no fuel in the engine- fuel pump was checked working correctly
battery is new and working

Problem seems to be the security system is shutting off the fuel pump and spark plugs

Mechanic suggested after a code indicated that the ECU was not communicating that we check the key first
Key was OK according to the electronic lock smith .
Ordered two ECU to have a back up
Put in the first replacement ECU same problem persists
electronic key mechanic came out read all the data and said in addition to the ECU the NATS appears to not be communicating
We located and replaced today
had locksmith back out he made a key to work with the NATS replacement (car started five times correctly and then stopped and gave a bad ecu code again

so we have three ECU , a replaced nats
any ideas on what could be triggering this code
Thank You

 

What is the exact code that is being generated? Without more precise information, your question is too vague.

In the meantime, Here is a link to the section of the service manual with the NATS security system info. Start reading on page 356.

http://boredmder.com/FSMs/Nissan/Maxima/2002/EL.pdf

 

thanks dennis, i was thinking the same,