Lotus F1 Team opened-up strongly but Romain Grosjean experienced a loss of power in the afternoon.
Pastor Maldonado was pitched into a spin from behind and Romain Grosjean suffered from a loss of power.
Romain Grosjean end up with the ninth fastest time, and Pastor tenth quickest.
The E23 has demonstrated promising potential during its first Grand Prix event outing of 2015.
Drivers Romain Grosjean and Pastor Maldonado share their thoughts on the challenges of the Australian Grand Prix, while Technical Director Nick Chester and Deputy Team Principal Federico Gastaldi give the latest on the team and on the E23 Hybrid.
F1's new female signing has hit back at her harshest critics.
Pastor Maldonado: "My braking was compromised coming into turn four, meaning I went off the track and hit the barriers."
Romain Grosjean: "I can’t wait to for the season to start."
Pastor Maldonado: "I still feel fresh after 140 laps!"
Romain Grosjean completed 75 laps over the course of a programme of set-up evaluations and performance simulations.
Pastor Maldonado’s quickest lap was a 1min 24.348secs, completed during the course of his 104 laps.
Positive first day for Briton in his new F1 test-driver role, but he wants to race something in 2015 too.
Jolyon Palmer had his first taste of the Lotus F1 Team E23 Hybrid in his role as Third and Reserve Driver today.
Pastor Maldonado: "It is always good to see your name at the top of the timing monitors..."