To make a long story short, 6 months ago my anti-theft system shut down my truck. After a little research, I "thought" it was due to a bad battery that corrupted the key file. I am just now getting around to addressing it, new battery, plugged in diagnostic to recode keys and now I come to find out that it can't communicate with truck. Did a little more research and possible problem could be bad or broken wires. I have done the best visual check of wires that I can thru out the majority of harness and have come up empty. Need help with some ideas, or other ways of testing wiring, modules, etc. I am competent but by no means super well versed. Please help.

 

As always, check all the fuses !!
One of the possibilities could be no power to the scanner.
If you can, check if you have power to pin 16 of the diagnostic plug.
If there is an open in the network , or a module in the network not getting power , the system is considered down and will not communicate.

 

[QUOTE=hanky;117979]As always, check all the fuses !!
One of the possibilities could be no power to the scanner.
If you can, check if you have power to pin 16 of the diagnostic plug.
If there is an open in the network , or a module in the network not getting power , the system is considered down and will not communicate.[/QUOT

I checked all fuses, and I do have power to scanner

 

Do you have battery power at pin 16?
Your scanner will still work and lite up, but will not be able to communicate if there is no power at that pin.

 

Yes power at bottom right pin. Pin 16

 

I do not have power to 1 strip of about 4-5 fuses under hood, I was told that the pats system is the cause of that. True?

 

Did you have the key on when you checked the fuses that showed no power?


If you could provide some idea of what those fuses are supposed to protect I should be able to better answer your concern.

 

I will double check when I get home
68 blank
70 a/c clutch containment switch
72 ignition coils
74 electronic vapor variable cam timing
76 vpwr : pcm

 

They should be 4 digit codes, need entire code.

 

The only codes I have are on the picture above in thread