EWS Issues - Immobiliser Interface Code 66 on M3 Touring Conversion

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  1. EWS Issues - Immobiliser Interface Code 66 on M3 Touring Conversion 
    #1
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    southways's Car Details
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    Hi everyone,

    I'm currently in the process of building this car:

    PERFORMANCE CAR PROJECT BLOG - BMW E46 M3 CS Touring SMG | Facebook

    I can't help but feel cheeky coming on to an owner's forum looking for help when I'm working on the car in a professional capacity, but I'm stuck in a rut!

    Basically, I'm converting a 2000 320i Auto (LHD) into an M3 Touring using a 2005 M3 CS SMG (RHD) as a donor car (the donor was a catD repair job....mechanically good, but average body repair underneath!)
    I've got all the engine, gearbox, suspension, brakes....even the boot floor switched over, and so far everything is looking good. I seem to have the gearbox selecting as it's supposed to and all the engine systems seem to be live.
    I've got a problem though.....it won't turn over on the key!

    Points worth noting:

    * I've done an M3 conversion into an E46 Touring before, though it was a manual car. I did have an issue of non-cranking where I fitted the DME and key from the donor car, but not the EWS module as I wasn't aware of it. Once I'd changed that, it fired up.
    * On this car I'd fitted the M3 DME, but left the original key and EWS as I (wrongly) read that the key and the EWS are the immobiliser system....the DME wasn't part of it.
    * On learning the DME does need to match the EWS module, I switched that over from the M3 too. So now I have the key, the EWS and the DME all from the same car.
    * I've spoken to a local well-regarded BMW specialist (we aren't BMW specialists, we've only ever done these conversions!) who's informed me that having mismatched the EWS & DME already is no issue. I'd rang them after reading on a forum in the USA that I might need to get it all re-coded together. He assured me that was bollocks, and that as long as all the right components are in place, it should work. Unless there's a wiring fault......

    .....So today I've been spending time investigating by looking at the wiring diagrams again, and I've noticed something I can't explain. On the EWS pinouts, according to the WDS diagrams, pin2 is supposed to be the trigger to the starter solenoid (as the EWS effectively acts as a starter relay). It's a black/blue wire. Again, according to the WDS circuit diagrams, this is the same for the M3. However, the M3 has an additional wire to pin 3 (also black/blue), which is not shown on the 320i diagrams. According to the list, this goes to fuse 22 (5A) in the fuse box, which I've fitted (I can't remember what goes on the other end, but that's in there too). All the wiring in the fuse box has been fitted as it would be in the M3.

    Still with me?! So all I would (in theory) need to do here is hook up the wire to pin3 on the EWS plug, and there you go. According to the wiring diagrams, that's it.

    Only it's not; the 320i never had a wire going to pin2......it had this single black/blue wire heading straight to pin3, a pin which according to the WDS is not used.
    I've no reason to suspect it's ever been tampered with, and the Touring ran fine before it was stripped down. My issue could well lie elsewhere, but until I can work out what's going on with these two wires I could be chasing my tail.

    Any advice/knowledge/assistance would be greatly received. BMW dealers (unsurprisingly) don't want to know!

    Cheers,

    Rich
     
     

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    #2
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    southways's Car Details
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    Right, made a little bit of progress...I've probed deeper into the WDS system and found the correct wiring diagram for the Touring (I'll upload them tonight). It turns out the Touring was wired correctly (as I'd assumed it would be) and in a bizarre twist, it looks like it's wired differently to the M3 physically, yet the EWS boxes have the same part number and the same PCB. This is really strange, given that the difference in the wiring between the two cars is the fact that pin3 on the Touring's original wiring is an input, yet on the M3 it's an output!

    So my question now is, are the EWS units re-programmable in the respect that you can change the properties of the board?

    Thanks
     
     

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    #3
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    It would probably be able to be done with coding. Maybe that extra wire is linked to the SMG somehow, I know the E36's wouldn't start unless the bonnet was shut.

    Does it turn over with the new EWS and key?
    If it has lost sync with the ECU, it should still turn over provided the key and EWS box match.
     
     

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    Quote Originally Posted by TheEnd View Post
    It would probably be able to be done with coding. Maybe that extra wire is linked to the SMG somehow, I know the E36's wouldn't start unless the bonnet was shut.

    Does it turn over with the new EWS and key?
    If it has lost sync with the ECU, it should still turn over provided the key and EWS box match.
    Hi, the extra wire is linked to the SMG through fuse 22 (5a) in the fusebox. When I turn the key to crank, there is a quiet thud in the gearbox area (I'm guessing it's unlocking something?) If I pull the fuse, this clunk disappears, so I can only assume what ever it's supposed to be doing is right.

    It doesn't turn over at all. The key, EWS and DME are all from the same car (which I drove prior to stripping it down).

    Cheers
     
     

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    OK, maybe it is an SMG problem, pins 3 and 6 from the EWS should connect to the SMG controller.
    There should be some sort of pre-charge from the SMG pump, usually on unlocking the car.

    This hydraulic pressure is likely to be needed to "put the clutch" in for starting.
     
     

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    Quote Originally Posted by TheEnd View Post
    OK, maybe it is an SMG problem, pins 3 and 6 from the EWS should connect to the SMG controller.
    There should be some sort of pre-charge from the SMG pump, usually on unlocking the car.

