Cadillac Repair: PCM to IPC communication failure, cadillac eldorado, communication failure

Question

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Followup To

Question -
It is a 1992 Cadillac Eldorado TC

Answer -
What was the original question ?.

Use the FOLLOWUP choice. Do NOT start a new question.


tom


Ok sorry about that.  The original question was I just purchased a 92 Cadillac Eldorado and I am having a little
problem PCM and IPC communication.  I get the codes from both modules
indicating failure to communicate, I have run a diagnostic while the problem
was present and I have no "ECM DATA" and "IPC CODE I034".  I was just
wondering if this could be a bad ground or is it the alternator not
providing enough current or is there a problem with the ECM?  This problem
comes and goes while I am driving, also the voltage varies from around
13.9 to 12.5 volts at stops. The codes I am getting are E047 and I034

Answer
You will need to contact me at:


[email protected]


In order for me to provide you with pictures and and electrical schematic to find and fix your problem since this board does not allow sending pictures.

PLEASE include your original question(s) and the MAKE-MODEL-YEAR and ENGINE SIZE of your vehicle when you contact me.

PLEASE tell me if you do your own repairs and or your skill level of auto repair. This is VERY VERY important if I am to be able to help you repair your own vehicle.





Tom