Since the 'B' is ambiguous, is it possible a bridge (normally 'BR")?   Again, the schematic should answer any questions.

On 14-Sep-2014, at 07:09, 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