I have s400 hybrid. I changed hybrid inverter. But engine not start now. Electric motor control unit and battery management system not open for diagnose. Engine control module many faults have now. Please help me 



It's possible that the battery discharged.  There is a procedure in DAS to recharge the hybrid battery so you can start the car; that might fix the issue. Failing that, there might be a bad cell in the battery and therefore it won't charge/start.