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Author Topic: Ignition: open circuit  (Read 9300 times)
Sandstorm3k
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« Reply #15 on: September 09, 2021, 03:59:54 PM »

I do not have access to Seat wiring diagrams. However looking at the diagrams for my GTi it looks like the ignition coil wiring is part of the body wiring harness and not the removable engine wiring harness. There is also a 14 pin connector by the battery on the GTi. Maybe seat uses this too?? I think a pin to pin overlay is in order.
This is some really good info - we'll get to it. Thanks.
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Sandstorm3k
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« Reply #16 on: September 09, 2021, 04:01:30 PM »

Not really.  There is power from the ecu relay.  But it’s all joined to pin one of the coils.  If there were no power from the ecu relay coil pack 1 and 3 wouldn’t be working either.  On mine it’s violet and black.  If you continuity check between 1 on each coil plug they should all be joined.  Is there a ground wire on the valve cover on yours?  Maybe that’s dirty.
There is, but that's not the issue as the entire engine loom was replaced.
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Geomeo
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« Reply #17 on: September 09, 2021, 04:59:41 PM »

Did you try another ecu? 
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justinvw2646
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« Reply #18 on: September 11, 2021, 10:17:57 AM »

Also check the grounds under the battery tray. Beetles with 1.8t used to set all kinds of weird faults from corrosion on those grounds. ECM disabled intermittently if I remember correctly. Which I know is a seemingly unrelated thing, but if the ECM was being disabled by poor grounds there it stands to reason its possible it could be causing your issue as well.
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justinvw2646
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« Reply #19 on: October 15, 2021, 02:37:57 PM »

Did this ever get fixed???
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Sandstorm3k
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« Reply #20 on: October 16, 2021, 09:30:53 AM »

Sadly, it has not. Relays were changed, wiring was checked but to no solution.

It's not my car nor have I worked on it, but it's for a good friend who lives 300km away. Car has been stranded for a good amount of time now.
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