DME wiring

[healeyneil]

OK, so I am going to fit the engine/gearbox from an e36 318is into my Baur. I thought I could carefully fillet out all the wiring from the donor car and transplant that> Ive ovbviously cut a wire too many cos it wont run now. Neither the DME relay, nor the oxygen sensor relay are being switched on. Can I just power them up from the ignition switch, or is that too easy! Thanks in advance, Neil

[nas80]

What about ews?

[Jeroen]

Depends on the build year of the donor car, EWS will be an issue from late 95 on I believe. Can be solved with leaving the EWS ring antenna in tact and tape the transponder to it, or have EWS programmed out by a specialist. Make sure to use the EWS module from the donor car.

[healeyneil]

Oh lord ! I havent even heard of EMS. What is it please

[Jeroen]

Electronic Drive Away Protection which in German is Electronische Wegfahrsperre or EWS.(...) From 1995 on the following system is used, named EWS II. The mechanical key only makes a request of the vehicle starting system. Verification of the key electronically is required before the starting procedure is initiated. The system features wireless communication between a programmed EEPROM housed in the ignition key and the EWS II control module. A key which is properly coded to the EWS II control module is required before starting operation continues. The EWS II and the DME control modules are synchronized through an Individual Serial Number (ISN).

The ISN, stored in the EWS II, must match that of the DME every time the ignition is switched “ON” before engine operation is allowed. EWS II was installed on E31, E34, E36, E38 and E39 vehicles.
Major components of the EWS II system are:
• Key with Transponder
• Ring Antenna
• Transmitter/Receiver Module
• EWS II Control Module
• DME Control Module

[Jason_323i]

Are you doing it yourself. if not I would drop it over to Kyle at Chizfab as they have doen a lot of e36 engine swaps and now the electrics

Jason

[healeyneil]

Ah thanks. The donor is an early '95 car which has the dealer fitted alarm/immobiliser fitted. That came out easily !
I am doing it all myself and now have a non-running E36 in my garage, so Im still hoping for an easy answer. Glad I didnt get a later car tho

[nas80]

ok so if its an obd1 then you wont have ews. ok so what have you done in terms of wiring so far? you need to sit down and type a concise post about how and what you have done. because theres little to no info to go on.

you realise that the engine loom is all self contained and you dont need to actually cut any wires to the DME. the only wires you are supposed to be splicing are the ones that are signal / power wires that went to the fuse box in th e36

[healeyneil]

Hi Thanks nas. I havent cut any wires between the engine and the DME. Istarted by cutting out all the obvious stuff like lights, central locking etc. I was left wth all the wires running from the DME going into the fuse box and those running to the instrument cluster. Untouched are the relays for the DME, fuel pump, and oxygen sensor. Did I accidently lose the starter relay ? As it stands, the starter motor turns the engine, the fuel pump is active, and this weekend I hope to see if I am getting a spark. Ive also been told to see if there is any power at the likes of the temp sender to check that the DME is powering up. Grateful for further advice ! Neil

[nas80]

your getting a starter turning from the key?
Fuel pump primes?

if so then the ECU is happy to start the car and it should just fire up.. If you dont have the lambda connected or the MAF the car will still start but in limp mode.

Hmm, Maybe you didnt connect the big earth wire coming out from the big plastic box on the engine loom? you get two relays on the engine loom - one is for the fuel pump and one is for the DME power... the relay that triggers the starter is in the e21 fuse box.

You didnt need any part of the interior e36 loom, engine loom is only required. basically you connect that engine loom to the e21 fuse box via the plug from the loom on the original engine. the wire colours are pretty much the same,

but would be handy if you listed what wires you have joined where? got any pictures / videos of your wiring?

[healeyneil]

Over the weekend I will do my checks and report back. Fingers crossed !

[drjim]

Had something similar with my m20 motronic, apart from two sensors (forget which) having identical connectors and wire lengths, there was a wire going into the ECU that needed to be live, in the e30 it became live as it was connected to something else, but in the butchered loom I created this wire got missed out. Took a long careful check of the wiring diagram to notice and a few seconds to fix it.

Edit

It was the idle control valve and throttle position sensor that had the same connector. And it was pin 27 in the ecu that needed power. Check your wiring diagram carefully!

[healeyneil]

Well, its good news and bad news ! The good news is- I now know why it wont go. The bad news is - Its got EWS, newly rechristened effinEWS !
What I thought was the starter relay, with rather more wires than made sense, has EWS printed on it, and around the ignition Key'ole there is a little antenna.
I know that there are kits available to bypass this, but I think an earlier DME will be simplest. Heartfelt thanks to those who responded, and on the bright side, I have learned something useful today !!

[nas80]

yea thought so.


you can get an ews replicator on ebay.. only 20 quid or so. maybe an earlier ecu may work but make sre its compatible with the rest of the loom..

[healeyneil]

Thanks for that. EWS replicator brings up nothing on a search. Does it have another name ?