Complete electrical failure

[Jolson71]

I've got a 2012 5.0 r spec. There had been no electrical issues with the car. Yesterday I got home after driving for an hour, shut the car off and went in the house. About half an hour later I went out, started the car and the dash lit up with warnings. Check vehicle power system came on, lost all power steering, made it about a block and the car died completely. I could smell something electrical hot or burning under the hood like something burned out. Alternator was free and spinning, belt was fine, battery is only a couple months old. Now, even with a battery charger on or using jumper cables there is absolutely no electrical power getting to the vehicle. It's completely dead! I'm 2.5 hours from the closest Hyundai dealer, so looking for any suggestions on what it could be. Fuse blown somewhere?

 

[jimmy buoy]

I'd disconnect the battery and test it with a meter and a load tester first. You never know - could be an internal short even with a new battery. Other than that, I'd be looking to see where the main fuse is for the system.

 

[g_947880]

I'd disconnect the battery and test it with a meter and a load tester first. You never know - could be an internal short even with a new battery. Other than that, I'd be looking to see where the main fuse is for the system.

Thanks for the response. I'll try that and update in the next couple days.

 

[Jolson71]

So, replaced the battery, alternator(giant pain by the way!) and belt today. Car starts, runs, and sounds normal but there is still a problem. The battery light is on and "check vehicle power system" occasionally flashes. What else could it possibly be? Is there a voltage regulator or some sort of power module in this system that could be bad? I can't get it in to be diagnosed until Monday and would rather not take it to a dealer. No blown fuses either.

 

[OUsig]

did the check vehicle power system message go away after driving?
Mine had that before I changed the alternator also - and yes a major pain to do! But the message when away after I drove maybe 1 mile with the new alternator.

 

[G-398435]

Turns out the new alternator was junk too! Car died on the highway in a -20 windchill here in MN. Towed to a shop, another new alternator and now seems to be fixed. We will see.

 

[rlkoch1]

I was having all kinds of electrical problems with my 2011 Genesis sedan: flickering display, no power at all when I went to start it, etc. I checked the battery voltage and it was ok, as was the alternator. I cleaned the battery terminals although they looked fine and that did nothing. I then disconnected the ground cable where it is attached to the car body in the trunk, cleaned the area even though it looked good and reconnected. I have had no problems since (three months ago)!!!

 

[OUsig]

I was having all kinds of electrical problems with my 2011 Genesis sedan: flickering display, no power at all when I went to start it, etc. I checked the battery voltage and it was ok, as was the alternator. I cleaned the battery terminals although they looked fine and that did nothing. I then disconnected the ground cable where it is attached to the car body in the trunk, cleaned the area even though it looked good and reconnected. I have had no problems since (three months ago)!!!

Good point as grounding points are a common issue. Even ones that are out of the weather (in the trunk). Electricity is funny like that especially since you cannot see it (lightning is another story)

 

[memphiskane]

On my 2012 it was acting funny from time to time. Cant remember why but at one point I had to remove the ground point for the ECU and the bolt hole was completely rusted out. I moved it to a different bolt after grinding down the paint a bit. No more electrical goofyness after that.

 

[helo14]

Good point as grounding points are a common issue. Even ones that are out of the weather (in the trunk). Electricity is funny like that especially since you cannot see it (lightning is another story)

I have been having problems for about 6 months with my 2012 Genesis. I would park and come back a few minutes later, car was totally dead. Sometimes it would come back after a few minutes doing nothing, other times I would go in the trunk and check battery cables etc. I took it to the dealer. He kept it for 5 days the first time and couldn't get anything to fail. I brought it home and drove it for a few months and the same thing happened again. This time there was no power for a full day. I talked to the dealer again and decided to have it towed to the dealer. I went home and opened the trunk to get my stuff out and power came back. They had it for a few days and could find nothing. I finally told them to start opening and closing the trunk aggressively until the power failed. After a while it did and they were able to trace it to the B+ fuse box over the positive terminal on the battery. They swapped it with another car to troubleshoot and couldn't get it to fail. They ordered a new fuse box (about $80) and no problems since.

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[3dwaxmill]

Hi Guys. This is the only thread that is close to my problem. I have a 2013 Genesis Rspec. Yesterday went to work freeway driving and city streets. Got to work parking lot and the car went totally dead with no warning. Checked the battery voltage, all fuses all ok Terminals all tight. Finally decided to disconnect the negative terminal waited a minute, reconnected and all good. No idiot lights and no probems. Happened today but came back in a few seconds.

I also have replaced the alternator. Agreed it truly is a pain in the but.

 

[3dwaxmill]

well since Saturday the Genesis has completely shut down 3 times. each of these were not like the first it came right back and i was able to start it. Fortunately each time i was sitting at an intersection. I hate to think of this happening going 70 mph. Any help would be appreciated. The Steelership is going to rape me.

 

[3dwaxmill]

Is it possible it is the ECU or is there a body control module ?

 

[3dwaxmill]

Any help would be appreciated I am at my wits end.

 

[lbrandon]

Any help would be appreciated I am at my wits end.

