shappy Posted October 22, 2015 Report Share Posted October 22, 2015 1999 Volvo V70 was having ABS activation on dry paved roads. No dash lights. Discovered rusty tone ring. After replacing the ring on LF axle the brakes are working fine but the ABS and check engine lights appeared. Cleared ABS code 0011 using Autel MD802. I now can’t start the car – runs momentarily then dies – and I now have code ECM 720A Immobilizer Faulty Communication. Tried to clear that but it just keeps coming back. Removed and cleaned contact to immobilizer ring. No change. What would cause resetting of codes to activate immobilizer? What do I need to do to get this sucker to run again! HEEELLP! P.S. I would dearly love it if someone can tell me how to permanently bypass/eliminate the immobilizer function. Surely my German Shepherd in the back is sufficient to deter someone interested in stealing a bright red 16 year old wagon.Bob Link to comment Share on other sites More sharing options...
BlackT5 Posted October 22, 2015 Report Share Posted October 22, 2015 You checked the connection at the antenna ring but have you looked at the connection at the Immo itself? Link to comment Share on other sites More sharing options...
Ihatespeedbumps Posted October 25, 2015 Report Share Posted October 25, 2015 Have you tried swapping antenna rings? Link to comment Share on other sites More sharing options...
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