So recently I started to repair my Lexus NX300h 2019 year old after accident. It had hit to the front, not very hard one, SRS in place, no geometry changes.
Now I faced with problem: all window controls do not work, climate control does not work (even through monitor touch pad).
OBDII errors:

B1507 – Flash To Pass Switch Circuit Failure
U0142 – Data bus: body control module (8CM) 8 – no communication
U023A - (can;t find)
U1104 – SCP (J1850) Invalid or Missing Data for Chassis Status Request
B1660 – Seat Driver Front Up Circuit Open (desc.)

It maybe somehow related to Body Control Module (BCM) maybe....? What reason could be?

P,S,: What means "Flash To Pass"?

 

Maybe CANBUS isn't working properly due to wire damage? If you clear the codes do the same ones come right back?

 

Correct. All codes listed are "live" codes, not history ones.
Do you know where this Body Control Module (BCM) is located?

Before checking wires maybe better to begin with fuse check....
Does BCM has own fuse/relay?

 

On US cars, BCM is on drivers side behind the steering wheel close to the fender wall. It's basically behind the row of buttons (if you have them) for trunk open, heated steering wheel, parking sensor, auto high beam, etc.

For cars with steering wheel on the right hand side, I believe it's the opposite but don't quote me.

 

@Lexuswiz Thanks a lot. I'll check it it first.
I found on internet that accident can partly or fully destroy BCM.
Maybe change of BCM solve the problem...

 

Can you post a photo of the damage? I tend to agree with LeX2K that damage to the multiplex bus is more likely than damage to the BCM. The headlights and Radar Cruise control transducer are all nodes on the multiplex bus. The BCM also operates the door locks; are they functioning correctly?

Image #1 below shows the location of the BCM on a left-hand-drive NX. I looked at satellite images of major roadways in Lithuania and it appears to me the road use conventions are identical to America and Canada, so I have assumed you have a left-hand-drive vehicle.

P,S,: What means "Flash To Pass"?
This is a colloquial expression that describes one use of the high-beam headlights that is popular in America. Refer to images #2, #3, and #4 below.
The dashed red box in image #2 describes the "momentary" high-beam headlight switch, which is used for "flash to pass".
Image #3 shows the passing lane convention on American multi-lane highways.
In image #4, the driver of the green car is overtaking the red car. He desires to request the driver of the red car to move to the right and allow him to pass. He does this by flashing his high beam headlights 1 time.

 

Here are two pictures of accident. Main impact went to hood. as I see.
Forgot to say that back camera (when driving backwards) does not work too

 

Check for a damaged electrical connector at each headlight (attached image shows the location of the control unit) and, if your NX is equipped with Dynamic Radar Cruise Control, at the transducer located directly behind the "Lexus" logo at the center of the grille.

Diagnostic code U023A refers to loss of multiplex network communication with nodes at the front of the vehicle.
Symptoms of a U023A code may include:
IPM-A won't power up / inoperative- Malfunction Indicator Light ON
ABS Warning Light ON
Red Brake Warning Light ON - ESC/ESP Warning Indicator ON
Typically the causes for this code to set are:
Open in the CAN bus + or - circuit
Short to power or ground in either CAN bus circuit
No power or ground to IPA-A module
Rarely - faulty control module

Read more at: https://www.obd-codes.com/u023a

Check Attached CAN bus system diagram shows all of the modules on this network. Pay attention to the acronyms and their descriptions because they are not always consistent with other Lexus/Toyota service literature.

The headlights themselves appear to be intact, but you will likely need new hood, grille, fenders, and front bumper cover, plus numerous plastic and metal brackets and support pieces.

 

Thank you so much for detailed explanation! Now I know where to direct my attention.

Also this is what I found on google so far:

"OBD II fault code U0144 is a generic trouble code that is defined as “Lost Communication with Body Control Module “D”, and is set when the PCM (Powertrain Control Module) detects a break in communication between itself and the BCM (Body Control Module)."
and
"One particular example of why stable communication is required between the PCM and the BCM involves climate control."

Climate Control (as well as all window controls) does not work for me so maybe it is the case for BCM error U0142?
Maybe you know where is PCM located on Lexus NX?

 

When viewed from the front of the vehicle, the Powertrain Control Module (PCM, ECM, Engine control ECU) is located just behind and to the right of the battery (red ellipse in the attached photo).
If the PCM is reporting error codes, then it is likely functioning correctly. All of the symptoms reported so far favor a damaged CAN (multiplex) bus. Are you able to open the hood? Do not be concerned about further damage to the hood. It is aluminum, not steel, so cannot easily be repaired, particularly once creased.

 

I have attached the engine picture. It is Hybrid version so view is slightly different from yours.
I have investigated all the errors and am almost sure that all of them are related to connection problems except this one:

B1660 – Seat Driver Front Up Circuit Open (desc.)

The reasons I found so far:
P Seat airbag active mode indicator (related to Airgag system,)
Passenger Airbag ON/OFF indicator circuit malfunction (related to Airgag system,)

Below is a table with trouble areas.
Indeed all climate control block including Airbag indicator is just dead. Climate control does not work on multimedia monitor too (shows empty scales).
Probably it is the reason for error above?

 

PCM appears to be in approximately the same location on the hybrid. Your 12V battery is in the rear so my description relative to the battery was obviously useless .

Does your vehicle have the memory driver's seat? If yes, the seat is connected to the CAN bus to pass position sensor data to the module where the memory is stored.

Front crash sensor is located right where the hood is damaged, so airbag error is not a surprise. Despite the damage to the hood, the airbags will not deploy unless the accelerometer under the console confirms the impact AND judges the crash to be severe enough.

Climate control cluster malfunction could be CAN bus related, or simply a fuse. Look for10A fuses labeled "ECU-B #2" and "ECU-IG #2". The most reliable way to check them is either by probing both test ports with a voltmeter (with vehicle turned on in case of the ECU-IG #2 fuse), or remove and swap with other 10A fuses, and see if anything changes. Do the seat belt unfastened lights also not function?

Window controls are NOT on the CAN bus; they have a separate low-speed bus that links the drivers main control to the 3 other windows. However, the window controller is powered through the same fuses I mentioned above.

 

Note there is a second front crash sensor located near the driver's side headlamp (item *2 in the drawing).

 

There are two SRS sensors - on sides of radiator. Looks like in tact.
I'll check fuse first - maybe problem is there.

 

Changed 10A fuse and it solved problem with Clima but windows still not function.
In repair manuals there are a lot of suggestion how to repair them.
Try to use them,