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iamalex
Crash protection is a spring-loaded mechanical breakaway device outside the motor housing. If you look at axle coming out of the motor (towards the cassette), there's a silver cam that should still spin as normal when you shift. If it doesn't, the internal gear train is knackered.
You'll see a spring loaded arm that presses on the cam. That's the crash protection mechanism. If it's engaged with the cam then crash protection is not the problem.