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Kia can bus tcm mil request


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Hi all
I have a Kia carans 2007 diesel un chassis.
I have an intermittent can high fault .tcm requesting mil and tcm can high fault . When the fault is present the can high is flat lining with the occasional blip like an injection pattern. I have disconnected all units on the network ie dash. Pcm.Tcm. All units on HCS. Data wiring diagram . I
I sometimes think I’ve located it but it’s just intermittent back to normal.
I do have a turbo boost fault when driving hard . At the moment I’m ignoring the boost fault hoping it ecu reducing power due to tcm coms data? .
I don’t have a massive amount of experience with can.
would really appreciate any help with this ( I don’t know where to go from here)
Thank Mark
Ps I’ll update fault codes later


FCA and Hyundai Master Technician
Staff member
Problem? Tag me please
Resistance on can? Can you post the faulty singal measured with scope?
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