obd2 m52 swap problems.

[matt]

Thats not what I mean.

You can make the EWS "work" without making it "alignable."

[etxxz]

i don't know things like that. my understanding is that the key has a chip that is powered up by induction from the ring/antenna transfers the whatever message (analog?) to a transponder module that relays the signal to the ewsII module which converts it to some digital signal for the dme to disable the anti-theft circuit. from this circuit comes fuel spark start and there is a changing code function always happening between the ews module and the key. are you doing obdII already matt?

[matt]

Yes, I am doing OBD2.

There is a lot more to it than that.

[BlUe E30]

he did hit it pretty much on the dot it sends an am frequency to the transponfer that powers up the capacitor in the key and sends a message to the ews module saying that there is a key then it sends another signal to the key to make sure its the right key and then goes back through the ews which then allows it to crank, then the ews sends a message through the ISN to the dme where it will check the alignment and when that matches between the dme and ews module it alows fuel and spark. if they arnt aligned properly it will try it again upto 200 times to try and get the code right. also if you say had a barred key (one that doesnt work for that car anymore) if you were to start the car within 10 seconds of turning the car off with a good key it will still start because it doesnt run through that long process again. something cool to try if you have say an e36

[matt]

Ugh, this is making my head hurt.

ISN is an individual serial number. The one in the DME can't be changed, so when you align your EWS, you are telling the EWS module to send a different ISN to the DME to allow it to start. If you don't have ALL the right wires connected at the EWS module, you will not be able to program the new ISN into the new EWS module EVEN THOUGH everything is connected to allow it to start.

[87e30]

Okay, I'm getting really confused. etxxz is the one who helped me out with what I have set up.

So, I haven't opened up the ECU yet, but I will be soon. (need the right star sockets)

Now, lets assume that my current ECU is fried. I have another ECU sitting in my garage right now. I want to make that ECU work with my current setup. If I take them the EWS unit and the spare ECU that I have and they align it (Indy BMW shop) will the new ECU not work because the EWS system is not fully wired?


I would prefer to just go pay this shop (which quoted me 150) to align my ECU and then plug it in and go from there. I suppose the only alternative would be to find a complete obd2 e36 parts car and purchase the key, ignition, EWS ring, EWS module, and ECU. That seems like quite a pain.

[matt]

Ya, you are pretty confused. You can't just take a shop an ECU and EWS and tell them to align them. How will they even talk to them? You need to take the whole car, and you need to have the ECU and the EWS wired properly as well.

[87e30]

Ya, you are pretty confused. You can't just take a shop an ECU and EWS and tell them to align them. How will they even talk to them? You need to take the whole car, and you need to have the ECU and the EWS wired properly as well.

I didn't realize they needed the entire car. I wasn't aware of this. I should talk it over with the shop.

The EWS is wired properly enough to start the car. But I'm not sure if it's wired properly enough to go throw the alignment process. I wonder if Louis knows or not. Looks like I might be better off tracking down an entire parts car. :(

[matt]

You would rather track down a parts car than read a wiring diagram?

[87e30]

You would rather track down a parts car than read a wiring diagram?

Well there are like 10+ pins on the EWS module and I only have about 4 wired up and the rest of the wires are cut.

Even if I wire it all together I'd still have to pay to align the EWS. May as well try to find a parts car and pull a good deal on a bunch of useless (for most) obd2 parts.

[Farbin Kaiber]

lulz.

[87e30]

lulz.

Why lulz?

[Farbin Kaiber]

this whole EWS fiasco. I think you are way off the mark. Find a parts car?

[87e30]

this whole EWS fiasco. I think you are way off the mark. Find a parts car?

I haven't seen anything on criagslist. If I open up the ECU and it's shot then I'll search harder.

Well, I'm not claiming to know much. What would you suggest doing?

[Farbin Kaiber]

Listen with both ears to the guy who does DME chips and OBD2 stuff.