Scania Diagnose and Programmer (SDP3) is a PC-based diagnostics application software for Scania trucks, bus chassis and Scania engines. Licenses for the application can be purchased for 1 hour, 1 day, 7 days, 30 days or 90 days. A purchased license key can later be updated any number of times as required. All can be available in the official site.
But, if you have no much budget on this, go for a crack version on the web. Usually crack software cost $50 around. The older version, the lower price.
See this
Scania SDP3 V2.31.1
Scania SDP3 V2.27
Scania Developer Software (incl.XCOM, SDP3, BNS II)
Tip: How to install SDP3 Windows 7:
http://blog.obdexpress.co.uk/2016/08/13/install-scania-vci-2-vci3-sdp3-v2-27/
Note: SDP3 vs. XCOM
The SDP3 application includes
Stored fault codesreading, proposals for remedial action and delete option.
Assisted trouble shooting, parameter settings
Control unit configuration and settings.
Information about electrical components and their location.
Input and output signals.
Activation of components.
Spare part programming.
Circuit diagrams.
Chassis data.
The XCOM program is designed to
Read ECU ID, data, parameters, fingerprint.
Read and erase DTC.
Spare Part program all systems.
Gather all data for fieldtest functions.
Load, modify, compare SOPS files.
Both SDP3 and XCOM can work with Scania VCI3 or VCI2 interface