Security reset on a 1989 300zx - 1989 Nissan 300ZX

Question edited for clarity.
Question moved to model category.

You can't Disarm the system, but there are a number of ways to try and reset it.

https://www.justanswer.com/mazda/e6z2i-believe-mazda-cx-7-locked-security-open.html

https://www.vehiclehistory.com/questions/how-do-i-perform-the-2007-mazda-cx-7-security-system-reset-204995

and more using the door lock and the key.

https://www.google.com/search?q=2007+mazda+cx-7+security+system+reset

..

http://ricksfreeautorepairadvice.com/passlock-iii-reset-procedure/

Passlock III reset procedure reset security system on chevy buick...

Is the security light lit on the instrument cluster ? If not it's not a security issue . When you turn the key to the start position nothing happens ? or the starter spins the engine !

Sallie, may have to have security reset at the dealer if you can not do it yourself. Check the attached links,instruction and guides, Good luck
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check engine immobilizer. Reset the CPU with a code reader to reset the security system

The Security features are installed into the ecu at the dealership. you can unplug the battery for 15 minutes and then re connect them this resets sensor codes and such but im pretty sure that your problem will still persist. i know for a fact that even if you replaced the ecu the security features will not let the vehicle run without pairing the new ecu with the existing security features.

If the security system is acting up, and you had to try th 10 minute reset, this means that some part is failing. The system rarely gets confused, its normally a failing part. The 10 minute reset can get you by for a while, but eventually the bad part will fail entirely and leave you stranded. This link might help you out.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

It doesn't have to be the security. a dead battery won't let the car crank either. With a security problem the car will crank but not start. The security can be reset if the battery is charged and up. Turn the key on ( do'nt crank ) the security light will stay on if it needs to be reset. If it remains on leave the key on for 15 minutes around then it will go out. turn the key off and then turn it right back on, the security light will be on again. Leave the key on till the light goes out again, then turn it off then turn it back on , wait again when it goes out turnthe key off then right back on then crank the engine and it should start. With a scanner the code will be security neweds to be reset. Thia is all anyone can do to reset the security and it's what you were charged $450 for. Following directions.

to reset the security on you cavalier you must turn the key to the on position, for 15 minutes.

after 15 minutes the security will have reset and the car will start like normal.

It is theft detected. definitely security system. take to dealer or call dealer for code to reset.