I recently had a nissan electric truck with a similar problem, it had a steer contactor which would not energise and was comming up on the dash as steer fault. What I found was an earth fault in the steer motor had caused the system to shut down the steer contactor. We disconnected the motor which then energised the contactor, cleaned the motor out and put it back together and seemed to work fine. Its worth a shot checking out the steer motor to begin with.