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Lose of communication and ECM TCM on 2009 Cadillac DTS

  • Roneedstoknow
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8 months 2 weeks ago #75966 by Roneedstoknow
Lots of communication and ECM pCM 2009 DTS was created by Roneedstoknow
2009 Cadillac DTS loss of communication with ECM PCM 
 

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  • Tyler
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8 months 2 weeks ago #75969 by Tyler
Replied by Tyler on topic Lots of communication and ECM pCM 2009 DTS
What fault codes are you getting from a vehicle scan? What testing have you done so far?

What test equipment do you have available?

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8 months 1 week ago #76018 by Roneedstoknow
Replied by Roneedstoknow on topic Lots of communication and ECM pCM 2009 DTS
Snap-on Solus Pro scanner

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8 months 1 week ago #76166 by Roneedstoknow
Replied by Roneedstoknow on topic Lose of communication and ECM TCM on 2009 Cadillac DTS
I can only communicate with bcm. The only code I was able to get was lost communication with radio Everything was fine for as much as I know, we just put in a used motor cause of a cracked head. I've checked fuse pulled fuse box apart checked wire harness plugs, keep most all sensors from the blown engine. 

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  • Noah
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8 months 1 week ago #76411 by Noah
Replied by Noah on topic Lose of communication and ECM TCM on 2009 Cadillac DTS
The EBCM (antilock brake module) connector is notorious for not seating well after an engine swap. If the CAN network is broken at that connection, there will be no communication and no start.
"Ground cannot be checked with a 10mm socket"

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8 months 1 week ago #76485 by Roneedstoknow
Replied by Roneedstoknow on topic Lose of communication and ECM TCM on 2009 Cadillac DTS
Appreciate tall the help and info I can get, I'll be checking that connector, I questioned myself about that connection from the beginning, there was something about did seem right like maybe the locking mechanism was not catching correct

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