Jaime Alguersuari has been forced to pull out of the second season of the FIA Formula E championship with DS Virgin Racing on medical grounds, as the Spaniard is still suffering with an unidentified illness.

The former Toro Rosso F1 driver says he suffered a 'fainting episode' shortly after the Moscow ePrix in June and the FIA commission temporarily suspended his racing licence until his condition was medically identified and he was deemed fit enough to drive again.

In a statement released via Alguersuari's Facebook page, the former British Formula 3 champion says he is still struggling with the unidentified illness and as a result has had to abandon his plans of a second season in Formula E with DS Virgin Racing.

The Spaniard finished 13th in the inaugural Formula E championship despite missing the double header final round in London and has wished his team luck for the start of the new season.

"During July I underwent several tests for which there has not been a medical resolution and I am still waiting for the final diagnosis," Alguersuari said via his Facebook page. "For this reason I need to announce that, unfortunately, I will not be able to take part in the FIA Formula E Championship for the 2015/16 season with my team DS Virgin Racing.

"I want to wish good luck to the team in the new championship and thank everyone for their support."

The 25-year-old will release an update on his condition and any future plans in September. The 2015-2016 Formula E championship gets underway in Beijing on the 17th October.