Nissan Repair Questions? Ask a Mechanic for Answers ASAP
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Are you a shop?
This U1000 normally starts with performing CAN diagnostics to determine which control unit is not communicating. Do you have a scanner that can do that? One that can perform CAN diagnostics?
Ok then. You could have a Ecm issue.
Give me a min. I will share with you the ecm terminal reference chart to check the CAN circuit to the Ecm. If the CAN circuit passes, then you need a ECM.
Hang on please
Of course you only perform the checks that you can do for Key ON, and Key OFF.
Check all your input voltages of course, and I would check the CAN line.
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