2012 4.6 Sedan: Cruise control / ABS malfunction

[jjsea55]

We've had this vehicle for a few months... acquired from a close family member. The cruise control and ABS dash lights are illuminated and were when acquired. We use the vehicle, but would like to correct the problems. My local Hyundai dealer states a repair cost of around $3500. Are these two issues linked in some manner via a controlling module, or is it just coincidence that both have malfunctioned separately? Do I have less expensive options beyond the dealership repair? This is not an everyday use vehicle for us, but would like it to function normally. Thanks for any input offered!

 

[joegr]

... Are these two issues linked in some manner via a controlling module...

Yes, but not via any "controlling module."
Smart cruise can't work without the ABS working. It uses it to do the braking when needed, so if the ABS has a fault, the cruise automatically disables itself.

 

[jjsea55]

Thanks for your reply, joegr. Is the “smart cruise” the same or similar to adaptive cruise? I actually didn’t know this vehicle possessed this feature. So… if I was to correct the ABS function, is it likely the cruise would retain functionality?

Would the ABS throw the light if it was due to a faulty wheel sensor? My understanding is that the dealer must intend to replace the “primary function apparatus” to reach that level of expense.

Again, really appreciate your take on this.

 

[joegr]

Yes, Smart Cruise = Adaptive Cruise. Different manufacturers have different names for nearly the same thing.
Smart Cruise will not work if the ABS has a fault. If the ABS fault is fixed, and there are no other faults related to Smart Cruise, then it will work.
Yes, a bad wheel sensor could be the cause of the ABS fault, or it could be the whole module. Did the dealer pull codes before giving that estimate? They may have one indicating that it is the module.

 

[jjsea55]

Thanks again, sir. The previous owner had the evaluation done with the dealer, so I'm unsure at this point of the code(s)... but your point is taken regarding the high estimate. As a novice to the Genesis, would one be so fortunate for the module replacement to be a "plug 'n play" task... relatively easy to access? Perhaps there are additional settings that would need to be effected or tweaked to ensure the system is working normally?

Update to post: wife provided estimate from the sale folder. Correction line states:
"Would have to replace HECU and ABS Module". Parts: $2573.25, Labor: 4.0 - $520.00

I'm fairly certain they would have run the codes to determine fault, although sometimes a dealer may opt for the higher priced option. This estimate was provided in April of '21. Any knowledge of what the HECU may be? Thanks!

 

[joegr]

HECU = Hydraulic Electronic Control Unit.
Sound like they want to replace the electronics and the hydraulics.
It is not plug-n-play as the new module has to be configured to match the car using the dealer's scan tool.
If it's any consolation, it cost that much for just the electronic half on my daughter's 325i several years ago.

 

[jjsea55]

Thanks, again! I'm actually in the process of evaluating the use of pre-owned parts. Do you think a reputable non-dealer shop could dial the system in with their shop's scan tool... after installation? I suppose I could take it to the dealer for this function only, but many shops have the high-end scanners, as well as Genesis-knowledgeable techs.

 

[Gunkk]

Thanks again, sir. The previous owner had the evaluation done with the dealer, so I'm unsure at this point of the code(s)... but your point is taken regarding the high estimate. As a novice to the Genesis, would one be so fortunate for the module replacement to be a "plug 'n play" task... relatively easy to access? Perhaps there are additional settings that would need to be effected or tweaked to ensure the system is working normally?

Update to post: wife provided estimate from the sale folder. Correction line states:
"Would have to replace HECU and ABS Module". Parts: $2573.25, Labor: 4.0 - $520.00

I'm fairly certain they would have run the codes to determine fault, although sometimes a dealer may opt for the higher priced option. This estimate was provided in April of '21. Any knowledge of what the HECU may be? Thanks!

HECU failures are common on the 2012 and earlier cars. Failure can cause one or more wheels to lose braking. ABS may or may not still function.

My experience with this failure on my 2012 is here:

ABS Module Failure

Bob - I have decided to keep the car, for now. I will be out of warranty by May/June at 100K, but it is driving very good and feels solid. I explored other extended warranty options but I am just going to roll the dice. Not sure if you follow my posts but I have had a laundry list of...

genesisowners.com

Repair invoice cost 5 years ago was approx $2500, covered under extended HPP platinum warranty (my cost was zero). Not unreasonable for a dealer to charge $3k today given import tariff changes, inflation, etc.

Get it fixed ASAP. I don't recommend driving the car until it's fixed.

Given the nature of the common failure (corrosion) a used junkyard unit may not have good a long term outcome.

 

[jjsea55]

Apparently there was a recall of "some" of the vehicles produced between '08 and '12 (perhaps even later) involving bad brake fluid causing corrosion of the HECU. I have yet to be satisfied that this vehicle was among those recalled. A search on safercar.com said there were no "unaddressed" recalls affecting this VIN, so perhaps it was done, if necessary. It may have only required the exchange of brake fluid and no HECU replacement, if it was indeed among those checked. I'm the third owner... my son-in-law bought the car from the dealer where he worked... after the initial owner made a trade. I'm still attempting to gather data, but leaning on taking the chance on a used part replacement. Quite possible I'd have to replace the new part in a year or two, anyway, based on their record of failure. I really appreciate the responses from this forum!