The Finn, who has returned to Ferrari this season four years after his previous stint with the team, has been uncomfortable with the F14 T's handling so far.
Raikkonen only qualified 12th in Melbourne after getting delayed in traffic in Q2 and then crashing on his in-lap. He was classified seventh in the race.
The secrets of brake-by-wire
"We identified some general problems which we have to tackle in Maranello and there are other aspects linked to the set-up on my car to do with the brake-by-wire system," said Raikkonen.
"Getting this device working correctly is definitely something that contributes to the general feeling from the car, because it has a great effect on corner entry.
"Having said that, the F14 T improved right through Friday and Saturday and not getting into Q3 was not down to the competitiveness of the car."
He said he was very calm about the problems and optimistic that he would be in a better position from the next round in Malaysia.
"I've been in this game for quite a while now," said Raikkonen, "and I can say this is definitely not the first time that I've gone through a difficult first race weekend.
"I'm sure that, if we work in the correct way, then right from the next race in Malaysia, the results can definitely be better."
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