Blindspot modules have no communication, C-CAN timeout from ESC/ABS/TCS -Wiring checks out… Bounty Available
I really could use some help on this one. I think I have looked at it too long and just feel like the answer is right there but just can't see it. Brought in from collision shop after rolling downhill and damaged rear end including replacement power hatch, replacement bumper assembly, replacement floor panel. I was able to get the power gate going after tracing the harness to a bad connector. That was day one. Moved on to the blindspot not working. I am using Alldata's diagrams - which are not complete. Some pages have 2019 wiring that does not apply to the 2020. Some pages info not released from manufacturer yet. Here is what I have done. I have verified all fuses , I have checked continuity of the high and low speed CAN to ESC, continuity in the Local CAN between Left (master) and right (slave) . Both BSM's have power , good grounds, the right hand seems to either receive power from or sends power to the crash switch where you can turn the BSM's on or off. Nothing. I can manually add power to the RH BSM out circuit to the BSM LED and it illuminates. Still even with that no communication with BSM;s . ABS/ESC works fine and all actuation test will run (will Autel) . My diagram says if continuity exists and after codes are cleared and returns replace master BSM..I did today with new unit….no change. So before I tunnel vision down on the BSM circuit even more….why I am getting ESC timeout? The weak diagnostic tree says if BSM doesn't fix replace ESC/ABS controller, but I think that is a symptom of another issue. I can't seem to get over the fact the OBD2 port won't communicate with any scanner except Autel. I even tried my GSCAN-3 . I have 60 ohms between high and lower can at ALDL connector. Power and ground check out on the port as well. I believe there is a simple connector unplugged or plugged in wrong somewhere. I just cannot find it. The Alldata does not give instruction to check the OBD2 port backwards. Willing to pay bounty! I will even let you port into my laptop or scanner via Teamviewer if that would help.
Chris, Keep in mind I know nothing about your GDS tool. Is the gds software up to 2021? Or is it online Like General motors? Most Hyundai/Kia Blind spot problems I have seen, from body shops, are caused by side view mirrors. Never seen that cause a communication problem. Mike
I too, have found BSM in/op codes coming from aftermarket side mirrors ( the Keystone (new) will not WORK on Mazda for sure . The LED on the glass is made cheaper and the ohms aren’t right. I using Autel Elite - full module scanning and bi-direction . So I bought a subscription to Hyundai for J2534… Autel J box. It won’t connect to the car to even read the VIN. If I use Hyundai to access the SRS…
Chris, I have had the autel communicate when other tools wouldn't. It must be a baud rate thing or mabey it doesn't time out as quick as others and keeps retrying. The reason I say that is, the older Nissans would time out with the snap-on, The autel took forever but it always did eventually communicate. All the times I have run into that situation, I've also had U0100 or U1000 codes of death…
Thanks! that is good information. Still something funky going on with it. Didn’t have a chance to do any more tests yesterday.
Harness was the issue. Pinpoint test showed good voltage and grounds, but when connected , where the harness was pulled (yanked)( from accident the pins did not seat enough for monitors to work (did the wiggle test and continuity tests- they all passed on top level diagnostic). Several repins later… fixed.