Date:         Tue, 31 Mar 2020 16:50:30 -0700
Reply-To:     Alistair Bell <albell@SHAW.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Alistair Bell <albell@SHAW.CA>
Subject:      Re: Update Re: Engine died,
              March 31 update and maybe ecu smoking gun?
Comments: To: vw_van_fan_Mark <madvws@cox.net>
In-Reply-To:  <89ae0dbf-69a9-c113-0ac6-a00b3d573458@cox.net>
Content-Type: text/plain; charset=utf-8

Oh I’m not sure I’ve got the PIN numbers in my head right. But the tape on the ecu note the results.

Ab

> On Mar 31, 2020, at 4:17 PM, vw_van_fan_Mark <madvws@cox.net> wrote:
> 
> For fun you could use an Ohm meter to see if that transistor connects to the ECU pin that drives the ignition coil.
> Put a meter probe on each of the three legs in turn and test the ECU pin(s) with the other probe.
> 
> I would look at ECU pins 25, 12 3
> to see if any leg of that transistor connects to any of those pins.
> 
> The driver transistor for the fuel injectors is the one I'm used to seeing a bad connector at.
> 
> Mark
> 
> Alistair Bell wrote:
>> That black component that had the one leg solder joint broken is BUV37B
>> 
>> Looked up and it’s , if I read it right, a power transistor.
>> 
>> Alistair
>> 
>>>>> On Mar 31, 2020, at 2:41 PM, Alistair Bell <albell@shaw.ca> wrote:
>>> Hi,
>>> 
>>> Yesterday wasnt much success. Was planning on more but it poured ra=
>>> in most of afternoon and I really didnt want to fool around in the wEt.
>>> 
>>> Went into work at 5, got my work work going and then tried....
>>> 
>>> Timing light with trigger tie wrapped on, inductive lead around plug lead, etc. Crank and no flashing of light.
>>> 
>>> Installed spare dizzy. Now I have now idea of hall sensor in this unit ok. BUt installed made no change, cranks and no timing light flash.
>>> 
>>> I was getting pretty disheartened. Back to work and out by midnight .
>>> 
>>> Today I got the ecu into the home workshop. And looked at it more carefully.
>>> And I did find one bad solder connection. The pin does move in the joint when lightly probed.
>>> 
>>> https://shufti.files.wordpress.com/2020/03/65892428-f4f0-4c98-b531-805319377126.jpeg
>>> 
>>> It corresponds to the middle leg of this black square heat sunk component.
>>> 
>>> https://shufti.files.wordpress.com/2020/03/2171ce8f-47d2-47f0-be1c-03f92115a95e.jpeg
>>> 
>>> I will reflow the joint unless I hear back from you guys not to bother=

>>> :-)
>>> 
>>> Alistair
>>