Hi I have 12 R-Spec similar problems abs light illuminated with other warning lights while sitting in car wash. All of a sudden speedometer races up to 160 mph keep in mind I am sitting still. Odometer clocks mileage as if I am running 160 mph. I attempted to turn car off and I could not turn off car. Once car wash was complete shifted car in drive and speedometer drops to zero and odometer stops. I drive the car to woodall Hyundai in Danville va. They told me I needed a new abs module aka hecu costs $3,000. After research done found the recall and had Hyundai corp pay. I get car back but having issues with brakes and warning lights. Dealership has had my r-spec for 5 weeks and they are in communication with Hyundai headquarters and they cannot resolve issue. I believe I will have to trade my r-spec. I am frustrated and disappointed. R- spec has 145,000 miles on it.

 

[lbrandon]

Here is a continuation of the problem. The dealership has had my R-Spec for 5 weeks. I finally had them to look at my vehicle again and they reported to me on Monday according to Hyundai Corporation giving the techs guidance that they found that my vehicle had a low voltage on one side of the car. Theys informed me that Hyundai Corp informed the techs that they needed to pull down the whole rear end axle to get access to some wires to check. I stopped the dealership from performing this task due to it would cost me $100 per hour and the Service manager indicated to me that it was a 4 to 5 hour job. There is no way I am paying for this service and it possibly could find nothing. I requested to get my car on Monday evening and since I have been driving it has been braking fine. However the ESC EPB Brake Control and ABS Light will come on from time to time. However I noticed if I make sharp turns and have to brake is when it the lights will illuminate. I drive this car due to I know the dealership replaced the ABS Module and new brake fluid and check all hoses and calipers. Everything is fine with braking. So does anyone have any ideas as to how to check for this low voltage or prevent these lights from illuminating erroneously. I just now disconnected the battery and will let it sit for the whole night. I may trade my car reluctantly but I do not know how worse this electrical problem can get. Looking for any ideas or suggestions. I will try anything.

 

[lbrandon]

I just found a possible resolution to the problem on the Hyundai Forum. I will paste it below.
Discussion Starter • #1 • Jun 7, 2018

2014 Genesis 5.0 R-spec. ABS, ESC warning lights come on when starting the car. EPB AND AUTO HOLD warning lights come on between 5-10 mph. Car operates fine minus no ABS assisted braking. Diagnostic codes are C1204 C1203 C1205 C1652. Was intermittent when lights first came on, then off, then stayed on. Any troubleshooting would be greatly appreaciated.



Your codes suggest a problem with the front right hand wheel speed sensor circuit. Unfortunately, there isn't really much troubleshooting you can do DIY. Your really limited to a visual inspection of the sensor and it's tone wheel unless you have access to an oscilloscope. You might try disconnecting the sensor and connect a voltmeter across the two terminals of the sensors harness connector to see if there is voltage at the sensor when the ignition is on. If there is voltage present you can be pretty confident the wiring is OK between the ABS ECU and the sensor, meaning there's a pretty good chance the sensor itself is faulty.

 

[3dwaxmill]

Sorry I did not post what my problem ended up being. The problem only happened when i would come to a stop when engine rpm was at its lowest. 100 degrees outside AC on full .
few times i would be able to just restart others I would have to disconnect the battery then it would start. The battery showed 12 volts never had a sluggish start from the battery.

I decided to get a new battery and magically the total shutdown stopped. Then a month later I had to replace the alternator for a 2nd time. This time the drive pully with the clutch in it went out. Would not drive the alternator.

 

[Coffeeboss]

I just found a possible resolution to the problem on the Hyundai Forum. I will paste it below.
Discussion Starter • #1 • Jun 7, 2018

2014 Genesis 5.0 R-spec. ABS, ESC warning lights come on when starting the car. EPB AND AUTO HOLD warning lights come on between 5-10 mph. Car operates fine minus no ABS assisted braking. Diagnostic codes are C1204 C1203 C1205 C1652. Was intermittent when lights first came on, then off, then stayed on. Any troubleshooting would be greatly appreaciated.



Your codes suggest a problem with the front right hand wheel speed sensor circuit. Unfortunately, there isn't really much troubleshooting you can do DIY. Your really limited to a visual inspection of the sensor and it's tone wheel unless you have access to an oscilloscope. You might try disconnecting the sensor and connect a voltmeter across the two terminals of the sensors harness connector to see if there is voltage at the sensor when the ignition is on. If there is voltage present you can be pretty confident the wiring is OK between the ABS ECU and the sensor, meaning there's a pretty good chance the sensor itself is faulty.

Just had the same thing happen in my 2014 R-Spec 65K and took it to the dealer. They ran diagnostics and then showed me 3 pages of feedback. This is the second dealership that didn't really give me decent feedback and then said that the electronic emergency brake module is bad and that's a $2000 part taking 5 hours to install? Do they see the R-Spec roll in for service and just see $$$? What is the Auto Hold?

 

[jimmy buoy]

Auto hold engages your e-brake once you come to a complete stop. It disengages as soon as you touch the throttle. Using the e-brake, if it fails the Auto Hold will be unable to work.