U1000.Car wont start

Question

I have a 2010 Nissan Sentra and change the battery and fuel pump. Everything is workibg but the car will not stsrt. They said having ECM connecting and the code is U1000. Canr want start.

Answer 1

U1000 even with  this code the car would start, To diagnose this code the , you start the engine and monitor the CAN communication circuit. Something else is preventing the engine to start, like the anti theft