My sister has a 2002 Nissan Altima, 4 cylinder, I think it's a 2.5 liter. It doesn't fire at all when cranked over, there is no spark to the plugs. The Coils on the plugs get the constant 12v when the ignition key is on, but there is no pulsed 12v signal coming from the ECM lines tot he coils. Anayzer shows OBD11 engine codes P0447 - EVAP Canister Vent Control Valve Circuit Open, & P1490 - Vacuum Cut Valve Bypass Valve Circuit. She also had Codes 1610 & 1612.Can you tell me what the probem could be, or what to do next? Test the ECM maybe? if so, is there a procedure to do that? Let me know,Thanks,Steve
Country: United StatesMake: Nissan/DatsunModel: AltimaYear: 2002Engine: 2.5l
Hello and thank you for choosing just answer,
In order to better assist you I need some information.
When you are cranking your engine do you see the security light flashing?
No doesn't seem like it's coming on at all during cranking , but comes on for a second when turning of the ignition key sometimes
OK Codes p1610 and P1612 indicate a immobilizer lock down, Which means there's a malfunction with your immobilizer which is not supplying a signal to the coils to ignite. So that's the problem here if these are the codes you have.
What you can do which sometimes works and sometimes does not is to remove the battery's negative terminal for 10 minutes and then see if the vehicle starts and if these 2 codes come back after trying to start it for a few times, If they come back then unfortunately you need a Nissan CONSULT scan tool to reprogram the keys and diagnose the problem so there's not much you can do other than take it to the dealership.
Try the battery disconnection trick and let me know if the codes come back after trying to start it or if it starts.
ok, I will, thanks
I'll wait for you.
My sister is in PA. after 12:00 there now. they are sleeping, will have to try in morning, thanks,
You're welcome. Let me know what you find tomorrow.
Hi, she disconnected the negative battery terminal for several hours & it still didn't reset the imobilizer lock down
In this case I suggest you tow your vehicle to the dealership since they are the only ones who will be able to deal with the immobilizer.
In case another expert have better ideas than mine I will opt out and reopen your question to other experts.
Ok, is there a way to bypass the security system so the transponder key isn't needed & the immobilizer doesn't function?
Not that I know of, And if there was an easy way that I can dictate to you over the internet then what's the point of the immobilizer to begin with?
The only way to bypass the immobilizer is to use a registered key.