Barrett, Coles rushed back for quarterfinal
Barrett will wear the No.10 jersey after missing the final match of the regular season – against the Crusaders last week – due to a sinus infection.
His return is the only change to the starting XV.
Barrett's replacement against the Crusaders, Otere Black, moves to the replacements bench.
The rest of the Hurricanes backline remains unchanged.
Jordie Barrett will again start at centre, with Vince Aso ruled out for the second match in a row due to a groin strain.
Coles will play his first match in four months via the reserves bench.
The Hurricanes and All Black hooker has not played since he suffered concussion against the Highlanders on March 18.
In Coles' absence Ricky Riccitelli has been the preferred hooker with halfback Thomas Perenara leading the side out and they will continue those roles against the Brumbies.
Coles takes James O'Reilly's place on the bench, while Black bumps wing Ben Lam out of the matchday 23.
Hurricanes: 15 Nehe Milner-Skudder, 14 Wes Goosen, 13 Jordie Barrett, 12 Ngani Laumape, 11 Julian Savea, 10 Beauden Barrett, 9 Thomas Perenara (captain), 8 Brad Shields, 7 Ardie Savea, 6 Vaea Fifita, 5 Sam Lousi, 4 Mark Abbott,3 Jeff To'omaga-Allen, 2 Ricky Riccitelli, 1 Ben May.
Replacements: 16 Dane Coles, 17 Chris Eves, 18 Loni Uhila, 19 Reed Prinsep, 20 Callum Gibbins, 21 Te Toiroa Tahuriorangi, 22 Otere Black, 23 Cory Jane.
Date: Friday, July 21
Venue: GIO Stadium, Canberra Stadium
Kick-off: 19.35 (21.35 NZ time; 09.35 GMT)
Referee: Glen Jackson (New Zealand)
Assistant referees: Nic Berry (Australia), William Houston (Australia)
TMO: Ian Smith (Australia)
