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'02 S40 S40-V40 2002

tcm= transmission control module
there should be no more than 0.1 - 0.2 amp drain with vehicle locked and left for about 10 minutes (it can take this long for electronic systems on car to shut down after car is locked.)
if there is problem with auto trans then there should be some driving symptom or the warning light should stay on the dash. however your battery should not be going flat overnight...but from your description this sounds like a problem best left to your dealer.

steve,






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