There is no new campus of AIIMS has been opened in Erode.

The AIIMS has its campuses on following locations in India:

AIIMS Establishment Year
AIIMS New Delhi 1956
AIIMS Bhopal 2012
AIIMS Bhubaneswar 2012
AIIMS Jodhpur 2012
AIIMS Patna 2012
AIIMS Raipur 2012
AIIMS Rishikesh 2012
AIIMS Kanpur 2014

The Upcoming AIIMS list is here:
AIIMS Bathinda, Punjab
AIIMS Bilaspur, Himachal Pradesh
AIIMS Gorakhpur, Uttar Pradesh
AIIMS Kalyani, West Bengal
AIIMS Tamil Nadu, Tamil Nadu
AIIMS Saharsa, Bihar
AIIMS Rae Bareli, Uttar Pradesh
AIIMS Assam
AIIMS Srinagar, Jammu and Kashmir
AIIMS Jammu, Jammu and Kashmir
AIIMS Nagpur, Maharashtra
AIIMS Mangalagiri, Andhra Pradesh

The new campus of AIIMS will be opened in Tamil Nadu soon. So you have to wait for some time for details related to AIIMS Erode.

Here I am providing list of courses offered by AIIMS Delhi for your reference:

Courses Offered at AIIMS Delhi
MBBS
M.D/M.S/M.D.S
B.Sc Nursing (post Certificate)
M.Ch. (5 year course)
B.Sc. (Hons.) Nursing
M.Sc. / M. Biotechnology
B.Sc. (Hons.) Opthalmic Techniques
B.Sc. (Hons.) Medical Technology

Contacts
All India Medical Institute
Ansari Nagar, New Delhi - 110029
+91-11-26588500 / 26588700
Fax : +91-11-26588663 / 26588641
IVRS : 011-26589999
Call Centre:011-65900669