Help Needed

He has a class 2 communication problem, here is how to check. You have to start by disconnecting each module 1 at a time, when you disconnect the IPC, turn the key on and use the tech 2 and see if you can communicate with class 2, if you can go to the next module, ECM disconnect it see if you can communicate with class 2, if you can go to the next module, keep doing that to each module and the last one disconnected is the one that is to be replaced, also Test the DLC ground circuit terminal 5 for a high resistance or an open. Also Disconnect the Fuse Block-Left I/P connectors that contain the Class 2 serial data circuits. Disconnect the connector containing the Class 2 serial data circuit from the BCM module. Inspect Fuse Block-Left I/P connectors at the terminals containing the Class 2 serial data circuits for poor connections/terminal tension. Test for an open circuit between pin 2 on the DLC connector and the harness connector of the Fuse Block-Left I/P. Test the Class 2 serial data circuit for a short to B+ or a short to ground between the mating connectors terminals integrated into the Fuse Block-Left I/P, that contain the Class 2 serial data circuits. All the modules will be listed with the tech 2, class 2 is sometimes a pain in the ass to diagnose.

Thanks Brian
That should to the job. That flux voltage on data line had me stumped but see what you mean something on the feed is causing problem.
Thanks Again let you know what happens
Ernie

Lol, the guy does not know what a full stop is.

What do you mean?

Sorry, I meant the guy who asked the question. One complete sentence without any full stops. ;)