Interestingly the full body scanner at the border for trucks is yet to be installed by the Union government. But on the Pakistani side, such a scanner has already been installed by the authorities. They manually check the trucks going into India from Pakistan with the help of sniffer dogs.
http://www.newindianexpress.com/nation/2019/jun/30/532-kg-heroin-worth-rs-2700-crores-smuggled-through-pakistan-seized-at-attari-border-1997531.html