I need a complete wiring diagram

[jakecxvii]

With my car driving the way it is
(Very delayed and hard shift between 1st 2nd and 3rd gear) and all of these codes it must mean I have a bad ground or a short somewhere in the wires right?? I tried searching online but I can't find a complete wiring diagram and I have no clue where to start because I already went through all visible wires and grounds I can see (under hood, under car, in trunk, and under steering wheel...) I'm very lost and need help I lost my job because I was afraid to drive my car to work and chance making my problem worse

 

[arcman]

Service manuals/wiring diagrams:

Hyundai Genesis - Google Drive

drive.google.com

Any number of defective CAN modules could start throwing errors like this (A bad chip in my Electronic Parking Brake started showing similar errors to yours) but usually they wouldn't include the TCM. You could take a chance and start the parts cannon by replacing the TCM. Lots of cheap ones on ebay (some under $50). 2015-2016 P/N is 95440-4FCH1. Looks like it's up under the left side of the dash.

It could be the trans valve body that's controlled by the TCM but I don't see any CAN link to it so I don't think it would corrupt the CAN bus. I'd start with replacing the TCM. My $.02. Wait for some other replies.

 

[nashR]

Just found this thread.... is there similar documentation for the 2023 G80 V6-3.5L? Thanks in advance!

 

[FlyTy1801]

Just had the same issue with my 2015 Genesis 5.0. my parking brake is stuck, and I have every warning light. I used a friend's dealer diagnostic tool and am currently trying to see where the failure is. I'm hoping its just the EPB.