Hello – I’m new here and have a problem with the XC 90 engine does not start- Message in AI: Start prevents- try again! Previously made: – 2. Message – Battery -Low voltage- Battery measured- 12,5V, radio and fan without function- Battery nevertheless renewed and charged- Error away, radio and fan again iO, – Antenna ring for ignition lock used procured and built-in- motor does not start- Error : Start prevents- try again remains, start relays removed and snapped- Starter rotates perfectly, – Error read out with Esitronic and deleted- Only error transponder signal/transponder does not remain detected, – second key – same diagnosis, question : – must the antenna ring at Volvo with the keys be learned? – Where are the ground points at the back and at the front? – Who has further ideas for troubleshooting? Thank you in advance!