R230 bns, It gives us (well at least me) confidence that our cars can remain in service even if the BCM fails, as these modules are becoming ever harder and more expensive to find. Mar 11, 2021 · I have also joined the BNS/BCM R230 group on Facebook (there are nearly 1000 members) and suggest everyone do the same. This is not an explanation of how the CAN and WAKE UP work, it is a guide to a simple way to know if your car is going to sleep, and how you can check with just 2 voltage checks. I am assuming my obd gizmo only looks at certain modules on the car compared to the Star DAS system. The current battery has CCA of 640A. May 15, 2014 · I've got an sl350 (R230, 272. "Left Right corner" . Apr 22, 2014 · This is a guide to the CAN bus in the 230 it applies to all models right up to 2008ish. . I keep a brand new BNS on the shelf, since trial by substitution has been the only way I have found to determine reliably if it’s faulty or not. However, the following procedure can be used for a strong consumer battery to start the engine with a weak starter battery. Reproduction, Upgraded BNS Battery / Load / Stabilization Control Unit designed for the subsequent years, make, chassis, models, and engines: 2002 - 2012 / Merc Dec 20, 2025 · Find many great new & used options and get the best deals for R230 BNS Battery supply control module 2305401045 Mercedes SL500 at the best online prices at eBay! Jun 18, 2010 · My gizmo states that the SAM's are OK but I can't get to the BNS to see if there are any errors stored in there. The idea is to file a class action suit that would force Mercedes to recognize the issue and provide a solution. Dec 25, 2024 · I'm sure the R230 community greatly appreciated what you created and are selling Brian. 966) with the usual RED battery warning light illuminated on the dash with "visit workshop" displayed. Ideally a new BNS/BCM should be made and within a recall, replaced. Oct 23, 2023 · The BCM (AKA BNS) is there for several reasons: to isolate the front battery so the car always starts, to provide auxiliary power to the rear battery if it goes low and so you have power for the brakes and other essentials. The boards are all based on the STM32F105 microcontroller. The boards are all similar in design and function. May 15, 2014 · Things are still pointing towards faulty BNS. Would this help with the powering up the BNS module? I don't see voltage change on the starter battery when the car is started. I have experimented with several types of boards, all available from AliExpress. We are only dealing with CAN Aug 7, 2024 · While the starter battery can assist a weak consumer battery, the BNS module is not programmed for the reverse scenario. Mar 8, 2021 · Hi All, I purchased a 2004 Sl500 recently with a few issues :) 1) Radio not working - fixed by replacing the fuses on the radio and amp 2) Left right corner sagging - have not start to investigated this yet 3) Battery warning light on the dash I have spent some time troubleshooting the battery Jan 15, 2014 · From the "R230 Dual battery On-board Electrical System" pdf, it does state that the battery should be 70A, but the CCA is higher at 798A. 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". Mar 31, 2022 · The BNS module in the boot have given me trouble in the past, with battery warnings in the cluster that have been difficult to pin down. Spoof a healthy BCM/BNS on the R230 CAN-B bus to extinguish the red battery warning from the instrument panel. The fact I cannot interrogate the BNS too This R230's driving me mad :S Mercedes Glasgow Independent Specialists M B Jarvie Ltd. Thanks given by: Reply Jafo666Location Offline Reputation: 1 Thanks Given: 30 Thanks Received: 10 (8 Posts) Posts: 42 Threads: 15 Joined: May 2014 8 05-16-2014, 01:51 PM.


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