![]() ![]() This document explains all about the dual battery system. ![]() To clarify, the starter battery is the one under the bonnet (hood). To avoid setting fault codes and /or activating prioritization feature When reconnecting batteries you must follow an appropriate sequence.(05-15-2014, 08:51 PM)Darnott Wrote: To quote from the attached document. ![]() I can't remember which battery is first to reconnect, but just try it both ways please check all the power and grounds to the BNS.Īlso, the order in which the batteries are reconnected can set an unclearable red warning battery message. (05-15-2014, 06:33 PM)Rocinante Wrote: Those are really pretty good units. (05-15-2014, 10:25 PM)weryo Wrote: hI.Is there something additional connected to battery line.as example.lpg system.gps system.extra alarm system? I'm now pretty confident the BNS (power supply control module) in the boot (upper right wheel arch) is faulty and isnt putting the correct messages on the BUS.Īnyone got any experience of these units giving trouble - they are pretty pricey so would appreciate any input? I've also checked associated relays k57/87 and prefuse (front and rear) and of course both batteries condition. No problems caused by water ingress under either seats/carpets. I cannot interrogate the BNS unit (which of course is probably not a coincidence).Īnyway, I carried out checks tests and have confirmed that the integrity of the interior CAN networks (X30/18 etc etc) are good. Having scanned the vehicle with STAR the only related code is on the cluster (an event, NOT an error) is "fault in CAN communication with BNS". I've got an sl350 (230, 272.966) with the usual RED battery warning light illuminated on the dash with "visit workshop" displayed. ![]()
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