Commands for the TGO's orbit insertion were successfully uploaded on Tuesday, the European Space Agency (ESA) website said, "ready for execution".
On Wednesday, the ExoMars mission - a two-spacecraft joint venture between the European Space Agency (ESA) and Russian Federation - will arrive at Mars after a 7-month journey through space.
The test lander woke up, as scheduled, minutes before it was due to arrive at Mars' atmosphere at 1442 GMT, the ESA said.
Propelled by a Russian rocket, the European built lander will begin sending data from the surface which will help determine the kinds of conditions the Stevenage Mars rover will face when it touches down in 2020. The lander separated from the Trace Gas Orbiter and according to information received from the spacecraft things are proceeding as planned.
Schiaparelli was released from the mother ship, the Trace Gas Orbiter, on Sunday. The main work of the TGO will be to look for evidences of geological or biological activity on Mars. The full telemetry link was restored within a couple of hours.
The lander, which will only operate for a few days, is created to test procedures and equipment for a rover, due to launch in 2020, that will search for past or present-day life on Mars. The fate of the probe remained a mystery until January 2015, when the Beagle 2's remnants were spotted in images sent back by NASA's Mars Reconnaissance Orbiter (MRO).
Landing on Mars, Earth's neighbor some 35 million miles (56 million km) away, is a notoriously hard task that has bedeviled most Russian efforts and given NASA trouble as well.
While the landing attempt will no doubt occupy the public's and media's attention, the European Space Agency also has the crucial tasks of parking the TGO on the planet's surface.
Beagle 2, Britain's attempt to land on Mars in 2013 failed as it failed to be kept on track as it was descending the red planet's surface.
A joint venture between Russia's Roscosmos space agency and the European Space Agency (ESA) is about to reach a dramatic milestone.
If all went to plan, Schiaparelli would deploy a parachute and then thrusters to slow down to 10 km/h before hitting the surface.
Descending to Mars is the most risky part of the operation since the launch in March, and will a major moment for the programme.
ESA's mission to Mars, which is being carried out through a partnership with Russia's Roskosmos, is two-pronged.
Both the TGO and Schiaparelli lander missions are part of the broader ExoMars program.
Finally, at 3pm BST, the ESA tweeted that the giant metrewave radio telescope, near Pune, in India, had picked up a signal from Schiaparelli. It made it to Mars but its solar panels didn't unfold properly.