When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hybrid TechnologyUnique topics related to the 2015 up NX300H model hybrid drivetrain and other features/options found only on the NX300H. Please use the main forum for discussion about shared components with other first generation NX models.
I recently bought a 2020 NX300h from a salvage auction. The car has minor frame damage in the rear, on the drivers side but there's little damage to any components apart from taillights and parking sensors. When I received it, and still now, 3 weeks later, it refuses to start the hybrid system. I connected a brand new 12v battery and the gauge cluster will power on, but nothing else will work. I can't kick it into acc mode either. In the screen there's a bunch of error messages, mostly hybrid system malfunction, braking system (bc the parking brake is stuck on) and airbag warnings (no airbags blew in the accident).
I have a suspicion it has to do with the safety system and it doesn't want to start when there are airbag and braking issues. My current plan is to repair the body and frame and panels and see which errors go away when the car is cosmetically back to normal.
I'd like to avoid taking it to a dealer since it'll all be out of pocket and I currently can't move it very easily either. I also don't have the proper scan tools to see the hybrid ecu codes but I might be able to get my hands on that.
Anyone got any tips or advice? It's greatly appreciated.
Attached are the warning messages and a pic of the damage
Disclaimer . . . this is a speculative hypothesis and not based on experience-based wisdom .
What is common to all of your posted error messages is they are all system diagnostics. In my estimation, there are only 2 possible causes that are common to all of the represented systems:
(1) 12V power.
I do not have any service info for the hybrid model, but I do not think the overall 12V power flow should differ that greatly from the gasoline models. I do not see any single fuse that would affect all of those systems yet permit the instrument panel warning display to function.
(2) CAN multiplex bus.
All of the systems referenced in your images, including hybrid propulsion, have a node on the CAN bus, which among other things, is used to communicate diagnostics. Furthermore, the rear parking sensors (blind spot monitor detectors) and rear view camera are also all individual CAN bus nodes. Damage to either of the CAN bus wires could possibly compromise the entire communications network and result on false error messages. I would start by replacing the obviously-damaged rear sensor and see what happens.
I should have added that I suspect you will find the parking sensor connector has been crushed and/or wires severed. You might have to purchase a replacement connector and splice it into the harness.
I should have added that I suspect you will find the parking sensor connector has been crushed and/or wires severed. You might have to purchase a replacement connector and splice it into the harness.
Excellent thank you so much for the help. I was planning to get the sensors and rear electronics sorted out before I panicked. Hopefully that'll clear away most of the diagnostics. Thank you again
Hello,
I have the same problem with my 2019 Lexus NX300H.
No one could find the problem to solve it.
Did you fix it and what was the problem?
How did you fix your car?
Thanks a lot.
hi
i just read your post from 2023 .i have purchaed a similer car reently and that has same issue as well.
can you share your contact details (whattsapp) so get more infro or can you please let me know how did you fied it ?
Many thanks
Originally Posted by Fankacer
Hello,
I have the same problem with my 2019 Lexus NX300H.
No one could find the problem to solve it.
Did you fix it and what was the problem?
How did you fix your car?
Thanks a lot.
Need Help, NX300h Not Starting
.
