For the Alto (& other Maruti cars), the OBD scan tool, is it this one ?

More details here -
ETAS - Tech 2 (GM) - Diagnostic Troubleshooting - Service Diagnostics - Applications & Solutions - ETAS Products
I gather that GM, & hence Suzuki, uses ISO (ISO 9141 ?) for OBD-II, although I'm not sure. Maybe fellow team-bhp members who works for Maruti could help ?

Anyway, this tool allows reprogramming of the ECU, & would be overkill for those of us wishing to just take a peek.
To the RaceDynamics guys, first of all, keep up the good work, second of all, are you by any chance using ScanTool's VTach ? Saw a CNBC show on you guys & thought an interface you were using in it looked similar...