Trulli believes in TF106B potential

The car, a heavily revised version of the TF106 the Japanese squad began their season with, allowed Trulli to fight for a podium position at Monte Carlo. In the end, however, the Italian retired with a hydraulic problem while he was running in third place.

Trulli is now working on understanding the new car better, testing at the Barcelona circuit.

And despite a tough first session yesterday, the Toyota driver believes in the potential of the TF106B.

"We had a tough day yesterday because of some electronics problems but today it is better," Trulli told autosport.com. "I am still learning about the car, and I can feel there is more potential (than with the previous one).

"The car at the moment is not all to my liking so we have to work on that. I am having a little struggle to drive this car at the moment, but I am sure we will work it out."

The Cologne-based squad struggled with tyre problems early in the season, the TF106 unable to generate sufficient heat into its tyres.

Trulli admitted the new car has not solved the problem, but he claimed things are getting better.

"The tyres, they do look better," he said. "We have made am improvement, but in getting temperatures into the tyres we are not completely on top of the problems yet.

"As for Silverstone it is very difficult to judge, we will see."