Zoran, the ECU only provides ground for one of the relays, that is the
fuel pump relay. If you manually provide ground to pin 85 of that relay
the fuel pump should run 100% of the time as long as the key is also on.
Does it?

It is unlikely that all 3 ECUs would be bad the same way unless
something about your van is killing them. I doubt this but testing the
ECUs in another van should answer that. It is possible that the wire pin
on the ECU connector is pushed out of position. It would be pin 3. Page
24.61 shows the Digifant 25 pin connector layout. Another possibility is
a break in the wire from ECU pin 3 and fuel pump relay pin 85.

When you manually provide the ground for the relay, exactly how are you
doing it?

Mark

Zoran Mladen wrote:

> Thanx for your input as usual Mark.
>
> The relay works fine IF we manually provide the ground and the key is
> on.  If the key is off, there is no juice so the relay will not trip
> when we add the ground.  So we know the relay works.  The juice comes
> from coil when the key is on, and there is juice at terminal 30 as well.
>
> Yes, I am 100% sure we are using the proper relay for the fuel pump
> relay.  I am 99% sure on the fuel injection relay as well, but will
> confirm that.  Everything on the relays work properly with the exception
> of getting the ground from the ECU to trip the fuel injection relay.
>
> Knowing this, what is the next step??  I will confirm the proper fuel
> injection relay is proper.  I have already done this a couple times, but
> will do it again.
>
> Thanx again for you insight...could it be bad ECUs...all of them?  One
> final piece of information.  The Van would not start.  We determined the
> fuel injection relay was not working.  We installed a new relay and it
> started right up.  We drove the Van about 5 miles perfectly, then it
> just cut off.  Now, there is no ground coming to the fuel pump relay.
> Thats where we are now...
>
> Z
>
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