The FIA added that Marussia’s brake-by-wire system prevented a failsafe from working.
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Marussia driver Jules Bianchi did not slow down sufficiently to avoid losing control when he crashed at the Japanese Grand Prix, an FIA report has found.
Bianchi suffered severe head injuries in the crash in October after colliding with a recovery vehicle in wet conditions at 126kph.
The 25-year-old remains unconscious in hospital, but is now breathing unaided.
The FIA also state that a braking system on Bianchi’s Marussia prevented a failsafe from working, which was designed to cut out the engine.
After a review of all the evidence, the 10-man panel produced a 396-page report of their findings, one of which being that Bianchi “did not slow sufficiently to avoid losing control at the same point on the track as Sutil”.
Marussia ceased trading last month after failing to find the funding required the race in the category in 2015.
“During the two seconds Bianchi’s car was leaving the track and traversing the run-off area, he applied both throttle and brake together, using both feet,” the report stated.
“The Failsafe algorithm is designed to over-ride the throttle and cut the engine, but was inhibited by the torque coordinator, which controls the rear brake-by-wire (BBW) system.
“Bianchi’s Marussia has a unique design of BBW, which proved to be incompatible with the Failsafe settings.
“The fact that the Failsafe did not disqualify the engine torque requested by the driver may have affected the impact velocity; it has not been possible to reliably quantify this.
“However, it may be that Bianchi was distracted by what was happening and the fact that his front wheels had locked, and been unable to steer the car such that it missed the crane.”
Bianchi is no longer in an artificial coma and is breathing unaided, however he remains unconscious.