Hyster H80FT N005V04364F

I need a little help please.

Code
524261-11 ECU 5-Volt Sensor Supply A Data Invalid, Cause Unknown
524261-2 ECU 5-Volt Sensor Supply A Incorrect Output

we replaced ECU and Throttle sensor with new hyster parts
We have done all trouble shooting we can do. We have removed covers on wire harness found no break or melted wire. Installed new ECU and had original ECU sent to Flight Systems they could not see any wrong. This unit Starts, runs and goes in to gear, has no throttle.

Thanks!