Vw EOS 2007 TDI
Car had been driven with air con on and then parked. On returning short time after to car it’s fans were on continuous and therefore battery dead and car wouldn’t start. Unable to jump start car with recovery,
New battery fitted and still wouldn’t start, it would turn over but no start.
Diagnostic found various codes caused by flat battery, including 01314 code.
The relay 100 was removed and a link put between two connections and the car will start first time.
No codes are found once car runs.
All fuses have been checked.
Relay 100 is working, replacement relay fitted and still won’t start unless temp linked on connections.
Is there another relay fuse location that may cause this issue.
Don’t want to strip and replace ECU if something simple.