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Jay, Nissan Technician
Category: Nissan
Satisfied Customers: 20486
Experience:  20+yrs experience with Nissan & Infiniti Trained & Certified.Currently still working for Dealer
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Code u1000 service engine light does not light at all won't

Customer Question

code u1000 service engine light does not light at all won't start. Has history of mice in vehicle
Submitted: 1 year ago.
Category: Nissan
Expert:  Jay replied 1 year ago.

Hello my name is ***** ***** thank you for your question.

Are you a shop?

Customer: replied 1 year ago.
but little to no Nissan experience
Expert:  Jay replied 1 year ago.

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?

Customer: replied 1 year ago.
Do not have consult using snap on solus. Can communicate with all modules except ecu. Says no communication
Expert:  Jay replied 1 year ago.

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

Expert:  Jay replied 1 year ago.

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.

If you have any more questions on this, please feel free to ask.

If not, and you're satisfied with my help, please Rate me.

I hope I have provided you with Excellent Service.

Thanks Jay!