My car has not been running since the lockdown due to covid. Today I opened the hood and took the battery into my house to charge it. And it all started here, I stupidly locked the car and closed the hood completely, my car was completely locked. I calm down and get the key manually and I can't open the driver's door again, I tried both with 2 mechanical keys, it seems the mechanical door key is faulty. Someone help me, I saw on youtube a few people jump with the positive terminal of the starter, and the car has electricity they can unlock with the remote normally. Help me
Sorry for my bad english

 

Using the mechanical keys is your only hope, I'm afraid. Perhaps you twisted them the wrong direction? Both keys not working properly without human error involved just seems so improbable.

 

I did some research on the forums, I'm afraid this happened to me. Can I ask where the starter nx200t is located, is it accessible from the bottom of the car? i want to find the positive wire of starter. Anyway thanks you for the reply

 

Starter is below the battery and removed from the top after removing the battery, battery tray, and reinforcing bracket. I cannot see the positive cable when viewing from under the car with a mirror and light.
Another approach might be to remove the plastic cover under the radiator (2 screws, 4 bolts, and 3 plastic push-fasteners - see attached image).
If your arms are long but small, you can then reach up behind the radiator and operate the hood release. Alternatively, use a stick or long screwdriver.

 

Before attempting the above, I recommend to spray the mechanical keys with WD-40 or a lock lubricant and try them again. Consider that the mechanical key has probably never been used since the vehicle was manufactured.

 

Makes me want to go and try my manual key on my RX.

 

To release the hood latch, move either of the parts marked with a red circle in the direction indicated by the red arrow. The images are as viewed from the engine toward the front of the vehicle. The image at right is a better angle shot managed with the help of a mirror.

 

You know what?
I've added this to my spreadsheet as a YEARLY maintenance item!
Spray WD-40 into mechanical door lock(s) and test key(s).

 

This looks really doable, considering the lever/cable can be pulled with light hand force.

 

Thank you very much, I hope my arms are long enough. Have you been in the same situation as me and opened the hood in this way?

 

when I turned the key clockwise, about 75 degrees, nothing happened, my car had its front door repaired, I think that's the problem.

 

I have had release cables break, resulting in a need to open the hood from below. But fortunately, not (yet) on the NX.
Since it appears this may become the "prime option" in your case, I studied the mechanism more carefully.

Most important. there is an error in my previous drawing. I had incorrectly identified the moveable part located below the spring. See corrected version attached to this post.

I do not think any adult will be able to do this by hand. There is ~18 inches between the mechanism and the lower plastic cover, and only ~2 inches of space front-to-rear. Few adults have an arm less than 2 inches in diameter. There are also some obstructions in the path, the most significant of which is a ~1 inch diameter coolant hose located just below the mechanism (dashed circle in the attached drawing).
The most practical approach appears to be a long (at least 18 inches) flat-blade screwdriver positioned at an angle to use the hose as a fulcrum. The hose is somewhat flexible and will deflect when force is applied, but I think it will retain enough rigidity to allow the release lever to be moved to the right a sufficient distance. I successfully did this (albeit from above) with a shorter screwdriver, but the hood was already open at the time, so less force was probably required.

A length of inexpensive 1/2 inch electrical conduit clamped to a shorter screwdriver (with 2 worm-gear band clamps) could also work if a long screwdriver is not available.

 

Thank you for your enthusiasm, I bought and waited for a new car jack to make it, cost me about 150$, I can consult you: I used the mechanical key and turned it in both directions. about 75 degrees, so my lock is completely broken right? If i call a locksmith, can he open my car door with my broken lock?

 

To (attempt to) answer your "Locksmith" question, I performed some experiments on my NX. The short answer appears to be NO; a locksmith cannot help you.

Why not? . . . it turns out the "mechanical key" is not mechanical in the traditional sense, it that it does not mechanically unlock the door. Instead, rotating it clockwise operates an electrical switch that powers the door actuator(s). So the mechanical key is useless with a dead battery. I proved this theory with the following experiment:
(1) With hood and drivers window open, I reached in and locked the doors. The "mechanical" key worked as described above to unlock them.
(2) Next I removed the "Door Lock #1" fuse (20A; located in the under-hood relay/fuse box). Rotating the "mechanical" key now had no effect whatsoever. In my view, this is a silly and ineffective design by Toyota/Lexus, and not clearly disclosed in the Owners Manual.

Reviewing the wiring diagrams, I noticed Lexus includes an optional door lock backup battery in some markets, mounted in the center console. This allows the door locks to still operate even with a dead or disconnected main battery. Unfortunately, this useful feature is not included in NX300 models offered for sale in the USA (or probably Canada). I do not know if the hybrid model includes it.

After raising each front tire with the jack, I recommend to lower it back onto something solid like one or more concrete paving blocks or scrap boards. This is more secure than the jack itself, and will not obstruct the space you need to work within. Jack stands, if you have a pair, could be used as well.

 

You could ask several Locksmiths if they have a "break-in specialist" on their staff, or a freelance one they hire when needed for a particular job. These guys have special tools and skills and can open most locked vehicles in 30 seconds. The disadvantage of this option is there is typically some residual damage to a weatherstrip or interior trim piece, and it might cost ~$100 to have them replaced.

A sort of "last resort" option would be to break the small window just forward of the outside mirror, then reach in and manually unlock that door. You might inquire at some body shops the cost to replace that window. My guess is ~$300, as the side window and its guide must be first removed to access the small window. I estimate someone who has done it before should be able to to accomplish the task in less than 2 hours.