2015 Genesis Electrical/Dash problem. HELP!!

[dznylvr]

Hallelujah & PTL, It looks like we finally have a solution.

Here's a follow up guys, hopefully the final follow up.

With the rash of cold weather here in so Cal, I was finally able to get the dash to fail and drive it all the way to the Hyundai dealer in failure mode (about 14 miles) to show the service writer the failure.
The service writer witnessed the dead Tach & Speedo, the flashing TPMS, Check Engine, and ESC lights. He asked that I leave it running for the Tech to put a computer on it and they found CAN bus errors.

The Service Manager asked if he could drive it home to see if he can replicate the issue the following morning and I agreed.

I contacted the Service Manager the following morning to confirm that he was able to replicate and the SM stated that he didn't have to take it home since it started failing as soon as he drove 2 minutes down the road.

So, after 2 weeks of diagnosis, they have determined that there is a short in the Wire Harness causing the failure when below 45 degrees.

The parts are on order and they expect about a week to remove and replace the harness.

I hope to have it back by the end of next week and put this issue behind us.

 

[Yette]

2015 Genesis 5.0L Ultimate with 35,500 miles.
I am having a similar dashboard sensor fault issue with my car. Colder weather in New Jersey.
I am having AEB, SCC, traction control and ABS lights illuminated. The faults periodically reset for a limited time, then restart. Took the car to the dealership today, they indicated I have a rear wheel speed sensor failure which is driving these alarms. They ordered a part, so I don't know whether that resolves the issue. Will check back in upon replacement.

 

[arcman]

dznylvr,

Thanks for the follow up.

I'm very curious as to which 'wiring harness' they are replacing, as there are many and I would love to know how they tracked that harness down to be the culprit. Unless they are just throwing parts at it, it takes a well trained and knowledgeable tech, with proper tools, to understand and diagnose CAN bus issues. I've spent a lot of time researching this topic (in anticipation of electrical issues with my car) and it is daunting to say the least.

If they fix the problem (and it stays fixed), I wonder if there's any way you can get details of how they determined the problem. If you wouldn't mind, can you ask for a written report of the failure? It would sure help me (if mine ever acts up) and it may help others in the future.

Please keep us posted.

 

[dznylvr]

Arcman,
I'll try to get as much info as I can when I pick it up. They're telling me it s/b ready by 03/01.

 

[Yette]

2015 Genesis 5.0L Ultimate with 35,500 miles.
I am having a similar dashboard sensor fault issue with my car. Colder weather in New Jersey.
I am having AEB, SCC, traction control and ABS lights illuminated. The faults periodically reset for a limited time, then restart. Took the car to the dealership today, they indicated I have a rear wheel speed sensor failure which is driving these alarms. They ordered a part, so I don't know whether that resolves the issue. Will check back in upon replacement.

Follow up to my previous post, I was having many dashboard lights including SCC, ABS and TPMS. I took the car in to the dealer, they diagnosed a rear wheel speed sensor as the issue. The sensor was replaced today, I drover about 20 miles since and it seems to have resolved all my faults. The car is driving perfectly with no lights.

 

[dznylvr]

Final Update:

I picked up the Genesis yesterday after 3 weeks at the dealer and asked how they determined that the issue was the wiring harness, they stated that they had a Hyundai Engineer at the dealer for a different problem and they asked the Engineer about the issue with my vehicle.

The Engineer told them to look in a couple of places, lo and behold, they found cracked wire casing in couple of locations causing the CAN Bus failures.

Basically, the wrap on a couple of the wires had cracked and was allowing them to short, so I'm told.

They replaced 91202-B1733 & 91810-B1070 wire harnesses.

I look forward to years of trouble free driving.

 

[arcman]

Dznylvr,

Thanks again for getting back.

Sorry, but it sounds a bit suspicious. Did the dealer show you the harness(s) they removed with the damaged wires?

You'd think if an 'engineer' told them where to look, they wouldn't have replaced two harnesses (the big engine harness costing over $2,000!! and many hours of labor to remove and replace) and instead just repaired the damaged wires. Replacing the other harness (front bumper sensors) makes me think they were throwing parts at it as usual and didn't really track down the original problem.

It sounds like you'd like to be done with this (and I sincerely hope you are), but if it were me... I'd call the dealer back and ask where the problem was located so we could record this for future use.

One last thing... Not to be a Debbie Downer, but if you remember my original post in this thread, my car was 'totaled' by the insurance company due to a similar CAN bus problem. I've been driving it for over three months now and there hasn't been one fault code.

 

[LakeHarvester]

I wrote on this forum last summer about a similar problem with my 2015 Genesis 3.8

In my case the problem was a faulty fuel pump control module. I know it sounds crazy but what you are describing sounds just like the problem I had. Fortunately it was covered under warranty. I posted a video of what my dashboard looked like when I had the problem in the link below. No doubt this would freak out my wife if she was driving it when it happened.

Genesis Faults.MOV

 

[arcman]

Curious if the tach and speedo functioned properly while driving?

This is a good example of how anything on the CAN bus can create false DTC symptoms on the dash. It'd been neat to see what actual fault codes (if any) came up on a scan.

 

[dznylvr]

Yes, the Speedo and Tach worked functioned properly most of the time while driving except when the fault was occurring. When the fault was occurring, always below 48 degrees, the speedo went to to 0 no matter how fast I was driving, the Tach went to 0 no matter how much I revved the engine, it did not register any miles during the drive and the TPMS lights, the electronic steering went out/light came on, and the check engine light came on.

