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Re: No communication between ECM and TCM
Posted to Transmission Forum on 12/30/2014 1 Reply

Sounds like it. The voltage should be 2.5 plus or minus a bit. Check for CAN high at the TCM as well just to be thorough. Its also worth checking sensors and solenoids as a possible cause. If you have no codes its not likely, and I wouldn't expect it to only a... Login to read more.

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