Dr. Perujo presented working paper HDH-15-09 as a short introduction of the validation test program 2 (VTP2). The goal of VTP2 is to provide a methodology for verifying the HILS model in the gtr and to elaborate a new verification procedure for the gtr, if necessary. The measurement procedure is explained on pages 4 to 6. The three vehicles were tested at JRC between May and September 2013 with the Volvo bus being tested twice. As regards the accuracy of the chassis dyno, torque measurement was within ± 10 % of a wheel hub torque meter. Higher deviations were observed on the WHVC compared to constant vehicle speed operation. Data processing and comparison between experimentally measured parameters and parameters obtained by the HILS model is underway. Further investigations are necessary for resolving some of the problems encountered during the test program.