Couple of Digifant schematics, not complete internally, but may help.
Might try ecudoctors.com....
Jon

On 9/14/2014 4:09 AM, Roy Nicholl wrote:
> If they were adhering to IEEE 200-1975 (in effect at the time), BT would be battery and there would be no ambiguous 'B's
>
> 'B' can also be used for a 'blower' (or 'motor'), but that is also unlikely in this instance.   Is the schematic for the ECU available someplace?
>
> Given that ECUs are endangered, does the list knowledge know if anyone has attempted to transfer the functionality into software - which could be run on a rather inexpensive embedded system?   Obviously such a solution would be costly as there would be insufficient demand to scale, but it would make it possible to add an OBD interface to the Vanagon :-O.   ... of course, it would probably be more effective to simply add a Subaru flat-four with its proven computer control system.
>
>
> On 14-Sep-2014, at 05:45, Raymond Markett wrote:
>
>> Wow! It looks like reversed polarity or a short caused a high current and burned the components. R usually stands for resistor, D for diode and C for capacitor. B usually stands for battery but that doesn't make sense in this case. I would guess that B202 is a inductor or coil. L usually stands for coil on U. S. schematics, but maybe VW uses B for the B field associated with a coil.
>>
>> Sent from my iPhone
>>
>>> On Sep 13, 2014, at 9:40 PM, Neil N <musomuso@GMAIL.COM> wrote:
>>>
>>> Hi all.
>>>
>>> As promised, the gory details. Images of my partially fried ECU:
>>>
>>> https://picasaweb.google.com/musomuso/Motronic29ECUBurnedPartsEngineStillRan
>>>
>>> Can anyone take a guess at what this part is, or was?   ;)
>>>
>>> B202 shown here:  http://tinyurl.com/qxeceae
>>>
>>> My close up shots are usually better. Sorry for poor quality images. I
>>> generally don't use my good camera while in the shop.
>>>
>>> Neil.
>>>
>>> --
>>> Neil n
>>>
>>> Blog: tubaneil.blogspot.ca
>>>
>>> '88 Westy http://tinyurl.com/c8rlw6p
>>>
>>> '81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/
>>>
>>> Vanagon VAG *Gas* inline-VR Engine Swap Group:
>>>
>>> http://tinyurl.com/d7gd5ej