After looking at the paperwork given back to me again, the dealer stated that they were able to determine that it was the wiring harnesses because the CAN resistance was normal at 123.3 ohms but when the harnesses were wiggled at various points, the resistance was affected.

Attached is a video of the fault occurring.

Dash.mp4

______________________________

Help support this site so it can continue supporting you!

 

[MichaelB]

I have a 2015 3.8 RWD Ultimate. This problem (or some variation of it) popped up a few months ago. It seems like each time it happens the symptoms are slightly different. Sitting in the dealership waiting room for the 3rd time right now. Luckily the first time I brought the car in the tech was able to observe the issue!

 

[Kasmith8526]

Yes, the Speedo and Tach worked functioned properly most of the time while driving except when the fault was occurring. When the fault was occurring, always below 48 degrees, the speedo went to to 0 no matter how fast I was driving, the Tach went to 0 no matter how much I revved the engine, it did not register any miles during the drive and the TPMS lights, the electronic steering went out/light came on, and the check engine light came on.

After looking at the paperwork given back to me again, the dealer stated that they were able to determine that it was the wiring harnesses because the CAN resistance was normal at 123.3 ohms but when the harnesses were wiggled at various points, the resistance was affected.

Attached is a video of the fault occurring.

Dash.mp4

My 2015 genesis is doing the same what exactly was done for fix

 

[greekgeek]

My 2015 genesis is doing the same what exactly was done for fix

Sounds similar to my issue. Wiring harness was replaced, big job

 

[digmyGenesis]

That was my issue too. I had to change the red box on the battery on the plus side. That fixed all my issues. It must have been faulty when the car was manufactured. But couldn’t claim warrenty. Since the stupid dealer could fix the problem. I told them to change the part anyway. That fixed the issue.

 

[242genesisg80]

Yes, the Speedo and Tach worked functioned properly most of the time while driving except when the fault was occurring. When the fault was occurring, always below 48 degrees, the speedo went to to 0 no matter how fast I was driving, the Tach went to 0 no matter how much I revved the engine, it did not register any miles during the drive and the TPMS lights, the electronic steering went out/light came on, and the check engine light came on.

After looking at the paperwork given back to me again, the dealer stated that they were able to determine that it was the wiring harnesses because the CAN resistance was normal at 123.3 ohms but when the harnesses were wiggled at various points, the resistance was affected.

Attached is a video of the fault occurring.

Dash.mp4

I'm now having the same issue with my genesis here in the bahamas. The mechanic is changing the harness so I hope that fixes it ,I have already changed the gear box, the inhibitor switch , fuses, instruments cluster ....... I'll attached my photo

 

[Hodedofome]

My wife drove over one of those parking lot concrete bumps in my 2015 Genesis and scraped up the bottom front of the car on it. Ever since then, the warning light for the active air flap system will come on, and now it's setting off all the other lights. I took it to my regular shop but they don't have the equipment to look at everything, so I'll need to go to the dealership. Here is the video of some of the lights that will go off:

I'm thinking she scraped up a wire, and I'm really hope they don't want to replace the entire wiring harness because of 1 wire. Especially if we know it's a wire on the bottom front of the car. Can't be too many there.

 

[BigGenTen]

Follow up to my previous post, I was having many dashboard lights including SCC, ABS and TPMS. I took the car in to the dealer, they diagnosed a rear wheel speed sensor as the issue. The sensor was replaced today, I drover about 20 miles since and it seems to have resolved all my faults. The car is driving perfectly with no lights.

I had the same symptoms and just took my 2015 5.0 to the dealer and they are saying it is the front left speed sensor. That are wanting to charge $858 for the fix due to replacing the entire hub assembly. This doesn’t seem right to me because I found the speed sensor online for anywhere between $100-150. Do you know if they had to replace all this for your car?

 

[joegr]

I had the same symptoms and just took my 2015 5.0 to the dealer and they are saying it is the front left speed sensor. That are wanting to charge $858 for the fix due to replacing the entire hub assembly. This doesn’t seem right to me because I found the speed sensor online for anywhere between $100-150. Do you know if they had to replace all this for your car?

The speed sensor reads a tooth ring in the hub. If the problem is really with that ring or is the ring is off center due to bearing issues, then yes the hub itself would have to be replaced to solve the problem.
Sometimes, it will be the sensor, sometimes it will be the hub, sometimes it will be the wiring to the sensor, and sometimes it will be the ABS module. What it was for someone else's car has little bearing on what it will be on your car. If you don't trust that dealer, go somewhere else.

 

[BigGenTen]

The speed sensor reads a tooth ring in the hub. If the problem is really with that ring or is the ring is off center due to bearing issues, then yes the hub itself would have to be replaced to solve the problem.
Sometimes, it will be the sensor, sometimes it will be the hub, sometimes it will be the wiring to the sensor, and sometimes it will be the ABS module. What it was for someone else's car has little bearing on what it will be on your car. If you don't trust that dealer, go somewhere else.

Thanks for the insight

 

[arcman]

I'd take it to an independent repair shop for a second look. 10-15 minutes on a lift. Wheel bearing/hub would have to be really worn for the ring to hit the sensor.