I think it is called NECCS04000. Google doesn't not find anything about it.

bupthebroker wrote:

Hi,

Where can I buy this NEC controller? My keys do not work.

I think it's called NECCS04000. Google doesn't find anything about it.

Unfortunately, this is not NECCS04000. If you are interested in buying a smooth one, I invite you to priv.
greetings