[T3] Bad day at the (FI) office

[William J]

----- Original Message ----- 
From: "Daniel Nohejl" <d.nohejl at gmail.com>
To: <type3 at vwtype3.org>
Sent: Tuesday, March 15, 2016 6:46 PM
Subject: Re: [T3] Bad day at the (FI) office


> Thanks, Jim! I look forward to the box of brains and the edge connector.
>
> I was wondering this evening about power supply both to the brain and 
> to/from the relay under the back seat. Perhaps I should also check the 
> ground and power connections there. But would intermittent failure of 
> power or ground cause the motor to stall or to blink/hiccup like it 
> currently does?

 Yes the relay if it loses power or ground can cause the issues  you have . 
also connector T2 wire 16 and 24 shown on page 17 fuel system Bentley . That 
connector is between the relay and the ECU. The 69 wiring is not quite as 
well drawn out as later years. Yet it might be at the left side of the 
engine compartment toward the front of the engine near the vertical tin or 
so called fire wall. If you lose power to the ECU even for a second for 
whatever reason you lose the heart of the system. I'm not certain on a 69 
model but the later years had a brown wire off the power relay to the relay 
mounting screw. I'm sure you have studied the 69 wiring schematic both in 
the fuel section as well as the schematic and will see power off the starter 
as well as through a fuse. One is hot all the time and one energizes the 
relay to complete the circuit off the ignition switch through the fuse.

 AS far as the prime switch button goes , if you still have the ign warning 
buzzer I tend to use that by removing the buzzer , on a 69 use fuse 12 at 
the top of the 16 amp fuse . All that circuit feeds is the buzzer and to me 
is a great place to add a circuit to.

William
>
> I don’t know if it’s relevant, but I installed the fuel pump prime 
> switch/button on Sunday and we’re running the switch off the bottom of 
> fuse #8, the red 16 amp fuse for the wiper motor. Of course my issue 
> exists even with the wipers off, but I figured I’d put it out there in 
> case using that fuse sends up a red flag for anyone.
>
> We had little energy left for testing after work today but we found that 
> with the pedal floored, we’re maybe 10*-20* off from full throttle as seen 
> here
>
> http://www.thesamba.com/vw/forum/album_page.php?pic_id=1478218 
> <http://www.thesamba.com/vw/forum/album_page.php?pic_id=1478218>
>
> I pulled the cable further through the barrel clamp and now it’s 100% open 
> though I’m at the last bit of metal on the cable end to clamp down on 
> before the cable itself. If it matters, this is the same cable the car 
> came to us with 4 years ago and for all I know it’s original to the car. I’ve 
> yet to examine the throttle Bowden tube or anything else.
>
> I haven’t driven it yet and won’t be taking it to work tomorrow as I can’t 
> afford to be late in the event of an issue so this is where we’re at for 
> now.
>
> Daniel
>
>
>
>
>
>
>
>
>> On Mar 15, 2016, at 6:00 PM, Jim Adney <jadney at VWType3.org> wrote:
>>
>> Okay, Daniel, 2 more brains are on their way to you. One is an A
>> brain, rebuilt by Bosch into a CU10X, which I assume means it was
>> rebuilt into a B. The other one is a B. Both were tested by me, but
>> only to the same degree as the one you already got from me.
>>
>> The Post Office expects to deliver on Thursday.
>>
>> Packed in between the 2 brains is a piece out of the edge connector
>> of another B brain, in a tiny zip lock bag. Use it to like a feeler
>> gauge to check each pin in the brain connector on your harness. Pay
>> special attention to these pins:
>>
>> 16 is the 12 V power input for the logic
>>
>> 11 is the logic ground
>>
>> 24 is the 12 V input for the injectors
>>
>> 3, 4, 5, & 6 are the outputs to the injectors
>>
>> The connectors that carry the highest currents need to be the
>> tightest. Those would be 3, 4, 5, 6, & 24.
>>
>> If you find any of these to be loose, you can carefully bend the
>> connector pin with a small tool, to tighten it up slightly. Be
>> careful, don't overdo it.
>>
>> -- 
>> *******************************
>> Jim Adney, jadney at vwtype3.org
>> Madison, Wisconsin, USA
>> *******************************
>>
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