Renault is confident that overnight fixes to its battery energy stores will cure the problems that have blighted its pre-season Formula 1 testing program.
The French manufacturer has had a troubled opening two days at Jerez, with its teams completing just 38 laps so far. In contrast, Ferrari-powered teams have completed 138 laps, and Mercedes-powered cars a total of 248.
Renault's head of trackside operations Remi Taffin has revealed that the issue that hindered Red Bull and Toro Rosso relates to the energy stores on the cars.
"We know on our side we have one problem that we have clearly identified and we want to fix it," explained Taffin. "We could not fix it for this morning, so we decided to do as much as we could on our side to make sure that, for tomorrow, and especially for Red Bull and Toro Rosso, that we are sure we can take to the track at 9 a.m. We are confident that tomorrow morning we will have all three cars on track."