When you say it is module, i dont get what is it? Either it should be a phone or modem. I have worked on debug ports, but the problem is in hardware,
If you get the voltage at the pins of sim connector your problem is solved.
You should get 3V or 1.8V at SIM connector depending on the type of SIM card module being used.
Seems purely hardware problem, check this pdf at page 46 and below.
unable to attach the pdf. can you refer this pdf in the link
**broken link removed**