View single post by ident
 Posted: Sunday Apr 4th, 2010 02:27 am
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Joined: Wednesday Aug 9th, 2006
Location: Singapore
Posts: 3493

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You only need to connect the 12V and COM to the UCM doing the upgrading. The KA/KB or data does not need to be connected. However it may be convenient to leave in place the white 4 way cable between the UCM and Comfort.

However the UCM being upgraded should NOT be  connected at all except by the 6 way programming cable

Last edited on Friday Jun 14th, 2013 04:17 am by ident

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