Here is the instruction on programming key for Maruti Suzuki Swift 2015 Indian version without pin code by using Xtool X100 Pad tablet key programmer.
Instruction:

Well connect X100 Pad and PS_VCI Box
Select Immobilizer function
Select Suzuki

Select Suzuki India

Select Immobiliser

Select IMMO type: Type 5

Select Key Porgramming

Select Free Pin Code

If the Xtool X-100 Pad prompt “Please send the following ID code to the makers to query the security code”
Press Yes to continue

After performing this function, all keys will be erased.
Press Yes
Communicating…

Program success, whether to program next one?
Totol keys: 1
Press Yes to continue, press No to quit programming.
Program success. End of procedure.

Test the new programmed key