    This hydraulic pressure is likely to be needed to "put the clutch" in for starting.

    That's the problem, pin 3 feeds a fuse that controls something SMG related, but on the original touring setup pin 3 was the input from the ignition switch , not an output. On the M3 setup the input from the ignition goes to pin 2, which was unused on the touring setup. Pin 6 goes to the SMG ECU, but that's no different to the wire that used to go to the auto-ECU on the original touring setup.

    I've wired it exactly as the M3 was, using all the M3 bits, but I still have this issue and I'm wondering if the EWS itself has been programmed to look to number 2 for the input, and even though I've wired it as it should want, so perhaps there is some other conflict somewhere.

    Cheers
     
     

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    #7
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    M3 EWS3
    Pin Type Description / Signal type Connection /
    Measuring notes
    1 A Signal, starter terminal 50 Starter
    2 E Signal, terminal 50, ignition lock Ignition switch
    3 A Start signal terminal 50 Fuse F22
    4 A EWS enable for engine electronics Digital motor electronics control unit
    5 A Signal EWS toroidal coil EWS toroidal coil
    6 A Signal Transmission switch Automatic transmission SMG control unit
    7 Not used
    8 E Signal, start lock switch USA/Japan Manual transmission Clutch switch module
    9 M Ground Ground point
    10 E Terminal 30 Fuse F67
    11 E Terminal R Fuse F14
    12 A Signal EWS toroidal coil EWS toroidal coil
    13 E/A K-bus signal K-bus connector


    Other Petrol engines
    Pin Type Description / Signal type Connection /
    Measuring notes
    1 A Signal, starter terminal 50 Starter
    2 E Signal, terminal 50, ignition lock Ignition switch
    3 A Start signal terminal 50 sequential manual transmission SSG Fuse F22
    4 A EWS enable for engine electronics Digital motor electronics control unit
    5 A Signal EWS toroidal coil EWS toroidal coil
    6 A Signal Transmission switch Automatic transmission Transmission control
    7 Not used
    8 E Signal, start lock switch USA/Japan Manual transmission Clutch switch module
    9 M Ground Ground point
    10 E Terminal 30 Fuse F67
    11 E Terminal R Fuse F14
    12 A Signal EWS toroidal coil EWS toroidal coil
    13 E/A K-bus signal K-bus connector



    According to that, they should be virtually identical, all the different variants, Diesels, 4cyl auto and manual all have pin 2 as the starter input.
     
     

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    #8
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    Quote Originally Posted by TheEnd View Post
    M3 EWS3
    Pin Type Description / Signal type Connection /
    Measuring notes
    1 A Signal, starter terminal 50 Starter
    2 E Signal, terminal 50, ignition lock Ignition switch
    3 A Start signal terminal 50 Fuse F22
    4 A EWS enable for engine electronics Digital motor electronics control unit
    5 A Signal EWS toroidal coil EWS toroidal coil
    6 A Signal Transmission switch Automatic transmission SMG control unit
    7 Not used
    8 E Signal, start lock switch USA/Japan Manual transmission Clutch switch module
    9 M Ground Ground point
    10 E Terminal 30 Fuse F67
    11 E Terminal R Fuse F14
    12 A Signal EWS toroidal coil EWS toroidal coil
    13 E/A K-bus signal K-bus connector


    Other Petrol engines
    Pin Type Description / Signal type Connection /
    Measuring notes
    1 A Signal, starter terminal 50 Starter
    2 E Signal, terminal 50, ignition lock Ignition switch
    3 A Start signal terminal 50 sequential manual transmission SSG Fuse F22
    4 A EWS enable for engine electronics Digital motor electronics control unit
    5 A Signal EWS toroidal coil EWS toroidal coil
    6 A Signal Transmission switch Automatic transmission Transmission control
    7 Not used
    8 E Signal, start lock switch USA/Japan Manual transmission Clutch switch module
    9 M Ground Ground point
    10 E Terminal 30 Fuse F67
    11 E Terminal R Fuse F14
    12 A Signal EWS toroidal coil EWS toroidal coil
    13 E/A K-bus signal K-bus connector



    According to that, they should be virtually identical, all the different variants, Diesels, 4cyl auto and manual all have pin 2 as the starter input.
    Hi, they're not the same. That's an SMG and an SSG pinout list - they're the only two which are similar.

    Here are the relevant wiring diagrams I downloaded from the WDS system.




    The main thing to note is that on the Touring, pin 3 is an input from S2 (ignition switch). On the M3, this is pin 2 instead, which is unused on the Touring. However, on the M3, pin 3 is an output (to fuse 22....SMG related), yet the two EWS boxes are the same part number.

    It crossed my mind that maybe they're programmed differently, but then I realised this was irrelevant; the Touring is now wired the same as the M3, yet it still says there's an interface issue.

    As you can see, both EWS units are the same part no:



    They have different labels, but I'm assuming this is because the M3 one (2005) has a sticker over the Rover part number, to remove it as it was post-Rover sale! The Touring one is a 2000 year.

    We're still really scratching our heads here. I've since bridged the input from the ignition switch with the output to the starter (bypassing the EWS module) and the engine cranks over fine.
     
     

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