To add to Mark's comments on the D15 issue, see my blog post about what I found at that  connector

http://shufti.wordpress.com/2011/11/02/vanagon-d15-connector-issue/

alistair

On 2012-10-19, at 5:26 AM, mark drillock wrote:

> If you have ready access to a spare then swap the ECU but keep an open
> mind. A simple wiring fault could be involved. If you don't hear the
> fuel pump when you turn the key back on after it dies you can forget
> worrying about the hall unit of the distributor.
> 
> There is a known failure point in the 86+ dash fuse/relay panel where
> the wire connects for the ignition on signal that runs back to the
> engine compartment. Pin D15 of the panel gets cooked over time and then
> doesn't always make a reliable connection. If this is your problem no
> amount of parts swapping in the engine compartment is going to fix it.
> 
> From the ignition switch a black "ignition on" wire goes to the dash
> fuse/relay panel and then leaves again on pin D15. From there it is part
> of the main wiring bundle that heads back to the engine compartment
> wiring box. The black wire continues on to the ignition coil to power
> it, and then branches off to power up the ECU relay and enable the fuel
> pump relay.
> 
> For testing purposes you can run a wire from the alternator power stud
> to the ignition coil where the black wire attaches. There should be a
> free male spade available there next to the black wire that comes from
> the ignition switch. This will immediately power on the coil and ECU
> relay so the key switch won't be able to turn the system on or off while
> the test jumper wire is in place. I would put a fuse holder in the
> jumper wire at the alternator end. Then use the fuse to turn the power
> on and off as needed. I'd use no more than a 10 amp.
> 
> Mark
> 
> 
> 
> OlRivrRat wrote:
>>                Hey All Here's one for ya
>> 
>>        A NonMech' good friend has an '89 4spd2wd H2OBxr with 217000mis
>> ~ It
>> will start just fine & idle & run just fine for a Random period of
>> 
>> time then instantly shutdown as if the key was turned off ~ then in
>> most cases it will start right back up again. On the occasions that it
>> doesn't
>> 
>> start right back up I can tell that the FuelPump is not doing the
>> PreStartRun but then after a few tries or a short wait does come on
>> when Key is
>> 
>> turned to Start & will then FireUp&Run.