I was left a non running 2009 370z after a buddy didn’t finish a repair.. originally it stopped running and cranked but didn’t start.. all basic troubleshooting was done then including testing all mag sensors air intake sensors steering lock sensor clutch brake sensors , timing chain checked as well as verified no spark and original mechanic. Got to the point they expected a bad wire somewhere in the vehicle causing the ecu to not finish sending rhe start signal to the plugs/ distributor as far as I know and then it sat for a few years. I just got it and started with new battery and new key fob battery .. video shows I have yellow blinking im
immobilizer light and another red key light on dash when trying to start it..

I started rechecking and bypassing clutch switch and steering lock fuse I was reading about but the previous mechanic told me the starter may have went bad during his testing as it does not crank at all now.. I do have a replacement used starter in the box if needed, but right now I’m just starting to troubleshoot more and I am wondering what exactly she immobilizer key lights are trying to tell me on the dash as I have the yellow one blinking along with the red one cycling while trying to start it..

please take a look at the video I made I’m wondering if you guys have any thoughts on this and appreciate any help as far as where to start next as far as testing and figuring this thing out..

https://drive.google.com/file/d/1ooK...w?usp=drivesdk

 

Compressed video so I could post it direct to view easier

09 370z no start key lights immobilizer

Attachment 471527

 

When I was reading codes I was getting many connection errors from diag tools to the obd and I found a disconnected harness under the glovebox. AFter reconnecting that harness I got codes and connected to all controllers. At start I had many codes, but after clearing a few and replacing the crankshaft position sensor again along with some other things I got it to start!! Thank you


It has a very rough idle and will not rev much past 3k rpms in any gear. I drove it to local gas station and filled with premium to clear out the little old gas that was left allready. It dosent seem like a limp mode to me because it isnt a exact rpm it stops at and stays there, but around 3100-3200 rpms range the engine baseically feel like it starts miss firing and will not go past 3100-3300 rom range even with accelorator pushed all the way. Can anone confirm or deny this is the limp mode on it or not?


Codes I still have are still p0335 for the Crankshaft position sensor, even after just replacing it again. Is this likly a wiring/ground issue at this point or is it more likly the aftermarket sensor isnt working right?

Also still getting:

p0550 Power steering pressure sensor/switch circuit - should I just be trying to replace the sensor due to this error or something else first? Seems like it may be hard to get to I didnt find any exact videos for it yet.

&

b2607/b2109 Steering Lock relay - this one I am confused about as I did previously pull the 10a steering lock relay fuse during diagnostic and I know most people seem to leave it out as a long term fix with this model, but I have no heard if you are supposed to get these codes so I reset, codes returned, so I tried replacing the 10a fuse, code remained, Reset again with fuse in and code remains. Car now starts in all these scenarios (allthough it has a rough idle and dosent rev much past 3k like I mentioned earlier)


That is where I am at.. any suggestions are really appreciate how to proceed next.

 

Are you using OEM sensors? Aftermarkets usually cause more problems.

As for the PS pressure sensor and Steering lock, I cannot comment as I'm not as familiar with 370Zs as I am with the 350Z. Things you can try...
Check power and grounds, the vehicle sat for a while and clearly there's been some work done prior to you taking it over. Get a copy of the FSM and start digging through the wiring diagrams and troubleshooting workflows for the remaining codes. The FSM should be available on Niccoclub forums.

Good Luck!
-Icer

 

What your video shows looks very much like an immobilizer issue, not a mechanical failure. The combination of flashing red and yellow lights on a 370Z is practically a signature ESCL/NATS/BCM issue.