Hi,
I have a 2010 Hyundai Elantra Touring GL 4 cylinder with 250,000 kms and the cruise control shuts off after a few minutes. The brake lights are working and I have replaced the clock spring, the cruise control module on the steering wheel (which has the buttons to turn on and operate the cruise control) and the wiring harness attached to the cruise control module.
I had initially thought it might be the brake light switch but ruled it out as the cruise control was turning off entirely, not just disengaging the speed. To be more clear, when I turn on the cruise control the CRUISE light comes on and then I press the SET button to set the desired speed. If I press on the brake the SET light turns off but the CRUISE light remains on. If it was the brake light switch then I feel it would mimic the results of when I physically press the brake (leave the CRUISE on but turn of the SET), however both the SET and CRUISE turn off.
I am now wondering if I made a mistake and it really is the brake light switch, but to be honest, I really don't know where to look next.
Anyone have any ideas on where I should go next?
I just replaced the brake switch and that was the issue. A faulty switch can turn off both the CRUISE and SET lights.
Did you run an enhanced diagnostics scan with a reasonably able OBD2 reader (Blue Driver, MX Plus, Innova)? Perhaps there's a DTC that would provide a clue.
I have an Innova 3100 reader and it is not showing any codes but I am not sure how good of a reader it is compared to the others you mentioned.
Does it have enhanced diagnostics and live data functions?
It does have some live data functions like oxygen sensor reporting but I am not sure on the enhanced diagnostics. I just plug it in and it comes back with no codes after about 20 seconds. Is there some particular diagnostic function that I should be looking for?
It should be checking every sensor and its range and reporting whether they are operating within normal parameters.As for live data, that has to be interpreted.
I know a mechanic that works on the side. If I gave him a few bucks to hook up a scanner do you think he would be able to isolate the issue? I'm sure his scanner is much better than mine.
Can’t hurt. It could be a number of things really. Several different faulty sensors, if trans has any slip that would do it possibly, ECM maybe having issues. Try this. Disconnect your negative lead to your battery and while its off turn your headlight switch on and leave it on for about 10-20 minutes. Then remove your positive cable and short it and the negative cable together while they’re both disconnected from the battery. This effectively “reboots” all your modules. Since you have a Hyundai the only thing you should lose is radio presets, saved navi locations and maybe any BT paired devices.
Don’t just randomly try this on other cars. It can make a mess of things on Lexus, Mercedes, BMW. Like they won’t run anymore until a tech reprograms them.
Thanks for the suggestion. I gave it a try but it didn't work. I didn't think it would be this difficult to pin point. After this I thought it would be the wiring or the ECM but apparently other sensors are involved that monitor other systems that could disengage the cruise if certain parameters aren't met.
Do you know if the brake switch light was the issue that it would just disengage the SET speed and not turn off the cruise entirely? I just want to eliminate that from the possible causes.
There was a recall because of a problem with that switch and Hyundai was supposed to replace it for free.
NHTSA Campaign Number: 13V113000
https://www.nhtsa.gov/vehicle/2010/HYUNDAI/ELANTRA#recalls
Hi,
Thanks for the link but it doesn't seem like it is the same issue I am having. My issue randomly shuts down the cruise system entirely, and the way I read it, the recall issue is that you can't disengage the cruise. There was a lookup by VIN as well and when I put it in nothing shows as outstanding for my car.