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__FORCETOC__ This page applies to Address '''46-Central Conv.''' in MLB based models such as the VW '''Touareg''' (7P/BP) and Audi '''A4''' ''(8K)'', '''A5''' ''(8T)'', '''Q5''' ''(8R)'' in addition to the '''A6/A7/A8''' ''(4G/4H)'' models with J393 Component: '''BCM2 1.1''' and '''BCM2 2.0'''. This page does NOT apply to MLBevo models using Component BCM2 MLBevo. The installed BCM2 can be identified by evaluating the data in the Auto-Scan: Address 46: Central Conv. (J393) Labels: 8K0-907-064-46.clb Part No SW: 8K0 907 064 DG HW: 8K0 907 064 DG Component: BCM2 1.1 H02 0321 Address 46: Central Conv. (J393) Labels:. 4H0-907-064-46.clb Part No SW: 4H0 907 064 BR HW: 4H0 907 064 BR Component: BCM2 2.0 H31 0330 == Information == This control module is the Immobilizer (KESSY) and it uses Address words 05- Acc/Start Auth. (J393) in addition to Address 46-Central Conv. (J393). Replacement of this control modules will result in Immobilizer problems in addition to Component Protection (CP) DTCs which cannot be resolved using VCDS. See the [[MLB based Acc/Start Auth (J393) BCM2#Replacement | Replacement]] section below. == Coding == Coding information is available while connected to the vehicle with VCDS using the '''[http://www.ross-tech.com/vcds/tour/recode_screen.html Long Coding Helper]'''. It is strongly recommended to save a complete [https://www.ross-tech.com/vcds/tour/autoscan.php Auto-Scan] prior to any coding modification. == Adaptation == Documented Adaptation channels are available in the form of a drop-down menu when connected to the vehicle with VCDS. == Security access == Security access codes will appear in the form of a pop-up balloon. * Special note: Address 46 controls the rear lighting via Adaptation channels. It is strongly recommended to create Adaptation function [[Control Module Maps]] prior to any modifications that require a Security Access code! Make sure to enter the needed security access code when creating the [https://www.ross-tech.com/vcds/tour/controller-channels-map.php baseline map] prior to changes. == Replacement == [[Immobilizer]] component matching and Component Protection can only be learned/disabled using the Factory Tool in Combination with an online Connection with GeKo access. This can be completed online at the dealer or by using a Pass-Thru (J2534) device per the notes on our [[Official Factory Repair Information]] page.

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