By May 2000, prototype vehicles were being constructed for testing in 2001. Two coaches were constructed; a driving and an intermediate cab, with both trailer and motor bogies; for testing the units were attached to a four car TGV Reseau set. The test train (named "Elisa") began tests in late 2001; including ride and noise level measurements, as well as testing of a multisystem "Europantograph", designed to work with all four European overhead electrification systems. Dynamic tests included measuring traction motor, braking rheostat, transformer and inverter cooling under high-speed conditions, as well as aerodynamic tests on airconditioning system performance at high speed. Initial tests were complete in May 2002.